Road widening with metaling, Carpeting, Sealcoat & Construction of Protection wall from Silo Gate to Vagda village dairy under CSR at GSECL Ukai TPS.(WT-4994A Civil Colony)

respective tender. The Technical bid containing all the relevant documents will have to be uploaded

in PDF form through online on n-procure website only.

“Technical bid containing all the relevant documents of tender (PDF form with resolution

dpi or higher. The size of PDF not more than 3 MB) to be submitted through ONLINE process

only on (n) Procure.

“No any documents will be accepted in offline mode or hard copy (Except TF & EMD cover)”

Tender No. WT- 4994A

Estimated Cost of the tender items. Rs. 13885893.54/-

Tender Fees Amount (Non-Refundable) By Rs.15000+2700(18%

D.D/NEFT/RTGS GST)=17700.00/-

Earnest Money Deposit Amount Rs. 416577 (3% of The Tender value)

Pre-Bid Meeting: Bidder shall submit points for prebid As per NIT of portal and its latest

discussion indicating terms, clause No. etc. on or Corrigendum.

before in advance to this office on mentioned e-mail

on [email protected]; and Copy to:

[email protected],

[email protected],

[email protected]

[email protected]

Pre-Bid Meeting for Clarifications and other aspects As per NIT of portal and its latest

regarding this Tender at administration Office of the Corrigendum.

CE (Gen), Ukai, TPS.

Bidder may depute authorized representative for

Online [e-tendering ] tender/offer submission last date up As per NIT Details

to 18:30 hrs only [This is mandatory]

The payment of EMD [Earnest Money Deposit] As per NIT Details

In case of payment through RTGS/NEFT/DD/Pay

order/Bank Guarantee, the scanned copy of original document

must be uploaded on (n) Procure and original copy of the

same must be submitted physically in cover. (TF & EMD

Date of opening of online Technical Bid, all relevant As per NIT Details

documents submitted through online process, submission of

original DD, Pay order & BG within 5 days from Online last

Bid submission date.

EMD Payment Details (Scan Copy must be required to

upload on (n) Procure)

Tentative date of on-line opening of Technical bid/price bid. As per NIT Details or By letter

Time Limit for completion of Work 10 (Ten) Months (From the Date of

Work Commencement), Detailed time

limit mentioned in tender.

Security Deposit 5% of contract Order (End value

including GST at prevailing rate)

value within a fifteen(10) days time

period on receipt of LOI or final work

order by D.D. drawn in favour of

GSECL payable at Bank of Baroda,

Ukai branch OR by in form of Bank

Guarantee OR NEFT/RTGS.

Penalty for late completion As per GSECL’s rules.

180 Days [From the date of opening of

Validity of tender Technical Bid].

Tender Fee will be accepted by Demand Draft on Bank of Baroda, Ukai Branch in favor of the

Gujarat State Electricity Corporation Ltd. OR NEFT/RTGS, Earnest Money Deposit will be accepted

NEFT/RTGS/DD/Pay order/Bank Guarantee OR by any other means accepted by our A/C section.

Cheque or FDR will not be accepted. Right to reject any or all tenders without assigning any reason

there of is reserved by the competent authority. Contractor should possess separate PF code number

1. Bidders are requested to submit Technical & Price Bid through ONLINE (on (n)

Procure) only. Offline or hard copy of Bids will not be accepted (Except TF & EMD

cover). Further if the quantity quoted differs in any of the Technical bid and Price bid

forms, it is at the discretion of Competent Authority of GSECL to consider the quoted

I. In case of payment through DD/Pay order/ Bank Guarantee (Note: Bank

Guarantee may be applicable in case of EMD), the scanned copy of original

document must be uploaded on ((n) Procure) and original copy of the same

must be submitted physically in cover as per NIT Details.)

2. All such documents (Original DD, Pay Order & BG) should be strictly submitted by

RPAD / Speed post only. Otherwise the offer will not be considered or ignored and no

any further communication in the matter will be entertained.

“NO COURIER SERVICE OR HAND DELIVERY” will be accepted.

3. The details like Tender No., EMD, Name of bidder etc should be match on both On-line

offer (e-tendering) and submitted documents of EMD details. Any deviation found in

Data/Details/Documents between On-line offer (e-tendering) and submitted documents

of EMD details will not be considered and no any further communication in the matter

will be entertained.

The exemption in payment of EMD and tender fee shall be given to the,

a) Micro & small-scale enterprises which participate directly in tendering process

for the product which they are manufacturing / service which they are providing

and have Udyam registration for items / service under procurement.

b) Startups which participate directly in tendering process for the product which

they are manufacturing / service which they are providing and recognized by

DPIIT under the Start-up India Program and has obtained Udyam registration.

c) Organization which has registration certificate for the manufacturing product of

the tender, from Gujarat Khadi Gramodyog Board or Khadi and Village

Industries Commission (K.V.I.C) or Commissioner of Cottage Industries.

d) Board/Corporations/PSUs of the Central/State Government for their own

manufactured items.

e) State Government recognized organizations like (i) organizations for blinds,

dumb and deaf, disabled, mentally disabled persons; (ii) women's self-help group

recognized by Gujarat Livelihood Promotion Company; which participate

directly in tendering process for the product which they are manufacturing /

service which /they are providing.

f) In keeping with GeM guidelines, OEM and service providers rendering services

directly or by its own and having annual turnover of INR 500 Crore or more.

g) In keeping with GeM guidelines, Sellers/Service Providers holding BIS

license for the Primary Product Category whose credentials are validated

through BIS database.

Note: Agencies registered under Udyam in the capacity of Traders, Re-sellers, or

similar categories (i.e. other than Manufacturers/Service Providers) are not eligible

for EMD and Tender Fee.

4. Any deviation found in Data / Details / Documents between on line offer (e- tendering)

and submitted documents (Tender document fee, bidder, offer of the same bidder)

will not be considered and no any further communication in the matter will be

5. Any technical questions, information and clarifications that may be required pertaining

to this enquiry should be referred to the CHIEF ENGINEER (GEN) , GUJARAT

STATE ELECTRICITY CORPORATION , THERMAL POWER STATION,UKAI-

394680 , DIST-TAPI.

Tender Fee will be accepted by Demand Draft/RTGS/NEFT and EMD will be accepted DD/Pay

order/Bank Guarantee. Also, copy of the same is required to be uploaded in Preliminary stage in

The bank details are as under,

Beneficiary Name : M/s. Gujarat State Electricity Corporation Ltd.

Address : Urja Nagar, GEB Colony, Taluka: Songadh. Dist.: Tapi.,

Pin Code -394680.

Bank Name : Bank of Baroda Ukai,

Nature of A/C : Current Accounts. , Branch: Ukai,

IFSC CODE No. : BARB0UKAIXX (0 = ZERO)

MICR CODE No. :

Bidders should be in touch with the above websites for information regarding

revision/corrigendum/ amendment in tender till due date of on line submission and thereafter.

No separate correspondence will be done in this regard.

GSECL reserve the rights to accept/reject any or all tenders without assigning any reasons

1. Should the tender be accepted I/We here by agree to abide by and fulfill all the terms

and provisions of the tender and contractor for work/supply as applicable and in default

thereof to forfeit and pay to the Corporation the sums of money due.

2. The full value of the earnest money deposit paid herewith should be absolutely forfeited

to the Corporation should I/We not deposit the full amount of specified security deposit.

3. Bidder can not allow to withdraw their offer after opening of technical bid if withdraw

their offer then his EMD shall be forfeited and he will not allowed to participate in the

tenders invited from the same office for the period of one year for that place from where

tender is invited.

4. If participating bidder/agency have stake in one or more other agencies/bidders who are

participating in same tender and on account of submission of wrong information /

declaration in tender/enquiry certificate-A then the bidder will be declared as disqualified

automatically and EMD/SD will be forfeited.

CHIEF ENGINEER (GEN.)

GSECL, TPS, UKAI.

(1) I/We here by agree to abide by and fulfill all the terms and provisions of the tender and contractor

for work/supply as applicable and in default thereof to forfeit and pay to the Corporation the sums

(2) I/We hereby agreed to abide that the full value of the earnest money deposit paid herewith should

be absolutely forfeited to the Corporation if I / We would not deposit the full amount of specified

security deposit.

Seal and Signature of

Tenderer / Contractor

Following are the certifying agencies for obtaining the Digital Signature Certificates (DSC as

per category III).

Name of certifying agencies Web Site Address are as under,

1 Safescrypt www.safescrypt.com

2 TCS www.tcs-ca.tcs.co.in

3 MTNL www.mtnltrustline.com

4 (n)code Solutions (GNFC) www.nprocure.com

In Case Bidder needs any clarification or if training required for participating in on line tender,

they can contact the following office.

(n) Procure Cell,

(n)Code Solutions (A Division of GNFC Ltd.)

304, GNFC Infotower, Nr. Hotel Grand Bhagwati,

S G Highway, Bodakdev,

Gujarat, India.

Email: [email protected] , [email protected]

(n)Code Solutions (A Division of GNFC Ltd.)

14th Floor, Tower One, Road 5C, Zone

Gujarat International Finance Tech City (GIFT City) Gandhinagar - 382

Bidders are requested to submit Technical bid & Price Bid through ONLINE (n-Procure) only before due

date of submission. Offline or hard copy of Bids will not be accepted.

All such documents should be strictly submitted online only. Otherwise the offer will not be considered

and no any further communication in the matter will be entertained.

1) The Tender Shall be opened of the paid EMD & Tender Fees Only.

2) In case Any deviation found in Data / Details / Documents between on line offer (e- tendering)

and physically submitted documents then such tender will not be considered and no any further

communication in the matter will be entertained. Tenders must be unconditional. Conditional Tenders

will be rejected..

3) Further bidders are requested to submit price – bid i.e. Schedule-B on line only and not to submit the price

bid in physical form. This is mandatory. If price bid is submitted in physical form, same will not be opened

and only on-line submitted price will be considered for evaluation. The bidder is requested not to submit

the hard copy of downloaded tender document, condition of the contract, specification & other

relevant documents. However, bidder may download tender document & preserve with them in

Hard Copy for their future reference.

4) It is mandatory for all the bidders to submit their tender documents viz. on-line (e-tendering) in scheduled

time. Offline or hard copy of Bids will not be accepted.

5) GSECL reserves the rights to reject any OR all tenders without assigning any reasons thereof.

6) Tender Notice Number & name of the work shall be clearly written on the covers containing the

Tender fee and EMD details.

7) Technical / Price Bids will be opened on the day and time indicated in the tender notice by an

Officer nominated by the Purchaser in the presence of such of the bidders who wish to be present.

8) If participating bidder/agency have stake in one or more other agencies/ bidders who are participating in

same tender and on account of submission of wrong information / declaration in the tender /enquiry

certificate – A, than the bidder will be declared as disqualified automatically and EMD/SD will be

forfeited. Further, GSECL shall take stern action including Stop dealing with their firms.

9) Tenders shall be evaluated on firm price and cost with GST and cess as applicable unless otherwise

mentioned in the tender documents.

10) Bidders are requested to mention applicable HSN/SAC code for each item at given column in attached

“Schedule – B”.

11) Bidders are requested to mention applicable GST rate in given column. In case of bidder opting for

composition scheme “0" (ZERO) shall be mentioned in the column of GST rate.

12) If the bidder have opted for the composition scheme of GST, the same must be clearly specified with valid

declaration and certificate from department .In the event of withdrawal /cessation of the bidder from

composition scheme during the tenure of the contract, the rate (i.e. Price) mentioned in the prices bid shall

be final and any additional GST will have to be borne by the bidder himself. In no case additional amount

toward GST or otherwise will be paid /reimbursed to bidder.

13) Every bidder should mention separate HSN/SAC Code and rate of GST and cess as applicable, if no

specifically mentioned then company will have the option to take the prices as exclusive of taxes and

duties at maximum higher slab rates for the evaluation of tenders.

Every bidder shall have to inform their GSTIN NO of the registered place where from the bidder intends

to supply the goods/services, meaning thereby the bidder has supply the

Goods/ services from the relevant declared /registered place(s) of supply only.

Any technical questions, information and clarifications that may be required pertaining to this tender should

be referred to the CHIEF ENGINEER (GEN.), UKAI, TPS. Also during pre-bid meeting (if arranged) the

same may please be discussed.

14) As per notification no. 50/2018 dated 13.09.2018 provision related to TDS on GST shall be made applicable

w.e.f. 01.10.2018. Hence TDS @ 2% shall be deducted in contract value.

Note: Engineer in Charge (EIC) of Subjected work is Mrs. G.K.Sindha (Executive Engineer) (Civil)

CHIEF ENGINEER (Gen)

GSECL, UKAI, TPS

SIGNATURE OF CONTRACTOR

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

SECTION-A : PRE - QUALIFICATION

CONDITIONS,PROJECT SYNOPSIS, RTGS DETAILS

“Road Widening with metaling, Carpeting,

Sealcoat & Construction of Protection wall from

Silo Gate to Vagda village dairy under CSR at

GSECL Ukai TPS."

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

“Road Widening with metaling, Carpeting, Sealcoat & Construction of Protection wall

from Silo Gate to Vagda village dairy under CSR at GSECL Ukai TPS..”

PRE-QUALIFICATION CONDITIONS FOR TECHNICAL BID:

The bidders who wish to participate in the bidding shall satisfactorily establish that they fulfill

the following Qualifying Requirements in addition to the satisfactory fulfillment of the

requirements stipulated under tender condition:

A. Technical qualification criteria:

1) The bidder should have executed / completed similar works during the last seven (7) years in

Government / semi government / state electricity board / private limited company / public limited

company / IPP , as on last date of the month preceding the month of publication of tender, having

minimum contract /order values as indicated below :

a) One order of value not less than the amount equal to 80% of the estimated cost.,

b) Two orders, each of value not less than the amount equal to 50% of the estimated cost.

c) Three orders, each of value not less than the amount equal to 40% of the estimated cost.,

Similar work means – “Construction / maintenance work of Road / building / bridges / canals/

roads”. The works like painting, housekeeping, fencing, landscaping will not be considered

Financial qualification criteria:

1) The Average Annual Turnover of the bidder, shall not be less than Rs. 4165768 (30 % of Estimated

cost ) during the preceding three (3) financial years as one date of Techno-Commercial bid

2) Net worth of bidder shall not be less than 100% of the bidder’s paid up share capital as on the last

day of the preceding financial year. In case the Bidder meets the requirement of Net worth based on

the strength of its Subsidiary (ies) and/or Holding company and/or Subsidiaries of its Holding

Companies wherever applicable, the Net worth of the Bidder and its Subsidiary (ies) and/or Holding

company and/or Subsidiary (ies) of the Holding Company, in combined manner should not be less

than 100% of their total paid up share capital. However individually, their Net worth should not be

less than 75% of their respective paid share capitals.

Net worth in combined manner shall be calculated as follows:

Net worth (combined )= (x1+x2+X3)/(y1+y2+y3) X 100, where x1,x2, x3 are individual

net worth which shall not be less than 75 % of the respective paid up share capitals and y1,

y2, y3 are individual paid up share capitals.

3) In case the bidder is not able to furnish its audited financial statements on stand-alone entity basis,

the unaudited unconsolidated financial statements of the bidder can be considered acceptable

provided the bidder further furnishes the following documents for substantiation of its

 Copies of the unaudited unconsolidated financial statements of the bidder along with copies

of the Audited consolidated financial statements of its Holding Company.

 A Certificate from the CEO/CFO of the Holding Company, stating that the unaudited

unconsolidated financial statements form part of the Consolidated Annual Report of the

4) In cases where audited results for the last preceding financial year as on the date of techno-

commercial bid opening are not available, the financial results certified by a practicing Chartered

Accountant shall be considered acceptable. In case, Bidder is not able to submit the Certificate

from practicing Chartered Accountant certifying its financial parameters, the audited results of

three consecutive financial years preceding the last financial year shall be considered for

evaluating the financial parameters. Further, a Certificate would be required from the CEO/CFO,

stating that the Financial results of the Company are under audit as on the date of Techno-

commercial bid opening and the Certificate from the practicing Chartered Accountant certifying

the financial parameters is not available.

5) The bidder must submit Average Annual Turnover and Net worth Certificate in support of

Financial QR, duly certified and verified for authenticity from Independent Statutory Auditor of

their company / Practicing Charted Accountant/ C.A. Firms / TPIA (Third-Party Inspection

Agency ) empaneled / approved by GSECL along with copy of Annual Audited Accounts of last

Note for point No.1, 2, 3 &4:

i. Other income shall not be considered for arriving at annual turnover.

ii. “Holding Company" and “Subsidiary Company” shall have the meaning ascribed to them as per

Companies Act of India, in vogue.

iii. Net worth means the sum total of the paid up share capital and free reserves. Free reserve means

all reserves credited out of the profits and share premium account but does not include reserves

credited out of the revaluation of the assets, write back of depreciation provision and

amalgamation. Further, any debit balance of Profit and Loss account and miscellaneous expenses

to the extent not adjusted or written off, if any, shall be reduced from reserves and surplus.

Other requirements:

1) Bidder should have a separate valid GST registration number and PAN Number.

2) Copy of P.F. code from the appropriate provident fund authorities.

3) Labour License for Labour Contract: The contractor on getting the work order but before starting the

work shall have to furnish the copy of Labour License under the Contract Labour (Regulation &

Abolition) from the appropriate authorities. Also required workman group insurance policy covering

labour engaged.

4) The bidder must submit performance certificates or satisfactory work completion certificates (issued

directly by the utility) or Copy of Processed Final Bill of the executed / submitted PO from the utility.

Bidders shall be required to submit all the documents, in support of Technical QR (Such as copies

of Purchase orders/work orders / Contract Agreements, Client Certificates, etc), duly certified and

verified for authenticity by the Independent Statutory Auditor of their company / Practicing Charted

Accountant/ C.A. Firms / TPIA (Third-Party Inspection Agency) empaneled/approved by GSECL

5) Tender fee & EMD will be applicable as per NIT.

6) List of work in progress.

7) Details of equipment, tools and plants immediately available with the tenderer for use of this work

to be submitted. Details of Technical Personnel.

8) Attested copy of partnership deed to be submitted. [Applicable only to the partnership firms.]

9) Party should have to submit duly filled, sign and seal certificate “A” & ANNEXURE-5 along

10) Party has to submit/ upload either all documents duly stamped and signed. OR Declaration form on the

stamp paper of Rs.300/-.

11) Tenders must be unconditional. Conditional Tenders will be rejected.

12) If the bidder have opted for the composition scheme of GST, the same must be clearly specified

with valid declaration and certificate from department

13) Experience certificate of work executed with private firm shall not be accepted. Experience as a

joint venture or sub-contractor is not allowed and price bid of such bidders will be rejected.

14) Any other documents required to verify technical, financial capability of the bidders & other

SIGN OF BIDDER CHIEF ENGINEER (GEN)

WITH SEAL AND DATE GSECL : UKAI : TPS

Project Synopsis and Data

1) Location :- Ukai TPS,GSECL Ukai -

2) Purchaser :- CE (Gen.), UKAI.

3) Engineer :- SE (Civil)

4) Site of Project :- Vagda Village, Tal: Songadh, Dist: Tapi

5) Nearest town :- Songadh

6) Nearest Railway Station :- Songadh/ Vyara / Surat.

7) Nearest Port :- Bombay

8) Nearest Air Port :- Surat

9) Access Road :- Surat-Bardoli-Vyara-Songadh-Ukai.

10) Site Elevation from MSL :-

11) Meteorological Data

 Ambient Air temperature

1] Highest monthly mean of :- 410C

daily Max. Temperature

2] Maximum dry bulb :- 410C

Temperature ( In 0C)

3] Minimum dry bulb :- 240C

Temperature ( In 0C)

1] Average annual rainfall :- 1280.00 mm

2] For 01 hour ( In mm) :- 0.43 mm

3] For 24 hour ( In mm) :- 10.34 mm

 Wind velocity

1] Maximum wind velocity :- 7.9 Km/hr.

2] Wind direction – N,NE & SW :- NW to SE

3] For 24 hour ( In mm) :-

 Relative Humidity

1] Annual mean humidity ( In %) :-

2] Maximum humidity (In %) :- 80%

3] Minimum humidity (In %) :- 41%

4] Type of Atmosphere :- Fair

12) DESIGN DATA

 Seismic Data :-

 Intensity :- <

 Ambient temperature :-

 Other Data :-

Name of Work: “Road Widening with metaling, Carpeting, Sealcoat & Construction of

Protection wall from Silo Gate to Vagda village dairy under CSR at GSECL Ukai TPS”

RTGS DETAIL OF BIDDER

Following RTGS details shall be submitted by agency along with the tender for direct

deposit of payment to the beneficiary account. Bidder has to submit the details as under:

1 Name of Bidder :-

2 Address for correspondence :-

4 Phone / Mobile No. :-

5 Name of Beneficiary :-

6 Bank Account Number of beneficiary :-

7 Name of Bank of beneficiary :-

8 Name of Bank, branch & address :-

9 Type of account :-

10 Bank Code :-

11 RTGS Code :-

12 IFSC Code :-

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

SECTION-B : INSTRUCTION TO BIDDER

“Road Widening with metaling, Carpeting,

Sealcoat & Construction of Protection wall from

Silo Gate to Vagda village dairy under CSR at

GSECL Ukai TPS.”

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

“Road Widening with metaling, Carpeting, Sealcoat & Construction of

Tender for Protection wall from Silo Gate to Vagda village dairy under CSR at GSECL

INSTRUCTION TO BIDDER:

1. Note: TPI clause:.

"All bidders shall submit the details/documents in support of Technical Qualification Requirements duly

certified and verified for authenticity from Specified Third-Party Inspection Agency (TPIA) along with

a certificate regarding verification of authenticity of documents as per the format placed at Annexur-

1. All the documents submitted by the bidder in support of the meeting Technical QR only shall be

digitally signed by the Specified Third-Party Inspection Agency (TPIA).

The verification and certification of authenticity of documents is acceptable from any of the following

1. M/s Competent Inspectorate and Consultants Pvt. Ltd. Hyderabad, India.

2. M/s Gulf Lloyds Industrial Service India Pvt. Ltd .- Ahmedabad.

3. M/s International Certifications Services.

4. M/s Intertek India Pvt. Ltd.

5. M/s SGS India Pvt. Ltd.

6. M/s Moody International (India) Pvt. Ltd.

7. M/s TUV SUD South Asia (P) Ltd.

8. M/s TUV Rheinland (India) Pvt. Ltd.

9. M/s Bureau Veritas (India) Pvt. Ltd.

10. Hertz Inspection & Services Pvt. Ltd.

11. IRCLASS Systems and Solutions Pvt. Ltd.

Bidders shall be responsible for getting their documents/ credentials verified & certified by the

Specified Third-Party Inspection Agency (TPIA) in support of Technical QR. All the costs pertaining

to third party verification and certification (including those by statutory auditors) shall be borne by

the Bidder. GSECL shall have no liability (financial or otherwise) towards the same and shall not be

liable for any claim/ dispute between the bidder and the Specified Third-Party Inspection Agency

The following website may be referred for contact details of above TPIAs:

http://nabcb.qci.org.in/accreditation/reg_bod_inspection_bodies.php

Party shall have to submit following documents with TPI. Also refer attached Appendix-1 and

submit with TPI.

1. Past order copies (other than GSECL)

2. Work experience certificates (other than GSECL)

3. Work completion certificates (other than GSECL)

4. Details of registered partnership deeds (in the case of partnership firms)

5. Average annual financial turnover for the last three years

6. Any other supporting documents related to pre-qualification criteria.

2. The undersigned reserves the right to accept / reject any or all tenders without assigning any

reason thereof.

3. Any alteration / addition / deletion will not be considered after opening of tender, unless called

for by the GSECL for negotiations.

4. Subletting of tender is not permitted, however sub-contracting is permitted with the consent of

Chief Engineer (Gen.), GSECL Ukai.

5. Validity : The tender shall remain open for acceptance for a period of at least 180 days from

the date of opening of technical bid.

6. Security Deposit to be paid mentioned as below:

 Parties eligible for exemption from paying the EMD amount will not be required

to pay the SD. i.e. for order end cost values up to Rs.5 lakh, no security

deposit is needed.

However, these parties will still need to provide a security deposit.

 For order end cost values above Rs.5 lakh, the security deposit will be 3% of

the order end cost values.

Remaining parties i.e. not eligible for EMD exemption will have to pay performance

security (Security Deposit) @ All orders: 5% of the order end cost values as security

7. Security Deposit will be collected from the successful tenderer at the rates mentioned in final

work contract. This may be recovered by deduction through running bills of the contractors and

/ or by treating the Earnest Money Deposit (Bid Security) paid at the time of submission of the

8. SD will be accepted by RTGS/NEFT also.

The bank details are as under,

Beneficiary Name : M/s. Gujarat State Electricity Corporation Ltd.

Address : Urja Nagar, GEB Colony, Taluka: Songadh. Dist.: Tapi.,

Pin Code -394680.

Bank Name : Bank of Baroda Ukai,

Nature of A/C : Current Accounts. , Branch: Ukai,

IFSC CODE No. : BARB0UKAIXX (0 = ZERO)

MICR CODE No. :

9. Relationship with employee:- Every bidder should, at the time of submission of bid, give a

declaration in their letterhead as under.

“If in any Bidder Company/ firm, the interest (i.e. Shareholding in company and share in

partnership firm) of any employee of the tendering Company or his/ her relative as

defined in Section 2(77) of the Company’s Act. 2013 is 10 percentages or more, the

tendering Company will not deal with such Company/ Firm at all.

Tenderer therefore, must specifically disclose this fact in his technical Bid. Non-disclosure

of such facts would immediately disqualify the Tenderer for further dealing with the

Tendering Company.”

10. Bidders are requested to submit Technical & Price Bid through n procure - ONLINE only.

Offline or hard copy of Bids will not be accepted( Except TF & EMD cover).

11. A. EMD Exemption for MSEs

Micro & Small Enterprises (MSEs) who participates directly in the tendering process as Manufacturers

or Service Providers, and holds a valid Udyam Registration, are eligible for exemption from payment of

Earnest Money Deposit (EMD).

Agencies registered under Udyam in the capacity of Traders, Re-sellers, or similar categories

(i.e. other than Manufacturers/Service Providers) are not eligible for EMD exemption.

B. Purchase Preference for Gujarat-Based MSEs

Purchase preference shall be extended to Gujarat-based MSEs whose goods or services are offered for

procurement through their production, manufacturing, or service activities within Gujarat, and

To qualify for purchase preference, such MSEs must possess:

1. A valid Udyam Registration for the product manufactured or service provided and address should be

2. A valid Central Stores Purchase Organization (CSPO) / National Small Industries Corporation (NSIC)

C: Migration period for Reclassification of MSMEs: -

In case of an upward change in terms of investment in plant and machinery or equipment or turnover or

both, and consequent re-classification, an enterprise shall continue to avail of all non-tax benefits of the

category (micro or small or medium) it was in before the re-classification, for a period of three years

from the date of such upward change.

SIGN OF BIDDER CHIEF ENGINEER (GEN)

WITH SEAL AND DATE GSECL : UKAI : TPS

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

SECTION-C : SCHEDULE – A, GENERAL

SPECIFICATIONS & TECHNICAL

“Road widening with metaling, Carpeting,

Sealcoat & Construction of Protection wall from

Silo Gate to Vagda village dairy under CSR at

GSECL Ukai TPS.”

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

Sub. : “Road Widening with metaling, Carpeting, Sealcoat & Construction of Protection wall

from Silo Gate to Vagda village dairy under CSR at GSECL Ukai TPS.”

The main scope of the work is “Road Widening with metaling, Carpeting, Sealcoat &

Construction of Protection wall from Silo Gate to Vagda village dairy under CSR at GSECL

Ukai TPS.” Under the scope of this tender the agency has to carry out the subject work, various

civil works as per all items of Schedule B and as per detail technical specifications of the items. The

quantities taken under individual items are very tentative. However the agency has to carry out the

works as per the Company’s requirements.

The agency has to carry out the works as per item & specifications of the tender by providing all

materials of best quality and of standard manufactures as the samples approved by EIC and

providing best workmanship through expert manpower.

The agency has to carry out the works as per the priority & schedule given by EIC time to time even

in on or off working hours of the office. The agency will take complete care and will not damage

any other structure in premises of company.

The agency has to carry out all the works by taking all due cares of safety, security norms, with all

risks including scaffolding, strutting, shoring, etc up to any height irrespective of quantum of the

Contractor has to make arrangement for workable site condition with the co-operation of

departments of company and agencies, all necessary arrangement to get work permit is to be made

by contractor. Day to day cleaning is required after completion of job. The removed materials and

any other unwanted materials are to be transported and taken away as instructed by E.I.C.

All safety measures shall be taken by the contractor with his own cost.

The scope of work to be carried out by the Contractor shall also include Clearance of the site,

Disposal of debris, excavated material etc,

The major works involvement generally mentioned as here under-

 Clearing and grubbing road

 Excavation work for widening of road & retaining wall

 Earth work in filling with murrum

 Rolling of earthwork

 Providing and laying controlled cement concrete for retaining wall and road work etc.

 Providing and laying reinforced concrete work for foundation, footings etc.

 Providing reinforcement bar

 Plaster work for wall

 Weep hole in retaining wall

 Supplying and fixing Hume pipe 450 mm dia.

 Supplying and fixing Hume pipe 900 mm dia.

 Preparing surface of road by brushing with wire brushes

 Providing and laying bituminous grout 75 mm thick compacted with tack coat of asphalt

 Providing and laying 50 mm thick compacted B.M. with B.T. agg. of bitumen

 Providing and laying 25 mm thick compacted bituminous concrete using stone chips and

 Asphalt painting on BT surface

 Applying road marking with hot applied thermoplastic compound with reflectorizing

 Work for hiring of JCB of required capacity for excavation in soil, ash, coal, boulders,

debris, mud, etc.

 Providing and fixing road sign boards

SIGN OF BIDDER CHIEF ENGINEER (GEN)

WITH SEAL AND DATE GSECL : UKAI : TPS

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

GENERAL SPECIFICATIONS

1) In the specifications, “as directed”/”Approved” shall be taken to mean “as directed”/”approved”

by the Engineer-in-charge.

2) Wherever a reference to any Indian Standard appears in the specifications, it shall be taken to

mean as a reference to the latest edition of the same in force on the date of agreement.

3) In “Mode of Measurement” in the specification wherever a dispute arises in the absence of

specific mention of a particular point or aspect, the provisions on these particular points or aspects

in the relevant Indian Standards shall be referred to.

4) All measurements and computations, unless otherwise specified, shall be carried out as per Latest

5) The distance which constitutes lead shall be determined along the shortest practical route and not

necessarily the route actually taken. The decision of the Engineer-in-charge in this regard shall

be taken as final.

6) Where no lead is specified, it shall mean “all leads”.

7) Lift shall be measured from plinth level.

8) Up to “floor two level” means actual height of floor up to 6.5 Mt. Above plinth level.

9) Definite particulars covered in the items of work, though not mentioned or elucidated in it,

specification shall be deemed to be included therein.

10) Reference to specifications of materials as made in the detailed specification of the items of work

is in the form of a designation containing the number of the specification of the material and

prefix ‘M’ e.g. ‘M-5’.

11) Approval to the samples of various materials given by the Engineer-in-charge shall not absolve

the contractor from the responsibility of replacing defective material brought on site or materials

used in the work found defective at a later date. The contractor shall have no claim to any payment

or compensation whatsoever on account of any such materials being rejected by the Engineer-in-

12) The contract rate of the item of work shall be for the work completed in all respects.

13) No collection of materials shall be made before it is got approved from the Engineer-in-charge.

14) Collection of approved materials shall be done at site of work in a systematic manner. Materials

shall be stored in such a manner as to prevent damage, deterioration or intrusion of foreign matter

and to ensure the preservation of their quality and fitness for the work.

15) Cement, reinforcements bars & all other materials to be used shall be got approved from EIC

before starting of work. The cement, reinforcement steel & other materials to be brought at site

shall be entered at Ukai,TPS main entry gate.

16) Materials, if and when rejected by the Engineer-in-charge, shall be immediately removed from

the site of work.

17) No materials shall be stored prior to, during and after execution of a structure in such a way as to

cause or lead to damage or overloading of the various components of the structure.

18) All works shall be carried out in a workmanlike manner as per the best techniques for the

particular item.

19) All tools, templates, machinery and equipment for correct execution of the work as well as for

checking lines, levels, alignment of the works during execution shall be kept in sufficient numbers

and in good working condition on the site of the work.

20) The mode, procedure and manner of execution shall be such that it does not cause damage or over

loading of the various components of the structure during execution or after completion of the

21) Special modes of construction not adopted in general Engineering practice, if proposed to be

adopted by the Contractor, shall be considered only if the contractor provides satisfactory

evidence that such special mode of construction is safe, sound and helps in speedy construction

and completion of work to the required strength and quality. Acceptance of the same by the

Engineer-in-charge shall not, however, absolve the contractor of the responsibility of any adverse

effects and consequences of adopting the same in the course of execution of completion of the

22) All installations pertaining to water supply and fixtures thereof as well as drainage lines and

sanitary fittings shall be deemed to be completed only after giving satisfactory tests by the

23) The contractor shall be responsible for observing the rules and regulations imposed under ‘Minor

Minerals Act’ and such other laws and rules prescribed by Government from time to time.

24) All necessary safety measures and precaution [including those laid down in the various relevant

Indian Standards shall be taken to ensure the safety of men, materials and machinery on the works

as also of the work itself.

25) The testing charge of all materials shall be borne by the Contractor unless recovery at one percent

towards using charges is separately made.

26) Approval to any of the executed items for the work does not in any way relieves the contractor

of his responsibility for the correctness, soundness and strength of the structure as the drawings

and specification.

SIGN OF BIDDER CHIEF ENGINEER (GEN)

WITH SEAL AND DATE GSECL : UKAI : TPS

Gujarat State Electricity Corporation Limited

Ukai Thermal Power Station, Ukai Dam, Taluka : Fort Songadh,

Email: [email protected] Web site: www.gsecl.in

CIN: U40100GJ1993SGC019988

AN ISO-9001:2015&14001:2015 OHSMS 45001:2018 Certified Power Plant

TECHNICAL SPECIFICATIONS

NAME OF WORK: Road Widening with metaling, Carpeting, Sealcoat & Construction

of Protection wall from Silo Gate to Vagda village dairy under CSR at GSECL Ukai TPS.

NOTE: BOOKLET FOR “GENERAL TECHNICAL SPECIFICATIONS FOR BUILDING WORKS” OF R. & B.

DEPARTMENT, GOG, GUJARAT AND BOOKLET OF “GENERAL SPECIFICATION FOR CIVIL WORKS” OF

GSECL WILL BE AVAILABLE IN ADM CIVIL OFFICE AT UKAI TPS FOR REFERNCE OF RELEVANT DETAIL

SPECIFICATIONS OF ITEMS. SHALL BE CONSIDERED & ADOPTED IN WORK .

SPECIFICATIONS OF MATERIALS

1.1 Water shall not be salty or brackish and shall be clean, reasonably clear and free from

objectionable quantities of silt and traces of oil and injurious alkalies, salts, organic matter and

other deleterious material which will either weaken the mortar or concrete or cause efflorescence

or attack the steel in R.C.C Container for transport, storage and handling of water shall be clean.

Water shall conform to the standards specified I.S 456-1978.

1.2 If required by Engineer-in-charge it shall be tested by comparison with distilled water.

Comparison shall be made by means of standard cement tests for soundness, time of setting and

mortar strength as specified in I.S.269-1976. Any indication of unsoundness, change in time of

setting by 30 minutes or more or decrease of more than 10 per cent in strength of mortar prepared

with water sample when compared with the results obtained with mortar prepared with distilled

water shall be sufficient cause for rejection of water under test.

1.3 Water for curing mortar, concrete or masonry should not be too acidic or too alkaline. It

shall be free of elements which significantly affect the hydration reaction or otherwise interfere

with the hardening of concrete during curing or those which produce objectionable stains or other

unsightly deposits on concrete or mortar surfaces.

1.4 Hard and bitter water shall not be used for curing.

1.5 Potable water will be generally found suitable for curing mortar or concrete.

3.1 Cement shall be ordinary Portland slag cement as per I.S. 269-1976 or Portland slag

cement as per I.S. 455-1976.

6.1 Sand shall be natural sand, clean, well graded, hard strong durable and gritty particle free

from injurious amounts of dust clay, kankar nodules, soft or flaky particles shale, alkali, salts

organic matter, loam, mica or other deleterious substance and shall be got approved from the

Engineer-in-charge. The sand shall not contain more that 8 percent of silt as determined by field

test. If necessary the sand shall be washed to make it clean.

6.2 Coarse Sand: The fineness modulus of coarse sand shall not be less than 2.5 and shall

not exceed 3.0.

The sieve analysis or coarse shall be as under :

I.S. Sieve Percentage by I.S. Sieve Percentage by

Designation weight Designation weight

Passing sieve Passing sieve

6.3 Fine Sand: The fineness modulus shall not exceed 1.0. The sieve analysis of fine sand

shall be as under:

I.S. Sieve Percentage by I.S. Sieve Percentage by

Designation weight Designation weight

Passing through Passing through

M-11. Cement Mortar :

11.1 Water shall conform to specification M-1. Cement : Cement shall conform to specification

M-3. Sand : Sand shall conform to M-6.

11.2 Proportion of Mix : 11.2.1 Cement and sand shall be mixed to specified proportion, sand

being measured by measuring boxes. The proportion of cement will be by volume on the basis

of 50 Kg./Bag of cement being equal to 0.0342 Cu. M. The mortar may be hand mixed or

machine mixed as directed.

11.3 Preparation of Mortar:

11.3.1 In hand mixed mortar cement and sand in the specified proportions shall be thoroughly

mixed dry on a clean impervious platform by turning over at least 3 times or more till a

homogenous mixture of uniform color is obtained. Mixing platform shall be so arranged that no

deleterious extraneous material shall get mixed with mortar or mortar shall flow out. While

mixing, the water shall be gradually added and thoroughly mixed to form a stiff plastic mass of

uniform color so that each particle of sand shall be completely covered with a film of wet cement.

The water cement ratio shall be adopted as directed.

11.3.2 The mortar so prepared shall be used within 30 minutes of adding water. Only such

quantity of mortar shall be prepared as can be used within 30 minutes.

M-12 Stone Coarse Aggregate For Nominal Mix Concrete :

12.1 Coarse aggregate shall be machine crushed stone of black trap or equivalent and be hard,

strong, dense, durable, clean and free from skin and coating likely to prevent proper adhesion of

12.2 The aggregate shall generally be cubical in shape. Unless special stones of particular

quarries are mentioned aggregates shall be machine crushed from the best black trap or

equivalent hard stone as approved. Aggregate shall have no deleterious reaction with cement.

The size of the coarse aggregate for plain cement concrete and ordinary reinforced cement

concrete shall generally be as per the table given below, However in case of reinforced cement

concrete the maximum limit may be restricted to 6 mm. Less than the minimum lateral clear

distance between bars or 6 mm. Less than the cover, whichever is smaller.

I.S. Sieve Percentage passing for I.S. Sieve Percentage passing for

Designation single sized aggregates of Designation single sized aggregates of

nominal size Nominal size

Note : This percentage may be varied some what by Engineer-in-charge when considered

necessary for obtaining better density and strength of concrete.

12.3 The grading test shall be taken in the beginning and at the change of source of materials.

The necessary test indicated in I. S. 383-1970 and I.S. 456-1978 shall have to be carried out to

be carried out to ensure the acceptability. The aggregates shall be stored separately and handled

in such a manner as to prevent the intermixing of different aggregates. If the aggregates are

covered with dust, they shall be washed with water to make them clean.

M-19B TMT BARS:

19B.1 TMT BARS shall confirm to I.S. 1786-1985 OF Fe-415 Grade or above form Approved

19B.2 Other provision and requirements shall conform to specification No.M-18 for mild steel

M-26 Shuttering :

26.1 The shuttering shall be either of wooden planking of 30 mm. Minimum thickness with or

without steel lining or of steel plates stiffened by steel angles. The shuttering shall be supported

on battens and beams and props of vertical bellies properly cross braced together so as to make

the centering rigid. In places of bullie props, brick pillar of adequate section built in mud mortar

26.2 The form work shall be sufficiently strong and shall have camber, so that it assumes

correct shape after deposition of the concrete and shall be able to resist forces caused by vibration

of live load of men working over it and other incidental loads associated with it. The shuttering

shall have smooth and even surface and its joints shall not permit leakage of cement grout.

26.3 If at any stage of work during or after placing concrete in the structure, the form work

sags or bulges out beyond the required shape of the structure, the concrete shall be removed and

work redone with fresh concrete and adequately rigid form work. The complete form work shall

be got inspected by and got approved from the Engineer-in-charge, before the reinforcement bars

are placed in position.

26.4 The props shall consist of bullies having 100 mm. Minimum diameters measured at mix

length and 80 mm. At thin end and shall be placed as per design requirement. These shall rest

squarely on wooden sole plates 40 mm. Thick and minimum bearing area if 0-10 sq. M. Laid on

sufficiently hard base.

26.5 Double wedges shall further be provided between the sole plate and the wooden props so

as to facilitate tightening and easing of shuttering without jerking the concrete.The timber used

in shuttering shall not be so dry as to absorb water from concrete and swell or bulge nor so green

or wet as to shrink after erection. The timber shall be properly sawn and planed on the sides and

surface coming in contact with concrete. Wooden form work with metal sheet lining or steel

plates stiffened by steel angles shall be permitted.

26.6 As far as practicable, clamps shall be used to hold the forms together and use of nails and

spikes avoided.

26.7 The surface of timber shuttering that would come in contact with concrete shall be well

wetted and coated with soap solution before the concreting is done. Alternatively coat of raw

linseed oil or oil of approved manufacturer may be applied in place of soap solution. In case of

steel shuttering either soap solution or raw linseed oil shall be applied after thoroughly cleaning

the surface. Under no circumstances black or burnt oil shall be permitted.

The shuttering for beams and slabs shall have camber of 4 mm. Per meter (1 in 250) or as directed

by the Engineer-in-charge so as to offset the subsequent deflection. For cantilevers, the camber

at free end shall be 1/50 of the projected length or as directed by the Engineer-in-charge

DETAILED TECHNICAL SPECIFICATION

Item no.1 Clearing & grubbing road land including uprooting rank vegetation grass

bushes, shrubs, sapling and trees girth up to 300 mm removal of stumps of trees cut earlier

and disposal of unserviceable materials

(A) By manual means in area of light jungle.

This work shall consist of all clearing and grubbing necessary for the performance of the work covered

by the Contract in accordance with the Specifications. The clearing and grubbing shall in more detail

consist of clearing the designated areas of all trees, down timber, vegetation, rubbish and any other

objectionable materials and shall include grubbing roots and stumps and disposing of all material resulting

from the clearing and grubbing. It shall also include the demolition, removal and disposal of structures

that obtrude the Works except where provided for in Section 2.9. Clearing shall be confined to the areas

enclosed by the right-of-way limits. Grubbing shall be confined to areas covered by the Works.

2. Preservation of Property

Attention is directed to the Contractor’s obligations under the Contract with regard to damage, particularly

with regard to protection of property, gardens and landscape and to responsibility for damage claims.

Existing roads, improvements, facilities, adjacent property, utilities, services and trees and plants

designated for preservation shall be protected from injury or damage which could result from the

Contractor’s operations.

3. Construction Methods

Clearing shall consist of the removal and disposal of everything above ground level including

overhanging branches except those things the Engineer directs are to be left undisturbed. The material to

be cleared shall include but not necessarily be limited to trees, stumps, logs, brush, undergrowth, grass,

crops, loose vegetable matter and structures unless provided for elsewhere. Trees and stumps shall be cut

to ground level. Clearing shall also include the removal of existing fences, remnants of buildings and

courtyard pavements etc. The roadway and adjacent areas shall be left with a neat and finished

appearance. No accumulation of inflammable material shall remain on or adjacent to the right-of-way.

The original ground surface shall be disturbed as little as possible. Grubbing shall, therefore, be confined

to major roots beneath the embankment, ditches, canal diversions and footing excavations. In these areas

grubbing shall consist of the removal of all major stumps, embedded logs, tree roots and other material,

except as otherwise directed by the Engineer. Holes left shall be filled with suitable material compacted

to comply with Section 2.6 of the Specification with the cost of this being deemed to be included in the

rate for grubbing. Topsoil shall be removed as agreed with the Engineer and will be measured as roadway

excavation. Grubbing beneath the embankment shall be at the direction of the Engineer. In agricultural

areas where the ground has been formed into ridges or dikes, the ground shall be roughly levelled or

graded to form a surface suitable for embankment foundation to the satisfaction of the Engineer.

3.3 Ownership of Cleared Material

All cleared material shall, unless otherwise provided for in the Contract, be the property of the Employer.

Materials shall be stockpiled, or placed, by the contractor on site in a location agreed by the Engineer.

3.4 Existing Drainage

Existing ditches, drainage channels etc., shall be closed at the embankment foundation boundary except

where pipes or other structures are prescribed. Disused drains below embankments shall be removed and

trenches filled in accordance with Section 2.4. The Contractor is responsible for undertaking any

provisional drainage measures, including temporary watercourses and ditches, which may be necessary.

3.5 Measurement

Neither the work of clearing nor grubbing disposal sites, material sites, nor imported borrow pit sites shall

be paid for when such sites are outside the areas designated for clearing or grubbing and the Contractor

is permitted to exercise his own option as to whether he elects to use such disposal sites or borrow pit

Clearing and grubbing will be paid by area. The payment shall be full compensation for furnishing all

labour, materials, tools, equipment and incidentals necessary for the clearing and grubbing the designated

areas as specified in these Specifications or as directed by the Engineer including the removal and disposal

of all resulting material.

The rate shall be for a unit of one Hectare.

Item no.2 Excavation for foundation upto 1.5 m depth including sorting out and stacking

of useful materials and disposing off the excavated stuff upto 50 Meter lead. (A) Loose or

1.1 Any soil which generally yields to the application of pickaxes and shovels, phawaras, rakes

or any such ordinary Excavating implement or organic soil, gravel, silt, sand turf loam, clay, peat

etc. Fall under this category.

2.0 Clearing the site:

2.1 The site on which the structure is to be built shall be cleared and all obstructions, loose stone,

materials And rubbish of all kind, bush, wood and trees shall be removed as directed. The

materials so obtained shall be properly of the Government and be conveyed and stacked as

directed within 50 M. Lead. The roots of the trees coming in the sides shall be cut and Coated

with a hot asphalt.

2.2 The rate of site clearance is deemed to be included in the rate of earth work for which no

extra will be paid.

3.0 Setting out : After clearing the site, the centerlines will be given by the Engineer-in-charge.

The contractor shall assume full Responsibility for alignment, elevation and dimension of each

and all parts of the tractor shall assume full responsibility for alignment Elevation and dimension

of each and all parts of the work. Contractor shall supply laborers, materials, etc. Required for

setting out the Reference marks and bench marks and shall maintain them as long as required

4.0 Excavation: The excavation in foundation shall be carried out in true line and level and shall

have the width and depth as shown In the drawings or as directed. The contractor shall do the

necessary shoring and shutting or providing necessary slopes to a safe angle, At his own cost.

The payment for such precautionary measures shall be paid separately if not specified. The

bottom of the excavated Area shall be 1evelled both longitudinally and transversely as directed

by removing and watering as required. No earth filling will be Allowed for bringing it to level,

if by mistake or any other reason excavation is madedeeper or wider that shown on the plan or

directed. The extra depth or width shall be made up with concrete of same proportion as

specified for the foundation concrete at the cost of the contractor. The excavation up to 1.5 m.

Depth shall be measured under This item.

5.0 Disposal of the excavated stuff :

5.1 The excavated stuff of the selected type shall be used in filling the trenches and plinth or

Leveling the ground in layers including ramming and watering etc.

5.2 The balance of the excavated quantity shall be removed by the contractor from the site of

work to a place as directed with lead up to 50 M. And all lift.

6.0 Mode of measurement and payment:

6.1 The measurement of excavation in trenches for foundation shall be made according to the

sections of trenches shown on the drawing or as per sections given by the Engineer-in-charge.

No payment shall be made for surplus excavation made in excess of above requirements or due

to slopping back as found necessary on account of conditions of soil and requirements of safety.

6.2 The rate shall be for a unit of one cubic meter.

Item no.3 Excavation for foundation upto 1.5 m depth including sorting out and stacking

of useful materials and disposing off the excavated stuff upto 50 Meter lead. (B) Dense or

1.0 Dense or Hard Soil : Any soil which generally require close application of picks or jumpers

or scarifiers to loosen it stiff clay, gravel and rubbee stone etc. Fall under this category.

2.0 Workmanship: The relevant specification of item no. 2 shall be followed

except that the excavation work shall be carried out in dense or hard soil.

3.0 Mode of measurement and payment :

3.1 The relevant specification of item No. 2 shall be followed.

3.2 The rate shall be for a unit of one cubic meter.

Item no.4 Excavation for foundation upto 1.5 m depth including sorting out and stacking

of useful materials and disposing off the excavated stuff upto 50 Meter lead.(D) Soft rock

not requiring Blasting

1.0 Workmanship :

1.1 The relevant specification of item No. 2 shall be followed except that the excavation

shall be carried out for foundation upon 1.5 m. Lift in soft-rock not requiring blasting.

1.2 The excavation in soft or disintegrated rock shall be carried out by crow bards, pickaxes

or pneumatic drills or any other suitable means.

1.3 If contractor desires to resort to blasting, he can do so with permission of the Engineer-

in-charge but nothing extra shall be paid to him.

1.4 The materials available from soft rock excavation shall be properly stacked within 50 m.

Lead and 1.5 m. Lift and shall be the properly of department.

1.5 The classification of strate of the foundation soil shall be done by the Engineer-in-charge

and shall be acceptable to the Contractor.

1.6 However this shall include the type of rock and boulder which may quarried or split

with crow bars. Laterite and congromerate also come under this category.

2.0 Mode of measurement and payment :

2.1The relevant specification of item No. 2 shall be followed.

2.2The rate shall be for a unit of one cubic meter.

Item no.5 Excavation for foundation for depth from 1.5 m to 3.0 m including sorting out

and stacking of useful materials and disposing off the excavated stuff upto 50 Meter

lead.(B) Dense or Hard soil

1.0 Workmanship: 1.1 The relevant specifications of item No.2 shall be followed except

that the excavation work shall be Carried out from 1.5m to 3.0 m. Lift in Dense or Hard soil.

2.0 Mode of measurement and payment :

2.1 The relevant specification of item No.2 shall be followed.

2.2 The excavation work from 1.5 m to 3.0 m. Shall be measured under this item.

2.3 The rate shall be for a unit of one cubic meter.

Item no.6 Excavation for foundation for depth from 1.5 m to 3.0 m including sorting out

and stacking of useful materials and disposing off the excavated stuff upto 50 Meter

lead.(D) Soft rock not requiring Blasting

1.0 Workmanship :

1.7 The relevant specification of item No. 2 shall be followed except that the excavation shall

be carried out for foundation upon 1.5 m to 3.0 m. Lift in soft-rock not requiring blasting.

1.8 The excavation in soft or disintegrated rock shall be carried out by crow bards, pickaxes

or pneumatic drills or any other suitable means.

1.9 If contractor desires to resort to blasting, he can do so with permission of the Engineer-

in-charge but nothing extra shall be paid to him.

1.10 The materials available from soft rock excavation shall be properly stacked within 50 m.

Lead and 1.5 m. Lift and shall be the properly of department.

1.11 The classification of strate of the foundation soil shall be done by the Engineer-in-charge

and shall be acceptable to the Contractor.

1.12 However this shall include the type of rock and boulder which may quarried or split

with crow bars. Laterite and congromerate also come under this category.

2.0 Mode of measurement and payment :

2.1 The relevant specification of item No. 2 shall be followed.

2.2 The rate shall be for a unit of one cubic meter.

Item no.7 Filling available excavated earth (excluding rock) in trenches, plinth, sides of

foundations etc. in layers not exceeding 20 cm. In depth consolidating each deposited layer

by ramming and watering.

1.0 Workmanship :

1.1 The earth to be used for filling shall be free from salts, organic or other foreign matter.

All clods of earth shall be broken.

1.2 As soon as the work in foundation has been completed and measured, the site of

foundation shall be cleared of all debris, brick bats, mortar dropping etc; and filled with earth in

layers not exceeding 20 Cms. Each layer shall be adequately watered, remmed and consolidated

before the succeeding layer is laid. The earth shall be rammed with iron rammers where feasible

and with the butt ends of crow-bars, where rammer cannot be used.

1.3 The plinth shall be similarly filled earth in layers not exceeding 20 Cms. Adequately

watered and consolidated by ramming with iron or wooden rammers. When filling reaches

finished level the surface shall be flooded with water for atleast 24 hours and allowed to dry and

then rammed and consolidated.

1.4 The finished level of filling shall be kept to shape intended to be given to floor.

1.5 In case of large heavy duty flooring like factory flooring the consolidation may be done

by power rollers, where so specified. The extent of consolidation required shall also be as

1.6 The excavated stuff of the selected type shall be allowed to be used in filling the trenches

and plinth. Under no circumstances black cotton soil be used for filling the plinth.

2.0 Mode of measurement and payment :

2.1 The payment shall be made for filling in plinth and trenches. No deduction shall be made

for shrinkage or voids, if consolidated as instructed above.

2.2 The rate shall be for a unit of one cubic meter.

2.3 Filling in plinth with sand under floors including watering, ramming consolidating and

Item no. 8 Filling in foundation and plinth with murrum or selected soil in layers of 20cm.

thickness including watering, ramming and consolidating etc. complete. (upto 10 ton)

1.0 Workmanship :

1.1 The earth to be used for filling shall be free from salts, organic or other foreign matter.

All clods of earth shall be broken

1.2 As soon as the work in foundation has been completed and measured, the site of

foundation shall be cleared of all debris, brick bats, mortar dropping etc; and filled with earth in

layers not exceeding 20 Cms. Each layer shall be adequately watered, remmed and consolidated

before the succeeding layer is laid. The earth shall be rammed with iron rammers where feasible

and with the butt ends of crow-bars, where rammer cannot be used.

1.3 The plinth shall be similarly filled earth in layers not exceeding 20 Cms. Adequately

watered and consolidated by ramming with iron or wooden rammers. When filling reaches

finished level the surface shall be flooded with water for atleast 24 hours and allowed to dry and

then rammed and consolidated.

1.4 The finished level of filling shall be kept to shape intended to be given to floor.

1.5 In case of large heavy duty flooring like factory flooring the consolidation may be done

by power rollers, where so specified. The extent of consolidation required shall also be as

1.6 The excavated stuff of the selected type shall be allowed to be used in filling the trenches

and plinth. Under no circumstances black cotton soil be used for filling the plinth.

2.0 Mode of measurement and payment :

2.1 The payment shall be made for filling in plinth and trenches. No deduction shall be made

for shrinkage or voids, if consolidated as instructed above.

2.2 The rate shall be for a unit of one cubic meter.

2.3 Filling in plinth with sand under floors including watering, ramming consolidating and

dressing etc. Complete.

Item no. 9 Rolling of earthwork in layers with power roller including filling in depressions

which occur during the process. (upto 10 ton)

For spreading materials in layers and bringing the appropriate moisture content, the embankment

materials shall be spread uniformly over the entire width of the embankment in layers not

exceeding 250mm in loose thickness. Successive layers of embankment shall not be placed until

the layer under construction has been thoroughly compacted to the requirements set down here

Moisture content of the materials shall be checked at the source of supply and if found less than

that Specified for compaction, the same, shall be made good either at the source or after spreading

the soil in loose thickness for compaction. In the latter case, water shall be sprinkled directly

from a hoseline or from a truck mounted water tank, and flooding shall not be permitted under

any circumstances.

If the materials delivered to the road bed is too wet it shall be dried, by evaporation and exposure

to the sun. Till the moisture content is brought doen to acceptable standard for compaction.

Should circumstances arise. Where owing to wet weather, the moisture content cannot be

reduced to the required level by the above procedure; work of compaction shall be suspended.

Moisture content of each layer of soil shall be checked in accordance with 1ST 2720 (Part-11)

and unless Otherwise mentioned shall be so adjusted, making due allowance for evaporation

losses, that at the time of the compaction it is in the range of 1 percent to 2 percent below th

optimum moisture content determined in accordance with ISI (Part-VII). Highly expansive clays

shall however be compacted at 2 to 4 percent above the optimum moisture content.

After adding the required amount of water, the soil shall be processed by means of harrows,

rotary mixers or as otherwise approved until the layer is uniformly wet.

Clods or hard lumps of earth shall be broken to have maximum size of 150mm when being placed

in the Lower layers of the embankment and a maximum size of GOmrn when being placed in

the top 0.5 meter portion of the embankment below the subgrade.

Hauling equipment shall be dispersed uniformly over entire surface of the previously constructed

layer to Minimize cutting of uneven compaction. Where the embankment is to be constructed on

low area ground that will not support the weight of trucks Of other hauling equipment, the lower

part of the fill should be constructed by dumpting successive loads in uniformly distributed layers

of a thickness not greater than that necessary to support the hauling equipment while placing

subsequent layers.

2. COMPACTION: Only compacting equipment approved by the Engineer-in-charge shall be

employed to Compact the materials. The contractor shall demonstrate the efficiency of the plants

he intends to use for carrying out compaction trials.

Each layer of the materials shall be thoroughly compacted to the densities specified in Table

Table 1.2 Compaction requirements for embankment.

Sr.No Type of Work/materials Field dry density as per centage of maximum

No. laboratory dry density as per IS:2720

1 Top 0.5 meter portion of Not less than

embankment below subgrade level

2 Other portion of embankment Not less than

3 Highly expensive class 85 to

Subsequent layers shall be placed only after finished layer has been tested according to M.O.S.T.

Specification clause 902 and accepted by the Engineer-in-charge.

When density measurements reveal any soft areas in the embankment further compaction shall

be carried out as directed by the Engineer-in-charge. If insite of that the specifcated compaction

is not achieved, the materials in the soft areas shall be removed and replaced by approved

materials and compacted to the density requirement. to the satisfaction of the Engineer-in-charge.

3. Measurements for Payment: Consolidation of earth embankment construction shall be

measured by taking cross section at intervals in the original position before the work starts and

after its completion and Computing of the volume of earthwork in cubic meters by the method

of average and areas. The measurement of fill material from borrow are a shall be the difference

between the net quantities of suitable materials brought from roadway and drainage excavation.

For this purpose it shall be assumed that one cubic meter of suitable materials brought to site

from roadway and drainage excavation from one cubic meter of compacted fill and alt bulking

or shrinkage shall Tie ignored. Stripping including storing and reapplication of top soil shall be

measured as volume in cubic meter.

4. The contract unit rate includes cost of mechanical roller required for consolidation including

ail labour, equipments fuel; hire charges, tolls, and incidentals necessary.

Item no. 10 Providing and laying cement concrete 1:3:6 (1-Cement : 3- coarse sand : 6-

hand broken stone aggregates 40 mm nominal size) and curing complete excluding cost of

formwork in (A) Foundation and Plinth (upto 10 ton)

1.1 Materials: Water shall conform to M-1. Sand shall conform to M-6. Cement shall conform

to M-3. Stone aggregate 20 mm. Nominal size shall conform to M-12.

2.0 Workmanship :

2.1.1 before starting concrete bed of foundation teaches shall be cleared of all loose materials,

leveled, watered and rammed as directed.

2.2 Proportion of Mix: 2.2.1 The Proportion of cement, sand and coarse aggregate shall be one

part of cement, 3 parts of sand, 6 parts of stone aggregates and shall so measure by volume.

2.3.1 The concrete shall be mixed in a mechanical mixer at the site of work. Hand mixing may

however be allowed for smaller quantity of work if approved by the Engineer-in-charge. When

hand mixing is permitted by the Engineer-in-charge in case of break-down of machineries and

in the interest of the work, it shall be carried out on a water tight platform and care shall be taken

to ensure that mixing is continued until the mass in uniform in color and consistency. However

in such cases 10% more cement than otherwise required shall have to be used without any extra

cost. The mixing in mechanical mixer shall be done for a period 1 to 2 minutes. The quantity of

water shall be sufficient to produce a dense concrete of required workability for the purpose.

2.4 Transporting & Placing the concrete :

2.4.1 The concrete shall be handled from the place of mixing to the final position in not more

than 15 minutes by the method as Directed and shall be placed into its final position, compacted

and finished within 30 minutes of mixing with water i.e. Before the setting commences.

2.4.2 The concrete shall be laid in layers of 15 cms. To 20 cms.

2.5 Compacting : 2.5.1 The concrete shall be rammed with heavy iron rammers and rapidly to

get the required compaction and to Allow all the interstices to be filled with mortar.

2.6 Curing : 2.6.1 After the final set, the concrete shall be kept continusoly wet, if required by

pounding for a period of not less than 7 days from the date of placement.

2.7 Mode of measurement and Payment :

2.7.1 The concrete shall be measured for its length breadth and depth, limiting dimensions to

those specified on plan or as directed.

2.7.2 The rate shall be for a unit of one cubic meter.

Item no. 11 Providing and laying controlled cement concrete M.250 and curing complete

excluding the cost of formwork and reinforcement for reinforced concrete work in (A)

Foundations, footings, Base of columns and Mass concrete. (upto 10 ton)

1.1 Water shall conform to M-1. Cement shall conform to M-3. Sand shall conform to M-6.

Aggregate of normal size shall conform to M-12.

2.0 Specification:

2.1 The relevant specifications of above item no.5, of ordinary concrete shall be followed

except that the concrete mix shall be designed from preliminary tests, the proportioning of

cement and aggregates shall be done by weight or 1:1:2 and necessary precautions shall be taken

in the production to ensure that the required work cube strength is attained and maintained . The

controlled concrete shall be in grades of M-100, M-150, M-200, M-250, M-300, M-350 & M-

400 with prefix controlled added to it. The letter ‘M’ refers to mix and numbers specify 28 days

works cube compressive strength. Cubes of the mix expressed in Kg./Cmt.

2.2 The proportion of cement sand and coarse aggregates shall be determined by weight, the

weight batch machine shall be used for maintaining proper control over the proportion of

aggregates as per mix design. Minimum cement consumption for design mix concrete shall be

considered as per mix design done by agency or relevant booklet of PWD.

The strength requirements of different grades of concrete shall be as under :

Grade of Concrete Compressive strength of Cubes in Kg./Cmt. At with

15 cms.x 15 cm 28 days I. S. 516-1959.

conducted in accordance Min.

Preliminary test Work test

In all cases the 28 days compressive strength specified in above table the criteria for acceptance

or rejection of the concrete.

Where the strength of a concrete mix as indicated by tests, line in between the strength of any

two grades specified in the above table, such concrete shall be classified in for all purpose as

concrete belonging to the lower of the two grades between which its strength lies.

3.1 The water cement ratio shall not more than those specified in Design mix. The cement

content of the mix specified shall be increased if the quantity of water in a mix has to be increased

to overcome the difficulties of placement and compaction so that the water-cement-ratio

specified is not exceeded.

3.2 Workability of the concrete shall be controlled by maintaining a water-cement-ratio that is

bound to give a concrete mix which is just sufficiently wet to be placed and compacted without

difficulty with the means available.

3.3 For reinforced concrete work, coarse aggregates having a nominal size of 20 mm. Are

generally considered satisfactory.

3.4 Admixture may be used in concrete only with approval of Engineer-in-charge upon the

evidence that with the passage of time, neither the compressive strength of concrete is reduced

nor are other requisite qualities of concrete and steel impaired by the use of such admixtures.

4.0 Workmanship:

4.1 The proportions for ingredients chosen shall be such that concrete has adequate workability

for conditions prevailing on the work in question and can be properly compacted with means

available except where it can be shown to the satisfaction of the Engineer-in-charge that the

supply of properly graded aggregate of uniform quality can be maintained till the completion of

work. Grading of aggregate shall be controlled by obtaining the coarse aggregates in different

sizes and mixing them in the right proportions as required. Aggregate of different sizes shall be

stocked in separate stockpiles. The required quantity of material shall be stock piled several

hours, preferably a day before use. The grading of coarse and fine aggregate shall be checked as

frequently as possible the frequency for a given job being determined by the Engineer-in-charge

to ensure that the suppliers are maintaining the uniform grading as approved for samples used in

the preliminary tests.

4.2 In proportioning concrete the quantity of both cement and aggregate shall be determined by

weight. Where the weight of cement is determined by accepting the maker’s weight per bag a

reasonable number of bags shall be weighted separately to check the net weight. Where cement

is weighted from bulk stocks at site and not by bags it shall be weighted separately from the

aggregates. Water shall either be measured by volume in calibrated tanks or weighed. All

measuring equipments shall be maintained in clean and serviceable condition. Their accuracy

shall be periodically checked.

4.3 It is most important to keep the specified water cement ratio constant and at its correct value.

To this end moisture content in both fine and coarse aggregates shall be determined by the

Engineer-in-charge according to the weather conditions the amount of mixing water shall then

be adjusted to compensate for variations in the moisture content. For the determination of

moisture content in the aggregates I. S. 2389 (Part-III) shall be referred to suitable adjustments

shall also be made in the weights of aggregates due to variation in their moisture content.

5.1 For all work. Concrete shall be mixed in a mechanical mixer which along with other

accessories shall be kept in first class working condition and so maintained throughout the

construction. Measured quantity of aggregate, sand, cement required for each batch shall be

poured into the drum of the mechanical mixer while it is continuously running. After about half

a minute of dry mixing, measured quantity of water required for each batch of concrete mix shall

be added gradually and mixing continued for another one and a half minute. Mixing shall be

continued till materials are uniformly distributed and uniform color of the entire mass is obtained

and each individual particle of the coarse aggregate shows complete coating of mortar containing

its proportionate amount of cement. In no case shall the mixing be done for less than 2 minutes

after all ingredients have been put into the mixer.

5.2 When hand mixing is permitted by the Engineer-in-charge for small jobs or for certain other

reasons, it shall be done on the smooth watertight platform large enough to allow efficient turning

over the ingredients of concrete before and after adding water. Mixing platform shall be so

arranged that no foreign materials get mixed with concrete nor does the mixing water flow out.

Cement in required number of bags shall be placed in a uniform layer on top of the measured

quantity of fine and coarse aggregate, which shall also be spread in a layer of uniform thickness

on the mixing platform. Dry coarse and fine aggregate and cement shall then be mixed

thoroughly by turning over to get a mixture to uniform color. Specified quantity of water shall

then be added gradually through a rose-can and the mass turned over till a mix of required

consistency is obtained. In hand mixing, quantity of cement shall be increased by 10 percent

above that specified.

5.3 Mixers which have been out of use for more than 30 minutes shall be thoroughly cleaned

before putting in a new batch. Unless otherwise agreed to by the Engineer-in-charge the first

batch of concrete from the mixture shall contain only two thirds of normal quantity of coarse

aggregate. Mixing plant shall be thoroughly cleaned before changing from one type of cement

6.0 Consistency:

6.1The degree of consistency which shall depend upon the nature of the work and methods of

vibration of concrete, shall be determined by regular slumps tests in accordance with I. S. 1199-

1959. The slumps of 100 mm. To 125 mm. shall be adopted when vibrators are used and 80 mm.

When vibrators are not used.

7.0 Inspection :

7.1 Contractor shall give the Engineer-in-charge due notice before placing any concrete in

the forms to permit him to inspect and accept the false work and forms as to their strength,

alignment, and general fitness but such inspection shall not relive the contractor of his

responsibility for the safety of men, machinery, materials and for results obtained. Immediately

before concreting, all forms shall be thoroughly cleaned.

7.2 Centering design and its erection shall be got approved from the Engineer-in-charge. One

carpenter with helper shall invariably be kept present throughout the period of concreting.

Movement of labor and other persons shall be totally prohibited for reinforcement laid in

position. For access to different parts, suitable mobile platforms shall be provided so that steel

reinforcement in position is not disturbed for ensuring proper cover; mortar blocks of suitable

size shall be cast and tied to the reinforcement. Timber, kapachi or metal pieces shall not be used

for this purpose.

8.0 Transporting and laying:

8.1 The method of transporting and placing concrete shall be as approved. Concrete shall be so

transported and placed that no contamination, segregation or loss of its constituent material takes

All formwork shall be cleaned and made free from standing water, dust show or ice immediately

before placing of concrete.

No concrete shall be placed in any part of the structure until the approval of the Engineer-in-

charge has been obtained.

8.2 Concerting shall proceed continuously over the area between construction joints. Fresh

concrete shall not be placed against concrete which has been in position for more than 30 minutes

unless a proper construction joints is formed. Concrete shall be compacted in its final position

within 30 minutes of its discharge from the mixer. Except where otherwise agreed to by the

Engineer-in-charge concrete shall be deposited shall be deposited in horizontal layers to a

compacted depth of not more than 0.45 meter when internal vibrators are used and not exceeding

0.30 meter in all other cases.

8.3 Unless otherwise agreed to by the Engineer-in-charge, concrete shall not be dropped into

place from a height exceeding 2 meters. When trucking or chutes are used they shall be kept

close and used in such a way as to avoid segregation. When concreting has to be resumed on a

surface which has hardened, it shall be roughened, swept clean, thoroughly wetted and covered

with a 13 mm. Thick layer of mortar composed of cement and sand in the same ratio as in the

concrete mix itself. This 13 mm. Layer of mortar shall be freshly mixed and placed immediately

before placing of new concrete. Where concrete has not fully hardened, all laitance shall be

removed by scrubbing the wet surface with wire or bristle brushes, care being taken to avoid

dislodgement of any particles of coarse aggregate. The surface shall then be thoroughly wetted

all free water removed and then coated with neat cement grout. The first layer of concrete to be

placed on his surface shall not exceed 150 mm. In thickness and shall be well rammed against

old work, particular attention being given to corners and close spots.

8.4 All concrete shall be compacted to produce a dense homogeneous mass with the assistance

of vibrators, unless otherwise permitted by the Engineer-in-charge for exceptional cases, such as

concreting under water, where vibrators cannot be used. Sufficient vibrators in serviceable

condition shall be kept at site so that spare equipment is always available in the event of

Concrete shall be judged to be compacted when the mortar fills the spaces between the coarse

aggregate and begins to cream up to form an even surface. Compaction shall be completed before

the initial setting starts i.e. Within 30 minutes of addition of water to dry mixture. During

compaction, it shall be observed that needle vibrators are not applied on reinforcement which is

likely to destroy the bond between concrete and reinforcement.

Immediately after compaction, concrete shall be protected from weather, including rain, running

water, shocks, vibration, traffic, rapid temperature changes, frost and drying out process. It shall

be covered with wet sacking, hassain or other similar absorbant material approved soon after the

initial set and shall be kept continuously wet for a period of not less than 14 days from the date

of placement. Masonry work over foundation concrete may be started after 48 hours of its laying

but curing of concrete shall be continued for a minimum period of 14 days.

10.0 Sampling and Testing of concrete:

10.1 Samples from fresh concrete shall be taken as per I. S. 1199-1959 and cubes shall be

made, cured and tested at 7 days or 28 days as per requirements in accordance with I. S. 516-

1959. A random sampling procedure shall be adopted to ensure that each concrete batch shall

have a reasonable chance of being tested i.e. The sampling should be spread over the entire period

of concreting and cover all mixing units. The minimum frequency of sampling of concrete of

each grade shall be in accordance with following :

Quantity of No. Of samples Quantity of No. Of samples

concrete in the concrete in the

51 cmt and above + one additional for each additional 50 cmt. Or part thereof.

NOTE : At least one sample shall be taken from each shift. Ten test specimens shall be made

from each sample, five for testing at 7 days and the remaining five at 28 days. The samples of

concrete shall be taken on each day of the concreting as per above frequency. The number of

specimens may be suitably increased as deemed necessary by the Engineer-in-charge when

procedure of tests given above revels a poor quality of concrete and in other special cases.

10.2 The average strength of the group of cubes case for each day shall not be less than the

specified cube strength of 250 kg/Cm2 at 28 days. 20% of the cubes cast for each day may have

value less than the specified strength provided the lowest value is not less than 85% of the

specified strength. If the concrete made in accordance with the proportions given for a particular

grade, does not yield the specified strength, such concrete shall be classified as belonging to the

appropriate lower grade. Concrete made in accordance with the proportions given for a particular

grade shall not however, be placed in a higher grade on the ground that the test strength are

higher than the minimum specified.

11.0 Stripping :

11.1 The Engineer-in-charge shall be informed in advanced by the contractor of his intention to

strike the form work. While fixing the time for removal of form work due consideration shall be

given to local conditions, character of the structure the weather and other condition that influence

the setting of concrete and of the materials used in the mix in normal circumstances (generally

where temperatures are above 20ºc) and where ordinary concrete is used forms may be struck

after expiry of periods specified in item No. 9.1 (A) for respective item of form work.

a. All formwork shall be removed without causing any shock or vibration as would damage

the concrete. Before the soffits and struts are removed the concrete surface shall be exposed

where necessary in order to ascertain that the concrete has sufficiently hardened. Centering shall

be gradually and uniformly lowered in such manner as to permit the concrete to take stresses due

to its own weight uniformly and gradually. Where internal metal ties are permitted they or their

removable parts shall be extracted without causing any damage to the concrete and remaining

holes filled with mortar. No permanently embedded metal part shall have less than 25 mm. Cover

to the finished concrete surface. Where it is intended to re-use the formwork, it shall be cleaned

and made good to the satisfaction of the Engineer-in-charge. After removable of form work and

shuttering the Executive Engineer shall inspect the work and satisfy by random checks that

concrete produced is of good quality.

b. Immediately after the removal of forms all exposed bolts etc., passing through the cement

concrete member and use for shuttering or any other purpose shall be cut inside the cement

concrete members to a depth of at least 25 mm. Below the surface of the concrete and the

resulting holes be filled by cement mortar. All fine caused by form joints, all cavities produced

by the removal of forms ties and all other holes and depressions honeycomb spots broken edges

or corners and other defects shall be thoroughly cleaned, saturated with water and carefully

pointed and rendered true with mortar of cement and fine aggregate mixed in the proportion used

in the grade of concrete that is being finished and of as dry consistency as is possible to use.

Considerable pressure shall be applied in filling and pointing to ensure through filling in all

voids. Surfaces which are pointed shall be kept moist for a period of 24 hours.

If rock pockets honeycombs in the opinion of the Engineer-in-charge are of such an extent or

character as to affect the strength of the structure materially or to endanger the life of the steel

reinforcement he may declare the concrete defective and require the removal and replacement of

the portions of the structure affected.

12.0 Mode of measurement and payment:

12.1 The consolidated cubical contents of concrete work as specified in item shall be measured

the concrete laid in excess of section shown on drawings or as directed shall not be measured.

No deduction shall be made for

(a) Ends of dis-similar materials such as joints, beams, posts, girders, rafters, purling trusses,

corbels and steps etc Up to 500 Sq Cm In section.

(b) Opening up to 0.1 Sq. M.

12.2 The rate includes cost of all materials, labor, tools and plant required for mixing,

placing in position, vibrating and compacting, finishing as directed curing and all other

incidental expenses for producing concrete of specified strength. Rate is inclusive form work.

12.3 The rate shall be for a unit of one cubic meter.

Item no. 12 Providing and laying controlled cement concrete M.250 and curing complete

excluding the cost of formwork and reinforcement for reinforced concrete work in (B)

Walls, from top of foundation level upto floor two level (upto 10 ton)

1.0 Materials & Workmanship:

1.1 The relevant specifications of the item No.6 shall be followed for controlled concrete work

for work as specified in item for M250 or 1:1:2 and relevant specifications of item 11 Shall be

followed for Walls, from top of foundation level upto floor two level..

2.0 Mode of measurements and payment:

1.1 The rate shall be for a unit of one cubic meter. The rate shall include the cost of form work

of steel sheets.

Item no.13 Providing and laying controlled cement concrete M.200 or ( 1 : 1.5 : 3 ) and

curing complete including the cost of formwork and excluding reinforcement for

reinforced concrete work in (A) Foundations, footings, Base of columns and Mass concrete.

1.1 Water shall conform to M-1. Cement shall conform to M-3. Sand shall conform to M-6.

Aggregate of normal size shall conform to M-12.

2.0 Specification:

2.1 The relevant specifications of above item no.5, of ordinary concrete shall be followed

except that the concrete mix shall be designed from preliminary tests, the proportioning of

cement and aggregates shall be done by weight or 1:1:2 and necessary precautions shall be taken

in the production to ensure that the required work cube strength is attained and maintained . The

controlled concrete shall be in grades of M-100, M-150, M-200, M-250, M-300, M-350 & M-

400 with prefix controlled added to it. The letter ‘M’ refers to mix and numbers specify 28 days

works cube compressive strength. Cubes of the mix expressed in Kg./Cmt.

2.2 The proportion of cement sand and coarse aggregates shall be determined by weight, the

weight batch machine shall be used for maintaining proper control over the proportion of

aggregates as per mix design. Minimum cement consumption for design mix concrete shall be

considered as per mix design done by agency or relevant booklet of PWD.

The strength requirements of different grades of concrete shall be as under :

Grade of Concrete Compressive strength of Cubes in Kg./Cmt. At with

15 cms.x 15 cm 28 days I. S. 516-1959.

conducted in accordance Min.

Preliminary test Work test

In all cases the 28 days compressive strength specified in above table the criteria for acceptance

or rejection of the concrete.

Where the strength of a concrete mix as indicated by tests, line in between the strength of any

two grades specified in the above table, such concrete shall be classified in for all purpose as

concrete belonging to the lower of the two grades between which its strength lies.

3.1 The water cement ratio shall not more than those specified in Design mix. The cement

content of the mix specified shall be increased if the quantity of water in a mix has to be increased

to overcome the difficulties of placement and compaction so that the water-cement-ratio

specified is not exceeded.

3.2 Workability of the concrete shall be controlled by maintaining a water-cement-ratio that is

bound to give a concrete mix which is just sufficiently wet to be placed and compacted without

difficulty with the means available.

3.3 For reinforced concrete work, coarse aggregates having a nominal size of 20 mm. Are

generally considered satisfactory.

3.4 Admixture may be used in concrete only with approval of Engineer-in-charge upon the

evidence that with the passage of time, neither the compressive strength of concrete is reduced

nor are other requisite qualities of concrete and steel impaired by the use of such admixtures.

4.0 Workmanship:

4.1 The proportions for ingredients chosen shall be such that concrete has adequate workability

for conditions prevailing on the work in question and can be properly compacted with means

available except where it can be shown to the satisfaction of the Engineer-in-charge that the

supply of properly graded aggregate of uniform quality can be maintained till the completion of

work. Grading of aggregate shall be controlled by obtaining the coarse aggregates in different

sizes and mixing them in the right proportions as required. Aggregate of different sizes shall be

stocked in separate stockpiles. The required quantity of material shall be stock piled several

hours, preferably a day before use. The grading of coarse and fine aggregate shall be checked as

frequently as possible the frequency for a given job being determined by the Engineer-in-charge

to ensure that the suppliers are maintaining the uniform grading as approved for samples used in

the preliminary tests.

4.2 In proportioning concrete the quantity of both cement and aggregate shall be determined by

weight. Where the weight of cement is determined by accepting the maker’s weight per bag a

reasonable number of bags shall be weighted separately to check the net weight. Where cement

is weighted from bulk stocks at site and not by bags it shall be weighted separately from the

aggregates. Water shall either be measured by volume in calibrated tanks or weighed. All

measuring equipments shall be maintained in clean and serviceable condition. Their accuracy

shall be periodically checked.

4.3 It is most important to keep the specified water cement ratio constant and at its correct value.

To this end moisture content in both fine and coarse aggregates shall be determined by the

Engineer-in-charge according to the weather conditions the amount of mixing water shall then

be adjusted to compensate for variations in the moisture content. For the determination of

moisture content in the aggregates I. S. 2389 (Part-III) shall be referred to suitable adjustments

shall also be made in the weights of aggregates due to variation in their moisture content.

5.1 For all work. Concrete shall be mixed in a mechanical mixer which along with other

accessories shall be kept in first class working condition and so maintained throughout the

construction. Measured quantity of aggregate, sand, cement required for each batch shall be

poured into the drum of the mechanical mixer while it is continuously running. After about half

a minute of dry mixing, measured quantity of water required for each batch of concrete mix shall

be added gradually and mixing continued for another one and a half minute. Mixing shall be

continued till materials are uniformly distributed and uniform color of the entire mass is obtained

and each individual particle of the coarse aggregate shows complete coating of mortar containing

its proportionate amount of cement. In no case shall the mixing be done for less than 2 minutes

after all ingredients have been put into the mixer.

5.2 When hand mixing is permitted by the Engineer-in-charge for small jobs or for certain other

reasons, it shall be done on the smooth watertight platform large enough to allow efficient turning

over the ingredients of concrete before and after adding water. Mixing platform shall be so

arranged that no foreign materials get mixed with concrete nor does the mixing water flow out.

Cement in required number of bags shall be placed in a uniform layer on top of the measured

quantity of fine and coarse aggregate, which shall also be spread in a layer of uniform thickness

on the mixing platform. Dry coarse and fine aggregate and cement shall then be mixed

thoroughly by turning over to get a mixture to uniform color. Specified quantity of water shall

then be added gradually through a rose-can and the mass turned over till a mix of required

consistency is obtained. In hand mixing, quantity of cement shall be increased by 10 percent

above that specified.

5.3 Mixers which have been out of use for more than 30 minutes shall be thoroughly cleaned

before putting in a new batch. Unless otherwise agreed to by the Engineer-in-charge the first

batch of concrete from the mixture shall contain only two thirds of normal quantity of coarse

aggregate. Mixing plant shall be thoroughly cleaned before changing from one type of cement

7.0 Consistency:

6.1The degree of consistency which shall depend upon the nature of the work and methods of

vibration of concrete, shall be determined by regular slumps tests in accordance with I. S. 1199-

1959. The slumps of 100 mm. To 125 mm. shall be adopted when vibrators are used and 80 mm.

When vibrators are not used.

7.0 Inspection :

7.1 Contractor shall give the Engineer-in-charge due notice before placing any concrete in

the forms to permit him to inspect and accept the false work and forms as to their strength,

alignment, and general fitness but such inspection shall not relive the contractor of his

responsibility for the safety of men, machinery, materials and for results obtained. Immediately

before concreting, all forms shall be thoroughly cleaned.

7.3 Centering design and its erection shall be got approved from the Engineer-in-charge. One

carpenter with helper shall invariably be kept present throughout the period of concreting.

Movement of labor and other persons shall be totally prohibited for reinforcement laid in

position. For access to different parts, suitable mobile platforms shall be provided so that steel

reinforcement in position is not disturbed for ensuring proper cover; mortar blocks of suitable

size shall be cast and tied to the reinforcement. Timber, kapachi or metal pieces shall not be used

for this purpose.

8.0 Transporting and laying:

8.1 The method of transporting and placing concrete shall be as approved. Concrete shall be so

transported and placed that no contamination, segregation or loss of its constituent material takes

All formwork shall be cleaned and made free from standing water, dust show or ice immediately

before placing of concrete.

No concrete shall be placed in any part of the structure until the approval of the Engineer-in-

charge has been obtained.

8.2 Concerting shall proceed continuously over the area between construction joints. Fresh

concrete shall not be placed against concrete which has been in position for more than 30 minutes

unless a proper construction joints is formed. Concrete shall be compacted in its final position

within 30 minutes of its discharge from the mixer. Except where otherwise agreed to by the

Engineer-in-charge concrete shall be deposited shall be deposited in horizontal layers to a

compacted depth of not more than 0.45 meter when internal vibrators are used and not exceeding

0.30 meter in all other cases.

8.3 Unless otherwise agreed to by the Engineer-in-charge, concrete shall not be dropped into

place from a height exceeding 2 meters. When trucking or chutes are used they shall be kept

close and used in such a way as to avoid segregation. When concreting has to be resumed on a

surface which has hardened, it shall be roughened, swept clean, thoroughly wetted and covered

with a 13 mm. Thick layer of mortar composed of cement and sand in the same ratio as in the

concrete mix itself. This 13 mm. Layer of mortar shall be freshly mixed and placed immediately

before placing of new concrete. Where concrete has not fully hardened, all laitance shall be

removed by scrubbing the wet surface with wire or bristle brushes, care being taken to avoid

dislodgement of any particles of coarse aggregate. The surface shall then be thoroughly wetted

all free water removed and then coated with neat cement grout. The first layer of concrete to be

placed on his surface shall not exceed 150 mm. In thickness and shall be well rammed against

old work, particular attention being given to corners and close spots.

8.4 All concrete shall be compacted to produce a dense homogeneous mass with the assistance

of vibrators, unless otherwise permitted by the Engineer-in-charge for exceptional cases, such as

concreting under water, where vibrators cannot be used. Sufficient vibrators in serviceable

condition shall be kept at site so that spare equipment is always available in the event of

Concrete shall be judged to be compacted when the mortar fills the spaces between the coarse

aggregate and begins to cream up to form an even surface. Compaction shall be completed before

the initial setting starts i.e. Within 30 minutes of addition of water to dry mixture. During

compaction, it shall be observed that needle vibrators are not applied on reinforcement which is

likely to destroy the bond between concrete and reinforcement.

Immediately after compaction, concrete shall be protected from weather, including rain, running

water, shocks, vibration, traffic, rapid temperature changes, frost and drying out process. It shall

be covered with wet sacking, hassain or other similar absorbant material approved soon after the

initial set and shall be kept continuously wet for a period of not less than 14 days from the date

of placement. Masonry work over foundation concrete may be started after 48 hours of its laying

but curing of concrete shall be continued for a minimum period of 14 days.

10.0 Sampling and Testing of concrete:

10.1 Samples from fresh concrete shall be taken as per I. S. 1199-1959 and cubes shall be

made, cured and tested at 7 days or 28 days as per requirements in accordance with I. S. 516-

1959. A random sampling procedure shall be adopted to ensure that each concrete batch shall

have a reasonable chance of being tested i.e. The sampling should be spread over the entire period

of concreting and cover all mixing units. The minimum frequency of sampling of concrete of

each grade shall be in accordance with following :

Quantity of No. Of samples Quantity of No. Of samples

concrete in the concrete in the

51 cmt and above + one additional for each additional 50 cmt. Or part thereof.

NOTE : At least one sample shall be taken from each shift. Ten test specimens shall be made

from each sample, five for testing at 7 days and the remaining five at 28 days. The samples of

concrete shall be taken on each day of the concreting as per above frequency. The number of

specimens may be suitably increased as deemed necessary by the Engineer-in-charge when

procedure of tests given above revels a poor quality of concrete and in other special cases.

10.2 The average strength of the group of cubes case for each day shall not be less than the

specified cube strength of 250 kg/Cm2 at 28 days. 20% of the cubes cast for each day may have

value less than the specified strength provided the lowest value is not less than 85% of the

specified strength. If the concrete made in accordance with the proportions given for a particular

grade, does not yield the specified strength, such concrete shall be classified as belonging to the

appropriate lower grade. Concrete made in accordance with the proportions given for a particular

grade shall not however, be placed in a higher grade on the ground that the test strength are

higher than the minimum specified.

11.0 Stripping :

11.1 The Engineer-in-charge shall be informed in advanced by the contractor of his intention to

strike the form work. While fixing the time for removal of form work due consideration shall be

given to local conditions, character of the structure the weather and other condition that influence

the setting of concrete and of the materials used in the mix in normal circumstances (generally

where temperatures are above 20ºc) and where ordinary concrete is used forms may be struck

after expiry of periods specified in item No. 9.1 (A) for respective item of form work.

c. All formwork shall be removed without causing any shock or vibration as would damage

the concrete. Before the soffits and struts are removed the concrete surface shall be exposed

where necessary in order to ascertain that the concrete has sufficiently hardened. Centering shall

be gradually and uniformly lowered in such manner as to permit the concrete to take stresses due

to its own weight uniformly and gradually. Where internal metal ties are permitted they or their

removable parts shall be extracted without causing any damage to the concrete and remaining

holes filled with mortar. No permanently embedded metal part shall have less than 25 mm. Cover

to the finished concrete surface. Where it is intended to re-use the formwork, it shall be cleaned

and made good to the satisfaction of the Engineer-in-charge. After removable of form work and

shuttering the Executive Engineer shall inspect the work and satisfy by random checks that

concrete produced is of good quality.

d. Immediately after the removal of forms all exposed bolts etc., passing through the cement

concrete member and use for shuttering or any other purpose shall be cut inside the cement

concrete members to a depth of at least 25 mm. Below the surface of the concrete and the

resulting holes be filled by cement mortar. All fine caused by form joints, all cavities produced

by the removal of forms ties and all other holes and depressions honeycomb spots broken edges

or corners and other defects shall be thoroughly cleaned, saturated with water and carefully

pointed and rendered true with mortar of cement and fine aggregate mixed in the proportion used

in the grade of concrete that is being finished and of as dry consistency as is possible to use.

Considerable pressure shall be applied in filling and pointing to ensure through filling in all

voids. Surfaces which are pointed shall be kept moist for a period of 24 hours.

If rock pockets honeycombs in the opinion of the Engineer-in-charge are of such an extent or

character as to affect the strength of the structure materially or to endanger the life of the steel

reinforcement he may declare the concrete defective and require the removal and replacement of

the portions of the structure affected.

12.0 Mode of measurement and payment:

12.1 The consolidated cubical contents of concrete work as specified in item shall be measured

the concrete laid in excess of section shown on drawings or as directed shall not be measured.

No deduction shall be made for

(a) Ends of dis-similar materials such as joints, beams, posts, girders, rafters, purling trusses,

corbels and steps etc Up to 500 Sq Cm In section.

(b) Opening up to 0.1 Sq. M.

12.2 The rate includes cost of all materials, labor, tools and plant required for mixing,

placing in position, vibrating and compacting, finishing as directed curing and all other

incidental expenses for producing concrete of specified strength. Rate is inclusive form work.

12.3 The rate shall be for a unit of one cubic meter.

Item no.14 Providing TMT Bar FE 500D reinforcement for R.C.C. work including

bending, binding and placing in position complete upto floor two level (upto 10 ton)

1.0 Materials :

TMT Bars shall conform to M-19B.

TMT BARS shall confirm to I.S. 1786-1985 OF Fe-500 Grade or above form Approved quality.

Mild steel binding wires shall conform as below.The mild steel wire shall be of 1.63 mm. Or

1.22 mm. (16 or 18 gauge) diameter and shall conform to I. S. 280-1972.The use of black wire

will be permitted for binding reinforcement bars. It shall be free from rust, oil paint, grease, loose

mill scale or any other undesirable coating which may prevent adhesion of cement mortar.The

materials shall be procured & use from the recognized firms as mentioned in list attached with

2.0 Workmanship :

The work shall consist of furnishing and placing reinforcement to the shape and dimensions

shown as on the drawings or as directed.

2.1 Steel shall be clean and free from rust and loose mill scale at the time of fixing in position

and subsequent concreting.

2.2 Reinforcing steel shall conform accurately to the dimensions given in the bar bending

schedules shown on relevant drawings. Bars shall be bent cold to specified shape and dimensions

or as directed using a proper bar bender, operated by hand or power to attain proper radius of

bends. Bars shall not be bent or straightened in a manner that will injure the material. Bars bent

during transport or handling shall be straightened before being used on the work. They shall not

be heated to facilitate bending. Unless otherwise specified a ‘U’ type hook at the end of each bar

shall invariably be provided to main reinforcement. The radius of the bend shall not be less than

twice the diameter of the round bar and the length of straight part of the bar beyond the end of

the curve shall be at least four times the diameter of the round bar. In case of bars which are not

round and in case of deformed bars, the diameter shall be taken as the diameter of circle having

an equivalent effective area. The hooks shall be suitably encased to prevent any splitting of the

2.3 All the reinforcement bars shall be accurately placed in exact position shown on the drawings

and shall be securely held in position during placing of concrete by annealed binding wire not

less than 1 mm. In size and by using stay blocks or metal chair spacers, metal hangers, supporting

wires or other approved devices at sufficiently close intervals. Bars shall not be allowed to sag

between supports nor displaced during concreting or any other operations of the work. All

devices used for positioning shall be of non-corrodible material. Wooden and metal supports

shall no extend to the surface of concrete, except where shown on drawings. Placing bars on

layers of freshly laid concrete as the work progress for adjusting bar spacing shall not allowed.

Pieces of broken stone or brick and wooden blocks shall not be used. Layers of bars shall be

separated by spacebars, precast mortar blocks or other approved devices. Reinforcement after

being placed in position shall be maintained in a clean condition until completely embedded in

concrete. Special care shall be exercised to prevent any displacement of reinforcement in

concrete already placed. To prevent reinforcement from corrosion, concrete cover shall be

provided as indicated on drawings. All the bars producing from concrete and to which other bars

are to be spliced and which are likely to be exposed for a period exceeding 10 days shall be

protected by a thick coast of neat cement grout.

2.4 Bars crossing each other where required shall be secured by binding wires (annealed) of size

not less than 1 mm. In such manner that they do not slip over each other at the time of fixing and

2.5 As far as possible bars of full length shall be used. In case this is not possible, overlapping

of bars shall be done as directed. When practicable, overlapping bars shall not touch each other

but be kept apart by 25 mm. Or 1.25 times the maximum size of the coarse aggregate whichever

is greater by concrete between them. Where not feasible overlapping bars shall be bound with

annealed wires not less than 1 mm. Thick twisted tight. The overlaps shall be staggered for

different bears and located at points along the span where neither movement is maximum.

2.6 Whenever indicated on the drawings or desired by the Engineer-in-charge bars shall be

joined by couplings which shall have a cross section sufficient to transpit the full stresses of bars.

The ends of the bars that are joined by coupling shall be upset for sufficient length so that the

effective cross section at the base of threads is not less than normal cross-section of the bar.

Threads shall be standard threads. Steel for coupling shall conform to I. S.

When permitted or specified on the drawings joints of reinforcement bars shall be butt-welded

so as to transmit their full stresses. Welded joints shall preferably be located at points when steel

will not be subject to more than 75 per cent of the maximum permissible stresses and welds so

staggered that at any one section not more than 20 percent of the rods are welded. Only electric

arc welding using a process which excludes air from the molten metal and conforms to any or

all other special provisions for the work shall be accepted. Suitable means shall be provided for

holding bars securely in position during welding. It shall be ensured that no voids are left in

welding and when welding is done in two or three stages previous surface shall be cleaned

properly. Ends of the bars shall be cleaned of all loose scale, rust, grease, paint and other foreign

matter before welding. Only competent welders shall be employed on the work. The M. S.

Electrodes used for welding shall conform to I. S. 814. Welded pieces of reinforcement shall be

tested. Specimen shall be taken from the actual site and their number and frequency of test shall

be as directed.

3.0 Mode of measurement and payment:

3.1 Reinforcement shall be measured in length wise in RMT including overlaps, separately for

different diameters as actually used in the work. Where welding or coupling is resorted to in

place of lap joints such joints shall be measured for payment as equivalent length of overlap as

per design requirement. From the length so measured the weight if reinforcement shall be

calculated in kg . Wastage and annealed steel wire for binding shall not be measured and the cost

of these items shall be deemed to be included in the rate for reinforcement.

3.2 The rate for reinforcement includes cost of steel, binding wires its cutting, bending, placing,

binding and fixing in position as shown on the drawings and as directed. It shall also include all

devices for keeping reinforcement in approved position cost of joining as per approved method

and all wastage and spacer bars.

3.3 The rate shall be for a unit of One Kg.

Item no.15 Providing formwork of ordinary timber planking so as to give a rough finish

including centering shuttering strutting and propping etc. Height of propping and

centering below supporting floor to ceiling not exceeding 4 M. and removal of the same for

in situ reinforced concrete and plain concrete work in. (A) Foundations Footings Bases of

Columns etc. and Mass concrete. (upto 10 ton)

1.0 Materials :

1.1 The shuttering to be provided shall be of ordinary timber planks and shall conform to M-

1.2 The dimensions of scantlings and battens shall conform to the design. The strength of the

wood shall not be less than that assumed in the design.

2.0 Workmanship : 2.1 The form work shall conform to the shape lines and dimensions as

shown on the plans and be so constructed as to remain sufficiently rigid during the placing and

compacting of the concrete. Adequate arrangements shall be made by the contractor to safe-

guard against any settlement of the form work during the course of concreting and after

concreting. The form work of shuttering, centering, scaffolding bracing etc. Shall be as per

2.2 Cleaning & Treatment of forms : 2.2.1 All rubbish, particularly chippings shaving and

saw dust shall be removed from the interior of the form before the concrete is placed and the

form work in contact with concrete shall be cleaned and thoroughly wetted or treated. The surface

shall be then coated with soap solution applied before concreting is done. Soap solution for the

purpose shall be prepared by dissolving yellow soap in water to get consistency of paint.

Alternatively a coat of raw linseed oil or form oil of approved manufacture may be applied in

case steel shuttering us used. Soap solution or raw linseed oil shall be applied after thoroughly

cleaning the surface. Care shall be taken that the coating does not get on construction joints

surface and reinforcement bars.

2.3 Stripping time :

2.3.1 In normal circumstance and where ordinary cement is used forms may be struck after

expiry of following periods :

(a) Sites of walls columns and vertical faces of beam 24 to 48 hours.

(b) Beam soffits. (Props left under) – 7 days.

(c) Removal of props slabs.

(i) Slabs spanning upto 4.5 m. – 7 days

(ii) Spanning over 4.5 mm. – 14 days.

(d) Removal of props to beams and Arches.

(i) Spanning upto 6 m. – 14 days.

(ii) (ii) Spanning over 6 m. – 21 days.

2.4 Procedure when removing the form work : 2.4.1 All form work shall be removed without

such shock or vibrations as would damage the reinforced concrete surface. Before the soffit

formwork and struts are removed the soffits and the concrete surface shall be exposed where

necessary in order to ascertain that the concrete has sufficiently hardened.

2.5 Centering : 2.5.1 The centering to be provided shall be got approved. It shall be

sufficiently strong to ensure absolute safely of the formwork and concrete work before during

and after pouring concrete. Watch should be kept to see that behavior of centering and formwork

is satisfactory during concreting. Erection should also be such that it would allow removal of

forms in proper sequence without damaging either the concrete or the forms to be removed.

2.5.2 The props of centering shall be provided on firm foundation or base of sufficient strength

to carry the loads without any settlement.

2.5.3 The centering and formwork shall be inspected and approved by the Engineer-in-charge

before concreting. But this will not relive the contractor of his responsibility for strength,

adequacy and safety of form work and centering. If there is a failure of formwork or centering,

contractor shall be responsible for the damages to the work, injury to life and damage to property.

2.6 Scaffolding :

2.6.1 All scaffolding, hoisting arrangements and ladders etc. Required for the facilitating of

concreting shall be provided and removed on completion work by contractor at his own expense.

The scaffolding, hoisting arrangements and ladders etc. Shall be strong enough to withstand all

live, dead and impact loads expected to act and shall be subject to the approval of the Engineer-

in-charge. However, contractor shall be solely responsible for the safety of the scaffolding,

hoisting arrangement, ladders, work and workman etc.

2.6.2 The scaffolding, hoisting arrangement and ladders shall allow easy approach to the work

spot and afford easy inspection.

2.6.3 The rate is applicable to all conditions of working and height upto 4 mts. The rate shall

include the cost of materials and labor for various operations involved such as :

(a) Splayed edges, notching, allowance for overlaps and passing at angles, battens centering,

shuttering, strutting, propping Bolting, nailing, wedging, easing, striking and removal.

(b) Filleting to form stop chamfered edges or played external angles not exceeding 20 mm. Width

to beams, columns and the Like.

(c) Temporary openings in the forms for pouring concrete, if required, removing rubbish etc.

(d) Dressing with oil to prevent adhesion of concrete with shuttering and

(e) Raking or circular cutting.

2.7.1 Before re-use all forms shall be inspected by Engineer-in-charge and their suitability

ascertained. The forms shall be scarred, cleaned and joints gone over, repaired where required.

Inside surface shall be retreated to prevent adhesion of concrete.

3.0 Mode of measurements & payment :

3.1 Form work shall be measured as the area in square meters of shuttering in contract with

concrete except in the case of inclined member and portion of curved pro-file and upper side in

which case only area of underside shall be measured for payment.

3.4 Form work to secondary beams shall be measured up to the sides of main beams but no

deduction shall be made from the form work of the main beam at the inter section point. No

deduction shall be made from the form work of a column at inter section of beams.

3.5 The rate is for the completed item.

3.6 The rate shall be for a unit of one Sq. Meter.

Item no.16 Providing formwork of ordinary timber planking so as to give a rough finish

including centering shuttering strutting and propping etc. Height of propping and

centering below supporting floor to ceiling not exceeding 4 M. and removal of the same for

in situ reinforced concrete and plain concrete work in. (C) Vertical surface such as walls

(any thickness) partitions and the like including attached buttresses & string course & the

like. (upto 10 ton)

1.0 Materials :

1.3 The shuttering to be provided shall be of ordinary timber planks and shall conform to M-

1.4 The dimensions of scantlings and battens shall conform to the design. The strength of the

wood shall not be less than that assumed in the design.

2.0 Workmanship : 2.1 The form work shall conform to the shape lines and dimensions as

shown on the plans and be so constructed as to remain sufficiently rigid during the placing and

compacting of the concrete. Adequate arrangements shall be made by the contractor to safe-

guard against any settlement of the form work during the course of concreting and after

concreting. The form work of shuttering, centering, scaffolding bracing etc. Shall be as per

2.2 Cleaning & Treatment of forms : 2.2.1 All rubbish, particularly chippings shaving and

saw dust shall be removed from the interior of the form before the concrete is placed and the

form work in contact with concrete shall be cleaned and thoroughly wetted or treated. The surface

shall be then coated with soap solution applied before concreting is done. Soap solution for the

purpose shall be prepared by dissolving yellow soap in water to get consistency of paint.

Alternatively a coat of raw linseed oil or form oil of approved manufacture may be applied in

case steel shuttering us used. Soap solution or raw linseed oil shall be applied after thoroughly

cleaning the surface. Care shall be taken that the coating does not get on construction joints

surface and reinforcement bars.

2.3 Stripping time :

2.3.1 In normal circumstance and where ordinary cement is used forms may be struck after

expiry of following periods :

(e) Sites of walls columns and vertical faces of beam 24 to 48 hours.

(f) Beam soffits. (Props left under) – 7 days.

(g) Removal of props slabs.

(ii) Slabs spanning upto 4.5 m. – 7 days

(ii) Spanning over 4.5 mm. – 14 days.

(h) Removal of props to beams and Arches.

(iii) Spanning upto 6 m. – 14 days.

(iv) (ii) Spanning over 6 m. – 21 days.

2.4 Procedure when removing the form work : 2.4.1 All form work shall be removed without

such shock or vibrations as would damage the reinforced concrete surface. Before the soffit

formwork and struts are removed the soffits and the concrete surface shall be exposed where

necessary in order to ascertain that the concrete has sufficiently hardened.

2.5 Centering : 2.5.1 The centering to be provided shall be got approved. It shall be

sufficiently strong to ensure absolute safely of the formwork and concrete work before during

and after pouring concrete. Watch should be kept to see that behavior of centering and formwork

is satisfactory during concreting. Erection should also be such that it would allow removal of

forms in proper sequence without damaging either the concrete or the forms to be removed.

2.5.2 The props of centering shall be provided on firm foundation or base of sufficient strength

to carry the loads without any settlement.

2.5.3 The centering and formwork shall be inspected and approved by the Engineer-in-charge

before concreting. But this will not relive the contractor of his responsibility for strength,

adequacy and safety of form work and centering. If there is a failure of formwork or centering,

contractor shall be responsible for the damages to the work, injury to life and damage to property.

2.6 Scaffolding :

2.6.1 All scaffolding, hoisting arrangements and ladders etc. Required for the facilitating of

concreting shall be provided and removed on completion work by contractor at his own expense.

The scaffolding, hoisting arrangements and ladders etc. Shall be strong enough to withstand all

live, dead and impact loads expected to act and shall be subject to the approval of the Engineer-

in-charge. However, contractor shall be solely responsible for the safety of the scaffolding,

hoisting arrangement, ladders, work and workman etc.

2.6.4 The scaffolding, hoisting arrangement and ladders shall allow easy approach to the work

spot and afford easy inspection.

2.6.5 The rate is applicable to all conditions of working and height upto 4 mts. The rate shall

include the cost of materials and labor for various operations involved such as :

(a) Splayed edges, notching, allowance for overlaps and passing at angles, battens centering,

shuttering, strutting, propping Bolting, nailing, wedging, easing, striking and removal.

(b) Filleting to form stop chamfered edges or played external angles not exceeding 20 mm. Width

to beams, columns and the Like.

(c) Temporary openings in the forms for pouring concrete, if required, removing rubbish etc.

(d) Dressing with oil to prevent adhesion of concrete with shuttering and

(e) Raking or circular cutting.

2.7.1 Before re-use all forms shall be inspected by Engineer-in-charge and their suitability

ascertained. The forms shall be scarred, cleaned and joints gone over, repaired where required.

Inside surface shall be retreated to prevent adhesion of concrete.

3.0 Mode of measurements & payment :

3.1 Form work shall be measured as the area in square meters of shuttering in contract with

concrete except in the case of inclined member and portion of curved pro-file and upper side in

which case only area of underside shall be measured for payment.

3.4 Form work to secondary beams shall be measured up to the sides of main beams but no

deduction shall be made from the form work of the main beam at the inter section point. No

deduction shall be made from the form work of a column at inter section of beams.

3.5 The rate is for the completed item.

3.6 The rate shall be for a unit of one Sq. Meter.

Item no.17 Uncoursed rubble masonry with hard stone of approved quality in foundations

and plinth in cement mortar 1:5 (1cement : 5 coarse sand) including leveling up etc.

complete (upto 10 ton)

Rubble to be used in the stone masonary work shall confirm to I.S. 1597 (Part 1). Sample of the

stone to be used in work, be got approved from Executive Engineer-in-charge of work and further

qty. shall be collected as per approved sample. Stone shall be of uniform texture and colour,

hard, durable, tough and free from holes, decay, cracks and other defect. Only approved quality

suitable for work shall be collected on site.

Stone shall be laid on their natural bed i.e. with the strata perpendicular to the pressure.

Stone shall be laid on the broadest face. Larger stone shall be placed in lower courses for lateral

bond. Stone in any course shall overlay the stone in course below i.e. vertical joints as much as

possible and shall be solidly bedded in mortar. The chips of stones are wedged into the work,

wherever necessary to avoid thick bed or joints of mortar. Facing shall be of good selected stones.

To give sufficient transverse bond the prescribed numbers of headers extend from front

to back of thin work, and from outside wall to interior of thick wall. All joints shall be well

Comers and angle of wall shall be so constructed such as to unite work thoroughly. When

work is to be stopped or break, is unavoidable in work, it shall be in step joints. When laid stone

is to be removed for any reason, it shall not be slided but lifted and taken out.

Jambs of doors and window openings shall be formed with quoins of full height of the

course, in case of coursed masonary. The quoins shall be in breadth at least one and a half times

for depth of course and in length at least twice the depth. Wherever chisel dressing is required

and instructed, it shall have to be done to the width of frame of door, window or ventilators, to

have close fit between frame & masonary.

Work shall be properly cured and kept wet for minimum 20 days. All stones shall be

wetted sufficiently, before laying so as not to absorb water from masonary. In case due to

neglecting curing, mortar is found dry, white or powdery, the work shall be dismantled and

rebuilt at contractor’s cost.

Wherever necessary inserts of pipe, leaving holes, fixing inserts, providing and fixing

wooden plugs etc. shall be done without any extra cost. No extra payment shall be made for

building in any fixtures, holdfasts etc.

Contractor shall provide for chisel drafting corners and rounding interior corners of room

in rate quoted.

Mode of measurements & payment :

Payment shall be made for the cu. Meter of masonary work done on actual qty. of work done.

Volume of wall shall be reduced, if hollow, holes, recess, opening etc. are more than ½ sq. m.

without accounting flares.

Item no.18 Providing 20 mm thick cement plaster in single coat on rough (Similar) side of

single or half brick walls for interior plastring up to floor two level and finished even and

smooth in C.M (1:3) (1 cement : 3 sand) (Cement is to be brought by the contractor at his

1.0. Materials:

The cement mortar proportion 1:3 shall conform as below.

Proportion of Mix : Cement and sand shall be mixed to specified proportion, sand being measured

by measuring boxes. The proportion of cement will be by volume on the basis of 50 Kg./Bag of

cement being equal to 0.0342 Cu. M. The mortar may be hand mixed or machine mixed as

Preparation of Mortar: In hand mixed mortar cement and sand in the specified proportions shall

be thoroughly mixed dry on a clean impervious platform by turning over at least 3 times or more

till a homogenous mixture of uniform color is obtained. Mixing platform shall be so arranged that

no deleterious extraneous material shall get mixed with mortar or mortar shall flow out. While

mixing, the water shall be gradually added and thoroughly mixed to form a stiff plastic mass of

uniform color so that each particle of sand shall be completely covered with a film of wet cement.

The water cement ratio shall be adopted as directed.

The mortar so prepared shall be used within 30 minutes of adding water. Only such quantity of

mortar shall be prepared as can be used within 30 minutes.

2.0. Workmanship:

2.1. Scaffolding: Wooden ballies, bamboos, planks, treatles and other scaffolding shall be sound.

These shall be properly examined before erection and use. Stage scaffolding shall be provided for

ceiling plaster, which shall be independent of the walls.

2.2. Preparation of back-ground:

2.2.1. The surface shall be cleaned of all dust, loose mortar droppings, traces of algae, efflorescence

and other foreign matter by water or by brushing. Smooth surface shall be roughened by wire

brushing if it is not hard and by racking if it is hard. In case of concrete surface, if a chemical

retarder has been applied to the form work, the surface shall be roughened by wire brushing, all

the resulting dust and loose particles cleaned off, and care shall be taken that none of the retarders

is left on the surface. Trimming of projections on brick/concrete surface where necessary shall be

carried out to get an even surface.

2.2.2. Racking of joints in case of masonry where necessary shall be allowed to dry out for

sufficient period before carrying out the plaster work.

2.2.3. The work shall not be soaked but only damped evenly before applying the plaster. If the surface

becomes dry such area shall be moistened again.

2.2.4. For external plaster, the plastering operation shall be started from top floor and carried downwards.

For internal plaster, the plastering operations may be started whenever the building frame and cladding

work are ready and the temporary supporting ceiling resting on the wall of the floor have been removed.

Ceiling plaster shall be completed before starting plaster to walls.

2.3. Applications of plaster:

2.3.1. The plaster about 15 x 15 cms. Shall be first applied horizontally and vertically at not more than

meters intervals over the entire surface to serve as gauge. The surfaces of these gauges shall be truly in

plane of the finished plastered surface. The mortar shall then be applied in uniform surface slightly more

than the specified thickness, and then brought to a true surface by working a wooden straight edge reaching

across the gauges with small upward and sideways movement at a time. Finally, the surface shall be

finished off true with a trowel or wooden float according as a smooth or a sandy granular texture is required.

Excessive toweling or overworking the float shall be avoided. All corners, arrises, angles and junctions

are truly vertical or horizontal as the case may be and shall be carefully finished. Rounding or chamfering

corners, arises junctions etc. Shall be carried out with proper templates to the size required.

2.3.2. Cement mortar shall be used within half an hour after addition of water. Any mortar or plaster, which

is partially set, shall be rejected and removed forthwith from the size.

2.3.3. In suspending the work at the end of the day, the plaster shall be left out clean to the line both

horizontally and vertically. When recommending the plaster, the edges of the old work shall be scraped

clean and wetted with cement putty before plaster is applied to the adjacent areas to enable the two to

properly join together. Plastering work shall be closed at the end of the day on the body of the wall and

nearer than 15 cm. to any corners or arises. Horizontal joints in plaster work shall not also occur on parapet

tops and copings as these invariably load to leakage. No portion of the surface shall be left out initially to

be packed up later on.

2.3.4. Moistening shall commence as soon as plaster is hardened sufficiently. Soaking of walls shall be

avoided and only as much water as can be readily absorbed shall be used, excessive evaporation on the

sunny or windward side of building in hot air or dry weather shall be prevented by handing mattings or

gunny bags on the outside of the plaster and keeping them wet.

2.4 For finishing with a floating coat of net cement slurry:

2.4.1: This work is only of providing smooth cement finish with floating coat of neat cement slurry.

2.4.2 The coat of cement and fines and mortar of proportion 1:1 (1.5 mm. Thick about) shall be applied to

the plastered surface with a trowel to provide uniform texture while the base coast is still plastic.

2.4.3 In any continuous face of wall the finishing treatment should be carried out continuously and day to

day braked made to coincide with architectural breaks in order to avoid unsightly junctions.

3.0. Mode of measurements & payment:

3.1. The rate shall include the cost of all materials, labour and scaffolding etc. Involved in the operations

described under workmanship and floting coat.

3.2. All plastering shall be measured in square meters unless, otherwise specified, Length, breath or height

shall be measured correct to a centimeter.

3.3. Thickness of the plaster shall be exclusive of the thickness of the key i.e. Grooves or open joints in

brick work, stone work etc. Or space between laths. Thickness of plaster shall be average thickness with

minimum 20 mm. At any point on this surface.

3.4. This item includes plastering up to height 15 meters above ground level.

3.5. The measurement of wall plastering shall be taken between the walls or partition (dimensions before

plastering being taken) for length and from the top of floor or skirting to ceiling for height. Depth of cover

of cornices if any shall be deducted.

3.6. Soffits of stairs shall be measured as plastering on ceilings. Flowing soffits shall be measured

3.7. For jambs, soffits, sills etc. Each in area and for openings exceeding 0.5 sq. Mt. And not exceeding

3.00 sq. Mt. In each area deductions and additions shall be made in the following manner :

(a) No deductions shall be made for ends of joints, beams, posts etc. for openings not exceeding 0.5 sq.mt.

Each and no addition shall be made for reveals, jambs, soffits, sills etc. Of these opening for finish to plaster

around ends of joints, beams, posts etc.

(b) Deduction for openings exceeding 0.5 sq.mt. But not exceeding 3 sq.mt. Each shall be made as follows

and no addition shall be made for reveals, jambs, soffits, sills etc. Of these openings.

(i) When both faces of all wall are plastered with same plaster, deduction shall be made for one face only.

(ii) When two faces of wall are plastered with different types of plaster or if one faces is plastered and the

other pointed, deductions shall be made from the plaster or pointing on the side of frame for door, window

etc. On which width of reveals is less than that on the other side but no deductions shall be made on the

outer side. Where width of reveals on both faces of all are equal, deductions of 50% of area of opening on

each face shall be made from area of plaster and/or pointing as the case may be.

3.8. For openings having door frames equal to projecting beyond the thickness of wall, full deduction for

opening shall be made from each plastered face of the wall.

3.9. In case of openings of area above 3 sq.mt. Each, deduction shall be made for opening but jambs, soffits

and sills shall be measured.

3.10. The rate shall be for unit of one Sq. Metre

Item no.19 Providing and Laying weep hole in Wall using 4 Kg/Cm2 PVC/AC pipes of

110mm diameter including proper grade and joining etc. complete as directed by EIC.

1.1 It should be of Finolex/Supreme/Astral and of the following outside dia low density pipes complete

with special flange compression type fittings i.e. Y bend, Tee, Plug bend, wall clips etc. including

making good the wall ceiling and floor. For rainwater pipe from terrace to ground floor and weep holes

in compound wall as per site requirement.

1.2 P.V.C. rain water pipe shall be of approved make like FINOLEX brand other confirming to I.S.

specifications for the same. Pipe of 110mm dia, specified in the item shall be used. Approval of make of

pipe shall be obtained. In case, if necessary, manufacturers test certificate shall be submitted. Pipe shall

be handled carefully and cracked and damaged /cracked pipe shall not be used. 3 coats of paint is to be

carried out similar to surface paint,Pipes shall be fixed in plumb and with all necessary fittings of same

brand make like bend, tee, collar, shoe, cowl ventilator at top. Pipe shall be fixed with wall/concrete

surface with necessary wooden blocks, clamps of 18 gauge GI sheet, approved quality nails etc. Clamps

should be provided at interval 1.5 to 2 mtr.

1.3 When the pipe laid checked and okayed, the joints of pipe shall be filled with solution and joints

made watertight. Cowl ventilator shall be provided on top in case of drainage pipe. For rain water down

take pipe, concrete apron of 300x300x75 mm. below shoe shall be provided for protection of earth. So it

is not washed away due to rain water.

1.4 Curing of apron for period of 7days and pipeline shall be given 3 coats of colour wash.

2.0 Mode of measurements & payment:

The rate shall be for a unit of Rmt including bend ,tee, coupling & shoe.

Item no.20 Supplying and fixing reinforced concrete heavy duty non-pressure pipes with

collars for culverts carrying heavy traffic as per IS 458-1991 specifications including setting

the pipes in C.M. 1:2 watering and laying (to level or slopes) of class NP3 of following

internal daimeters. (v) 900mm dia. (upto 10 ton)

The work shall consist of furnishing and installing reinforced cement concrete pipe of the type

diameter and length required at the location shown on the drawings or as ordered by the Engineer-

Reinforced concrete pipe shall be NP-3 type conforming to the requirements of IS: 458 and shall

be of 900 mm internal dia. as specified in the item. Each consignment of cement concrete pipes shall

be inspected, if necessary and approved by the Engineer-in-charge, either at the place of

manufacture or at the site before their incorporation in the works.

NP3, NP2, NP1 pipes are used for R.C.C. Pipes, where testing of pipes will not be feasible. The

contractors will have to produce a certificate from the manufacturers on company's letter head the

given hereinafter form.

Production of such certificate will not however relieve the contractor from his responsibility of

supplying pipes of required standard and will have to bear the loss or damage caused to the work on

account of defects found subsequently during the execution. It will also be necessary to purchase

these pipes from manufacturer having standard equipments for carrying out various test as per IS:

458 at his factory.

FORM OF CERTIFICATE FOR NP3, NP2, NP1 PIPES

We _______________________________ manufacturer of R.C.C. pipes

produce R.C.C. pipes as per the requirement of IS: 458 and also carry out the required test at our

place. We have acquired equipments for carrying out test and are prepared to carryout test at our

We have experience of manufacturing of pipes of ____________________ years The' pipes

supplied by us to M/s. __________ ___ _______________________ satisfy

the requirement of IS:

Place :_________ Manufacturer's Sign. ____________

No pipe shall be placed in position until the foundations have been approved by the

Engineer-in-charge. Where two or more pipes are to be laid adjacent to each other, they shall be

separated by a distance equal to at least half the diameter of the pipe subject to minimum of

mm. The laying of pipes on the prepared foundation shall start from the outlet and proceed towards

the inlet and be completed to the specified lines and grades. The pipes shall be fitted and matched

so that when laid in works they form a culvert with a smooth uniform invert. Any pipe found

defective or damaged during laying shall be removed at there cost of Contractor.

The pipes shall be jointed either by collar joint or by flush joint. In the former case,

the collars shall be of R.C.C., 150 to 200 mm wide and having the same strength as the pipes to be

jointed. Caulking space shall be between 13 and 20 mm according to the diameter of the pipes.

Caulking material shall be slightly wet mix of cement and sand in the ratio of 1:2 rammed with

Caulking irons. Before caulking the collar shall be so placed that its centre coincides with that of

pipe and an even annular space is left between the collar and the pipes. Flush joint may be shaped

to form a self centering joint with a joining space 13 cm wide. The joining space shall be filled with

cement mortar. 1 cement to 2 sand, mixed sufficiently dry to remain in position when forced with a

trowel or rammer. Care shall be taken to fill all voids and excess mortar shall be removed. All joints

shall be made with care so that their interior surface is smooth and consistent with the interior surface

of the pipes. After finishing, the joint shall be kept covered and damp for at least four days.

R.C.C. pipe shall be measured along their centre between their inlet and outlet ends

in linear meters.

The rate for the pipes shall include the cost of pipe including loading, unloading,

handling storing laying in position and joining complete.

Measurement for Payment: It shall be measured in terms of running meter.

Item no.21 Supplying and fixing reinforced concrete heavy duty non-pressure pipes with

collars for culverts carrying heavy traffic as per IS 458-1991 specifications including setting

the pipes in C.M. 1:2 watering and laying (to level or slopes) of class NP3 of following

internal daimeters.(ii) 450mm dia. (upto 10 ton)

The relevant specification of item No. 20 shall be followed except that Reinforced concrete pipe

shall be NP-3 type conforming to the requirements of IS: 458 and shall be of 450 mm internal

dia. as specified in the item. Each consignment of cement concrete pipes shall be inspected, if

necessary and approved by the Engineer-in-charge, either at the place of manufacture or at the

site before their incorporation in the works.

Measurement for Payment: It shall be measured in terms of running meter.

Item no.22 Providing and laying 230 mm thickness in two layers of 115 mm thick each

WBM BTMC metal with 63mm and down grad aggregate including breaking of boulders

to required size, filling the interstices with selected small size of quarry spalls/stone

chipps/quarry dust etc. as per site requirement with watering and compacting With power

roller exceeding 8 tonne and not exceeding 12 tonne in line and level with proper camber

etc. as directed by EIC.

The relevant specification shall be followed as per specification given in the item and as per

instruction of EIC

Mode of measurements & payment:

1. The rate includes the cost of all labour and materials, fitting involved in the operations

described under item.

2. The rate shall be for unit of one CMT

Item no.23 Preparing surface by Brushing with wire brushes for removing caked mud etc.

sweeping with brooms and finally fanning the cleaned surface with gunney bags to remove

all loose dirt etc. (i) Water bound macadam surface (New)

The work is to be carried out as per item description and as directed by EIC.

Measurement for Payment: It shall be measured in terms of surface area of prepared surface

in square meter.

Item no.24 Preparing surface by Brushing with wire brushes for removing caked mud etc.

sweeping with brooms and finally fanning the cleaned surface with gunney bags to remove

all loose dirt etc. (ii) Black top surface.

The work is to be carried out as per item description and as directed by EIC.

Measurement for Payment: It shall be measured in terms of surface area of prepared surface

in square meter.

Item no.25 Providing and laying bituminous grout 75mm thick compacted in single layer

with tack coat of asphalt 60/70 at the rate of 2.5 Kg./10 Sq. m. and using B.T. chips of

required gradation and asphalt 60/70 grade for mixing @ 1.99% by weight of total mix

including heating the aggregate and asphalt by drum mix plant and spreading the same by

paver finisher in line and level with proper camber and consolidation with vibratory roller

including providing all materials equipment, tools and plants, oil, kerosene, firewood,

labour charges etc.

The work shall consist of construction, in a double course (two layers of 37.50 mm) of

compacted crushed aggregates premixed with a bituminous binder, to serve as base/binder

course, laid immediately after mixing, on a base prepared previously in accordance with the

requirement of these Specifications and in conformity with the lines, grades and cross-sections

shown on the drawing or as directed by the Engineer.

Bituminous grout shall be laid compacted in two layers of 37.50 mm. Before laying of each layer

of 37.50 mm Bituminous grout, one layer of tack coat of asphalt 60/70 at the rate of 2.5 Kg./10

Sq. m. shall be applied for two layers.

The bitumen shall be paving bitumen of suitable viscosity grade 60/70 as per IS:73. The actual

grade of bitumen to be used shall be decided by the Engineer appropriate to the region, traffic,

rainfall and other environmental conditions. Guidelines on selection of the grade of bitumen are

given in Appendix-4.

Viscosity Grade (VG) Bitumen Specification as per IS 73 :

Characteristics VG - 10 VG-20 VG-30 VG-40

Absolute Viscosity 60C, poises, min 800 1600 2400

Kinematic Viscosity 135C CSI, min 250 300 350

Flash point, C, min 220 220 220

Solubility in trichloroethylene, % min 99.0 99.0 99.0

Penetration at 25C 80-100 60-80 50-70 40-60

Softening point, C min 40 45 47

Test on residue from thin film oven test / RTFOT :

(A) Viscosity ration at 60C, max 4.0 4.0 4.0

(B) Ductility at 25C, cm, min after thin film over 75 50 40

The aggregates shall consist of crushed stone, crushed gravel/shingle or other stones. They shall

be clean, strong, durable, of fairly cubical shape and free from disintegrated pieces, organic or

other deleterious matter and adherent coating. The aggregates shall preferably be hydrophobic

and of low porosity. If hydrophilic aggregates are to be used, the bitumen shall preferably be

treated with anti-stripping agents of approved quality in suitable dose as per Appendix-5. The

aggregates shall satisfy the physical requirements set forth in Table 500-3.

TABLE 500-3. PHYSICAL REQUIREMENTS OF AGGREGATES FOR

BITUMINOUS GROUT

S. No. Test Test Method Requirement

1 Los Angeles Abrasion Value IS:2386 (Part - 4) 40 percent Maximum

2 Aggregate Impact Value* -do- 30 percent Maximum

3 Flakiness and Elongation IS: 2386 (Part - 1) 30 percent Maximum

Indices (Total)**

4 Coating and Stripping of AASHTO T 182 Minimum retained

Bitumen Aggregate Mixtures coating 95 per cent

(i) Loss with Sodium IS: 2386 (Part – 5) 12 percent Maximum

Sulphate 5 cycles

(ii) Loss with Magnesium 18 per cent Maximum

6 Water absorption IS: 2386(Part - 3) 2 per cent Maximum

* Aggregates may satisfy requirements for either of the two tests.

** To determine this combined proportion, the flaky stone from representative sample

should first be separated out. Flakiness index is weight of flaky stone metal divided by weight

of stone sample. Only the elongated particle be separated out from the remaining (non flaky)

stone metal. Elongation index is weight of elongated particles divided by total non flaky particles.

The value of flakiness index and elongation index so found are added up.

Proportioning of materials:

The bitumen content for premixing shall be 1.99 % (percent) by weight of the total mix except

when otherwise directed by the Engineer.

The maximum compacted thickness of a layer shall be 75mm.

The quantities of aggregates to be used shall be sufficient to yield the specified thickness after

AGGREGATE GRADING FOR BITUMINOUS GROUT

IS Sieve Percent by weight passing the sieve

Variation in proportioning of materials : The Contractor shall have the responsibility for

ensuring proper proportioning of materials and producing a uniform mix. A variation in binder

content +0.3 per cent by weight of total mix shall however be permissible for individual

specimens taken for quality control tests vide Section

Construction Operations:

Weather and seasonal limitations : The work of laying shall not be taken up during rainy or

foggy weather or when the base course is damp or wet, or during dust storm or when atmospheric

temperature in shade is 10 degree C or less.

Preparation of base : This work shall consist of preparing an existing granular or black topped

surface bituminous course. The work shall be performed on such widths and lengths as shown in

application drawing or as directed by the Engineer. The existing surface shall be firm and clean

and treated with prime or tack coat as shown on the drawings as otherwise stated in the contract.

For scarifying and re-laying the granular surface: The materials used shall be coarse

aggregates salvaged from scarification of the existing granular base course supplemented by

fresh coarse aggregates and screenings so that aggregates and screening thus supplemented

correspond to Clause 404. Water Bound Macadam or Clause 406. Wet Mix Macadam, as the

For patching pot holes and sealing cracks : Where the existing surface to be overlaid is

bituminous, any existing potholes and cracks shall be repaired and sealed in accordance with

Clauses 3004.2 and 3004.3 or as directed by the Engineer.

For Profile Corrective Course : A profile corrective course for correcting the existing

pavement profile shall be laid to varying thickness as shown on the Drawings, or as indicated in

the Contract Documents. The profile corrective course shall be laid to tolerances and densities

as specified for wearing course if a single layer, or base course, if it is to be covered with a

wearing course layer.

Profile corrective course and its application: The type of material for use as a profile corrective

course shall be as shown on the drawing. If it is to be laid as part of the overlay/strengthening

course, the profile corrective course material shall be of the same specification as that of the

overlay/strengthening course. However, if provided as a separate layer, it may be of the same

specification as the layer over which it is to be laid or intermediate between underlying layers,

as shown on the Drawing.

Surface Levels:

The levels of the sub grade and different pavement courses as constructed shall not vary from

those calculated with reference to the longitudinal and cross-profile of the road shown on the

drawings or as directed by the engineer beyond the tolerances mentioned in Table 900-1.

Bituminous material shall not be applied to a wet surface or during a dust storm or when the

weather is foggy, rainy or windy or when the temperature in the shade is less than 10DC. Where

the tack coat consists of emulsion the surface shall be slightly damp, but not wet. Where the tack

coat is of cut back bitumen the surface shall be dry.

Construction Equipment:

The tack coat distributor shall be self propelled or towed bitumen pressure sprayer, quipped for

spraying the material uniformly at a specified rate. Hand spraying of small areas inaccessible to

the distributor or in narrow strips shall be sprayed with a pressure and sprayer or as directed by

the Engineer 503.4.2 of MORTH specification.

Preparation of base : The surface on which the tack coat is to be applied shall be clean and free

from dust, dirt and any extraneous material, and be otherwise prepared in accordance with the

requirements of Clauses 501.8 and 902 as appropriate. Immediately before the application of the

tack coat, the surface shall be swept clean with a mechanical broom, and high pressure air jet, or

by other means as directed by the Engineer.

Application of tack coat:

The application of tack coat before laying of both layers of 37.50 mm and shall be at the rate

specified in the Contract, and shall be applied uniformly. If rate of application of Tack Coat is

not specified in the contract then it shall be at the rate specified in TABLE 500-2 of MORTH

specification. The normal range of spraying.

TABLE 500-2 RATE OF APPLICATION OF TACK COAT:

The emulsion asphalt at the rate of 2.5 kg per 10 sq.m. shall be used for tack coat temperature

for a bituminous emulsion shall be 20°C to 70°C and for a cut back 50°C to 80°C if RC-70/MC-

70 IS used. Where geosynthetic IS proposed for use, the provisions of Clauses 703.3.2, and

703.4.4 of MORTH specification shall apply. The method of application of the tack coat will

depend on the type of equipment to be used, size of nozzles, pressure at the spray ban and speed

of forward movement. The Contractor shall demonstrate at a spraying trial, that the equipment

and method to be used is capable of producing a uniform spray, within the tolerances specified.

Where the material to receive an overlay is a freshly laid bituminous layer, that has not been

subjected to traffic, or contaminated by dust, a tack coat is not mandatory where the overlay is

completed within two days.

Curing of tack coat: The tack coat shall be left to cure until all the volatiles have evaporated

before any subsequent construction is started. No pant or vehicles shall be allowed on the tack

coat other than those essential for the construction.

Quality Control of Work :

TOLERANCES IN SURFACE LEVELS

1. Sub grade + 20mm

2. Sub-base 4 - 10 mm

(a) Flexible pavement - 20mm

(b) Concrete pavement + 6mm

[Dry clean concrete or Rolled concrete] - 10mm

3. Base - course for flexible pavement + 6mm

(a) Bituminous course - 6mm

(b) Other than bituminous + 10mm

(i) Machine laid - 10mm

(ii) Manually laid + 15mm

4. Wearing course for flexible pavement

(a) Machine laid + 6mm

(b) Manually laid + 10mm

5. Cement concrete pavement + 5mm

This work shall consist of the application of a single coat (before laying of each layer of

mm) of high viscosity liquid bituminous material to an existing bituminous road surface

preparatory to the superimposition of a bituminous mix, when specified in the Contract or

instructed by the Engineer.

The binder used for tack coat shall be bitumen emulsion complying with IS:8887 (rapid setting)

of a type and grade as specified in the Section 500 of MORTH specification Contract or as

directed by the Engineer. The use of cut back bitumen as per IS:217 shall be restricted only for

sites at sub-zero temperatures or for emergency applications as directed by the Engineer.

Weather and Seasonal Limitations:

For control of the quality of materials supplied and the works carried out for relevant provisions

of Section 900 shall apply.

Specification: The rate shall cover the provision of tack coat at 0.25 kg per square meter with

provision that the variation in actual quantity of bitumen used will be assessed and the payment

adjusted accordingly.

Preparation and transport of mix:

Bituminous grout mix shall be prepared in a drum mix plant of adequate capacity and capable of

yielding a mix of proper and uniform quality with thoroughly coated aggregates.

The plant shall be drum mix type. The plant shall have coordinated set of essential units capable

of producing uniform mix within the job mix formula such as laid down in Appendix 'A'.

(a) In case of drum mix plant, the cold feed system shall have variable speed conveyors/ or other

suitable devices for regulating the accurate proportion of aggregate in to an even flood flow

automatically from a control operation/Control Cabin.

(b) Bitumen Control Unit: Capable of measuring/metering and spraying required quantity of

bitumen at specified temperature with automatic synchronization of bitumen and aggregate feed.

(c) Filler System : A fines feeder system suitable to receive bagged or bulk supply of filler

materials and its incorporation to the mix in the correct quantity shall be necessary audiliary.

(d) Dust Control : A suitable built in Dust Control Equipment for the dryer to contain the exhaust

of fine dust in the atmosphere for environmental control wherever so specified by the Engineer.

(e) Suitable auxiliary Bitumen Boiler of Adequate capacity with self heating arrangement and

temperature control device. The boiler should be fitted with temperature indicating instruments.

The temperature of binder at the time of mixing shall be in range of 150 Degree C to 163 degree

and that of the aggregate in the range of 155 degree C - 163 degree C provided that the difference

in temperature between the binder and aggregate at no time exceeds 14 Degree C.

Mixing shall be thorough to ensure that a homogeneous mixture is obtained in which all particles

of the aggregates are coated uniformly and the discharge temperature of mix shall be between

130 Degree C to 160 degree C.

The mixture shall be transported from the mixing place to the point of use in suitable tipper

vehicles. The vehicles employed for transport shall be clean and be covered in transit if so

directed by the Engineer. Any tipper causing excessive segregation of materials by its spring

suspension or other contributing factors or that which shows undue delay shall be removed from

the work unit such conditions are corrected.

Spreading: The mix transferred from the tipper at site to the paver shall be spread immediately

by means of self-propelled mechanical paver with suitable screeds capable of spreading, tamping

and finishing the mix true to the specified lines, grades and cross sections. The paver finisher

shall have the following essential features:

(a) Loading hoppers and suitable distributing mechanism.

(b) All drives having hydrostatic drive/control.

(c) The machine shall have a hydraulically extendable screed the appropriate width

(d) The screed shall have tamping and vibrating arrangement for initial compaction to the

layer as it is spread without rutting of otherwise marring the surface. It shall have adjustable

amplitude and variable frequency.

(e) The paver shall be equipment with necessary control mechanism so as to ensure that the

finished surface is free from surface blemishes.

(f) The paver shall be fitted with an electronic sensing device for automatic leveling and

profile control within the specified tolerances.

(g) The screed shall have the internal heating arrangement.

(h) The paver shall be capable of laying either 2.5 to 4.0 m width or 4.0 to 7.0 m width as

stipulated in the Contract.

(i) The paver shall be so designed as to eliminate skidding/slippage of the tyres during

However, in restricted locations and in narrow widths where the available plant cannot be

operated in the opinion of the Engineer, he may permit manual laying of the mix.

The temperature of the mix at the time of laying shall be in the range of 120°C to 160°C. In

multi-layer construction, the longitudinal joint in one layer shall offset that in the layer below by

about 150 mm. However, the joint in the top-most layer shall be at the lane line of the pavement.

Longitudinal joints and edges shall be constructed true to the delineating line parallel to the centre

line of the road. All joints shall be cut vertical to the full thickness of the previously laid mix and

the surface painted with hot bitumen before placing fresh material. Longitudinal and transverse

joints shall be offset by at least 250 mm from those in the lower courses and the joint on the top-

most layer shall not be allowed to fall within the wheel path. All transverse joints shall be cut

vertically to the full thickness of the previously laid mix with asphalt cutter/pavement breaker

and surface painted with hot bitumen before placing fresh material. Longitudinal joints shall be

preferably hot joints. Cold longitudinal joints shall be properly heated with joint heater to attain

a suitable temperature of about 80C before laying of adjacent material.

Compaction: After the spreading of mix, rolling shall be done by 80 to 100 kN vibratory roller.

Rolling shall start as soon as possible after the material has been spread deploying a set of rollers

as the rolling is to be completed in limited time frame. The roller shall move at a speed not more

than 5 km/h. Rolling shall be done with care to avoid unduly roughening of the pavement surface.

Rolling of the longitudinal joints shall be done immediately behind the paving operation. After

this, the rolling shall commence at the edges and progress towards the centre longitudinally

except that on super relevated and uni-directional cambered portions, it shall progress from the

lower to the upper edge parallel to the centre line of the pavement.

The initial or break-down rolling shall be done with 80-100 kN static weight smooth wheel roller

(3 wheels or tandem) as soon as it is possible to roll the mix without cracking the surface or

having the mix pick up on the roller wheels. The second or intermediate rolling shall follow the

break-down rolling with vibratory roller of 80 to 100 kN static weight or pneumatic tyred roller

of 150 to 250 kN weight, with minimum 7 wheels and minimum tyre pressure of 0.7 MPa as

closely as possible to the paver and be done while the paving mix is still at a temperature that

will result in maximum density. The final rolling shall be done while material is still workable

enough for removal of roller marks with 60 - 80 kN tandem roller. During the final rolling,

vibratory system shall be switched off. The joints and edges shall be rolled with a 80 to 100 kN

When the roller has passed over the whole area once, any high spots or depressions which

become apparent shall be corrected by removing or adding mix material. The rolling shall then

be continued till the entire surface has been rolled to 95 per cent of the average laboratory density

(obtained from Marshall specimens compacted as defined in Table 500-10), there is no crushing

of aggregates and all roller marks have been eliminated. Each pass of the roller shall uniformly

overlap not less than one-third of the track made in the preceding pass. The roller wheel shall be

kept damp if necessary to avoid bituminous material from sticking to the wheels and being picked

up. In no case shall fuel, lubricating oil shall be used for this purpose, nor excessive water poured

Rolling operations shall be completed in every respect before the temperature of the mix falls

Roller(s) shall not stand on newly laid material while there is a risk that surface will be deformed

thereby. The edges along and transverse of the bituminous grout laid and compacted earlier shall

be cut to their full depth so as to expose fresh surface which shall be painted with a thin surface

coat of approximate binder before the new mix is placed against it.

Surface Finish and Quality Control of Work :

The surface finish of construction shall conform to the requirements of Clause 902. Control on

the quality of materials and works shall be exercised by the Engineer in accordance with Section

The built-up spray grout shall be provided with next surfacing without any delay. If there is to

be any delay, the course shall be covered by a seal coat to the requirement of Clause 513 before

allowing any traffic over it. The seal coat in such cases shall be considered incidental to the work

and shall not be paid for separately.

Arrangement for Traffic:

During the period of construction, arrangement of traffic shall be done to Clause 112 of MORTH

Passage of Traffic along a part of the Existing Carriageway under Improvement:

For widening/strengthening existing carriageway where part width of the existing carriageway

is proposed to be used for passage of traffic, treated shoulders shall be provided on the side on

which work is not in progress. The treatment to the shoulder shall consist of providing at least

150 mm thick granular base course covered with bituminous surface dressing in a width of at

least 1.5 m and the surface shall be maintained throughout the period during which traffic uses

the same to the satisfaction of the Engineer. The continuous length in which such work shall be

carried out, would be limited normally to 500 m at a place. However, where work is allowed by

the Engineer in longer stretches passing places at least 20 m long with additional paved width of

2.5 m shall be provided at every 0.5 km interval.

In case of widening existing two-lane to four-lane the additional two lanes would be constructed

first and the traffic diverted to it and only thereafter the required treatment to the existing

carriageway would be carried out. However, in case where on the request of the Contractor work

on existing two lane carriageway is allowed by the Engineer with traffic using part of the existing

carriageway, stipulations as in para above shall apply.

After obtaining permission of the Engineer, the treated shoulder shall be dismantled the debris

disposed of and the area cleared as per the direction of the Engineer.

MEASUREMENTS FOR PAYMENT:

The payment shall be made on the tonnage basis of the weight of mix of aggregates and bitumen.

For this purpose, the contractor shall have to install a weight bridge of suitable capacity for the

purpose of weighment of dumpers at suitable place at his cost as directed. Weight of empty and

weight of loaded dumper will be recorded in bound and numbered register on plant site.

Department will be free to get some loaded dumpers test checked at other weight bridge. Weigh

Bridge will be periodically got calibrated and verified from weight and measure authorities.

For the purpose of application of tack coat, if the theoretical area as per sanctioned estimate for

basis of tonne differs with the actual area of work done in the field, the reduction in or addition

to payment shall have to be exceed respectively.

Weight of mix materials will be done in presence of responsible person, not less than the rank:

of supervisor of department and the measurement shall be recorded by the Deputy Engineer or

Junior Engineer or Executive Engineer. If so authorized, Record of each dumper will be

maintained separately in bound and numbered register, which will be maintained by the

departmental representative and signed by the contractor. Proper gate pass system shall be

established for the vehicles coming to the plant site and out going from the plant site. The location

of the kilometer, hectometer and meter in which individual dumper are unloaded shall be

recorded carefully.

The contract unit rate for the work shall be payment in full for carrying out the required

operations including full compensation for

(i) Making arrangements for traffic to Clause 112 of MORTH specification except or initial

treatment to verge, shoulders and construction of diversion.

(ii) Preparation of base except for laying of profile corrective course but including filling of

(iii) Providing all materials to be incorporated in the work including arrangement for stock yards,

all royalties, fees, rents where necessary and all leads and lift.

(iv) All labour, tools, equipment, plant including installation of drum mix plant, power supply

units and all machineries, incidental to complete the work to the specifications.

(v) Carrying out the work in part widths of the road where directed.

(vi) Carrying out all tests for control of quality.

The rate shall be for a unit of One Metric Tonne.

Item no.26 Providing and laying 50 mm.thick B.M. using B.T. aggregate at the rate of

0.66cmt.per M.T. asphalt for tack coat at 2.5 kg. / 10 sq.m. with mechanical sprayer and

bitumen grade 60/70 for mixing at 34.00kg./ M.T.i.e.3.4% of total mix including heating

the aggregate and asphalt by drum mix plant and spreading the same by paver finisher in

line and level with proper camber and consolidation with vibratory roller and power roller

including providing all materials equipment, tools and plants, oil, kerosene, firewood,

labour charges etc. complete using contractor’s own machineries drum mix plant and

paver finisher etc.

This work shall consist of bituminous construction in a single course having 50 mm thickness

course of compacted crushed aggregates premixed with a bituminous binder on a previously

prepared base to the requirements of these specification.

504.2 Materials:-

504.2.1 Bitumen:-

The bitumen shall be paving Emulsion RS-1 for tack coat at 2.5 Kg./10Sq.mt. with mechanical

sprayer and bitumen of penetration grade 60/70(VG-30) complying with Indian Standard

specification for “Paving Bitumen” IS:73.

504.2.2 Coarse aggregates:-

The coarse aggregates shall consist of crushed rock, crushed gravel or other hard material

retained on the 2.36 mm sieve. They shall be clean, hard, durable of cubical shape, free from

dust and soft or friable matter, organic or other deleterious matter. Where the contractor’s

selected source of aggregates have poor affinity for bitumen, as a condition for the approval of

that source, the bitumen shall be treated with approved anti-stripping agents as per the

manufacturer’s recommendations, without additional payment. Before approval of the source

the aggregate shall be tested for stripping.

The aggregates shall satisfy the physical requirements set forth in Table 500-3 as under.

Table 500.3 Physical, Requirements for Coarse aggregates

for bituminous Macadam

Property Test Specification

Cleanliness Grain Size analysis Max. 5% passing

0.075 mm sieve.

Particle shape Flakiness and Elongation Index Max. 30%

Strength Los Angeles Abrasion Value Max. 40%

Aggregate Impact Value Max. 30%

Durability Soundness

Sodium Sulphate Max. 12%

Magnesium Sulphate Max. 18%

Water Water Absorption Max. 2%

Stripping Coating and stripping of Bitumen Minimum retained

aggregate Mixtures. coating 95%

Water Sensitivity Retained Tensile Strength Minimum 80%

[1] IS: 2386 Part – 1 [2] IS : 2386 Part – 1 [the elongation test to be done only on non-flaky

aggregate in the sample] [3] IS : 2386 Part –

[7] The water sensitivity test is only to be carried out if the minimum retained coating in the

stripping test is less than 95 %

*** Aggregate may satisfy requirements of either of these two tests.

Where crushed gravel is proposed for use as aggregate not less than 90% by weight of

the crushed material retained of the 4.75 mm sieve shall have at least two fractured faces.

504.2.3 Fine aggregates:-

Fine aggregates shall consist of crushed or naturally occurring material or a combination

of the two passing 2.36 mm sieve and retained on 75 micron sieve. They shall be clean hard,

durable, dry and free from dust, and soft or friable matter, organic or other deleterious matter.

504.2.4 Aggregate grading and binder content:-

When tested in accordance with IS : 2386 Part-1 (wet sieving method) the combined

aggregate grading for the particular mixture shall fall within the limits type and quantity of

bitumen and appropriate thickness are also indicated for each mixture type.

504.2.5 Proportioning of material:-

The aggregates shall be proportioned and blended to produce a uniform mixture

complying with the requirements of Table 500-4. The binder content shall be within a

tolerance of + 0.3 % by weight of total mixture when individual specimens are taken for

quality control tests in accordance with the provisions of Section

Table 500.4 Composition of Bituminous Macadam

Mix designation Grading-2

Nominal aggregate size 19 mm

layer thickness 50 mm

IS : Sieve [MM] Cumulative % by weight of total aggregate passing.

Bitumen content % by

weight of total mixture

Bitumen Grade 60/70 (VG-30)

Note: - Appropriate bitumen contents for conditions in cooler areas of India may be upto 0.5%

higher subject to the approval of the Engineer.

504.3 Construction Operations:-

504.3.1 Weather and seasonal limitations:-

Laying shall be suspended while free standing water is present on the surface to be

covered or during rain, fog and dust storms. After rain the bituminous surface, prime or tack

coat, shall be blow off with a high pressure air jet to remove excess moisture or the surface

left to dry before laying shall start, laying of bituminous mixtures shall not be carried out when

the air temperature at the surface on which it is to be laid is below 100 C or when the wind

speed at any temperature exceeds 40 K.M./H at 2 Mt. height unless specifically approved by

504.3.2 Preparation of the base: -The base on which bituminous macadam is to be laid shall

be prepared shaped and compacted to the required profile in accordance with Clauses-501.8

and 902.3 as appropriate and a prime coat, shall be applied in accordance with Clause-502

where specified or as directed by the Engineer.

501.8 Preparation of Surface:-

504.8.1 Scope: - This work shall consist of preparing an existing granular or black topped

surface bituminous course. The work shall be performed on such widths and lengths as shown

on the drawings or as instructed by the Engineer. The existing surface shall be firm and clean

and treated with prime or tack coat as shown on the drawings as otherwise stated in the

504.3.3 Tack coat:-

A tack coat in accordance with Clause-503 shall be applied as required by the contract

documents or as directed by the Engineer.

503 Tack Coat:-

This work shall consist of the application of a single coat of low viscosity liquid bituminous

material to an existing bituminous road surface preparatory to the superimposition of a

bituminous mix, when specified in the Contract or instructed by the Engineer.

503.2. Materials

503.2.1. Binder: The binder used for tack coat shall be bitumen emulsion RS1 grade

complying with IS 8887. The use of cutback bitumen, as per IS 217 shall be restricted only

for sites at sub-zero for emergency applications as directed by the Engineer.

503.3. Weather and Seasonal Limitations

Bituminous material shall not be applied to a wet surface or during a dust storm or when the

weather is foggy, rainy or windy or when the temperature in the shade is less than 10°C.

Where the tack coat consists of emulsion, the surface shall be slightly damp, but not wet.

Where the tack coat is of cutback bitumen, the surface shall be dry.

503.4. Construction

503.4.1. Equipment: The tack coat distributor shall be a self-propelled or towed bitumen

pressure sprayer, equipped for spraying the material uniformly at a specified rate. Hand

spraying of small areas, inaccessible to the distributor, or in narrow strips, shall be sprayed

with a pressure hand sprayer, or as directed by the Engineer.

503.4.2. Preparation of base: The surface on which the tack coat is to be applied shall be

clean and free from dust, dirt, and any extraneous material, and be otherwise prepared in

accordance with the requirements of Clauses 501.8 and 902 as appropriate. Immediately

before the application of the tack coat, the surface shall be swept clean with a mechanical

broom, and high pressure air jet, or by other means as directed by the Engineer.

503.4.3. Application of tack coat: The application of tack coat shall be at the rate of

Kg/10 Sqmt. and shall be applied uniformly. The normal range of spraying temperature for a

bituminous emulsion shall be 20°C to 70°C and for a cutback, 50°C to 80°C if RC-70/MC-70

is used. Where a geosynthetic is proposed for use, the provisions of Clauses 703.3.2 and

703.4.4 shall apply. The method of application of the tack coat will depend on the type of

equipment to be used, size of nozzles, pressure at the spray bar, and speed of forward

movement. The Contractor shall demonstrate at a spraying trial, that the equipment and

method to be used is capable of producing a uniform spray, within the tolerances specified.

Where the material to receive an overlay is a freshly laid bituminous layer, that has not been

subjected to traffic, or contaminated by dust, a tack coat is not mandatory where the overlay

is completed within two days.

503.4.4. Curing of tack coat: The tack coat shall be left to cure until all the volatiles have

evaporated before any subsequent construction is started. No plant or vehicles shall be allowed

on the tack coat other than those essential for the construction.

504.3.4 Preparation and transportation of the mixture:-

501.3 Mixing:- Premixed bituminous materials, including bituminous macadam dense

bituminous macadam semi dense bituminous concrete and bituminous concrete and

bituminous concrete, shall be prepared in a hot mix plant of adequate capacity and bituminous

concrete, shall be prepared in a hot mix plant of adequate capacity and capable of yielding a

mix of proper and uniform quality with thoroughly coating aggregates. Appropriate mixing

temperatures can be found in 500.5 of these specifications, the difference in temperature

between the binder and aggregate should at no time exceed 140 C. In order to ensure uniform

quality of the mix and belief writing of aggregates, the hot mix plan shall be calibrated from

If a continuous mixing plant is to be used for mixing the bituminous bound macadam,

the Contractor Must demonstrate by laboratory analysis that the cold feed combined grading

is within the grading limits specified for the bituminous bound material. In the case of a

designed job mix, the bitumen and filter content shall be derived using this combined grading.

Further debits she available in the Manual for Construction and Supervision of bituminous

501.4 Transporting:-

Bituminous materials shall be transported in clean insulated vehicles, and unless other

wise agreed by the Engineer, shall be covered while in transit or awaiting tipping, Subject to

the approval of am Engineer, a thin coating of diesel or lubricating oil may be applied to the

interior of the vehicle to prevent sticking and to facilitate discharge of the material.

504.3.5 Spreading:-

Except in areas where a mechanical paver cannot access, bituminous materials shall be

spread, leveled and tamped by an approved self propelled paving machine. As soon as possible

after arrival at site, the materials shall be supplied continuously to the paver and laid without

The rate of delivery of material to the paver shall be regulated to enable the paver to

operate continuously. The travel rate of as paver, and its method of operations shall be

adjusted to ensure an even and uniform flow of bituminous material across the screed, free

from dragging, tearing and segregation of the material. In areas with restricted space where a

mechanical paver cannot be used, the material shall be spread, raked and leveled with suitable

by hand tools by experienced staff and compacted to the satisfactions of the Engineer.

The minimum thickness of material laid in each paver pass shall be in accordance with

the minimum values given in the relevant parts of these specifications. When laying binder

course or wearing course approaching an expansion joint of a structure, machine laying shall

stop 300 mm short of the joint. The remainder of the pavement upto the joint and the

corresponding area beyond it, shall be laid by hand, and the joint or joint cavity shall be kept

clear of surfacing material.

Bituminous material with temperature greater than 1450 C shall not be laid or deposited

on bridge desk water proofing systems, unless precautions against heat damage have been

approved by the Engineer.

Hand placing of pre mixed bituminous materials shall only be permitted in the following

[i] For laying regulating course of irregular shape and varying thickness.

[ii] In confined spaces where it is impracticable for a paver to operate.

[iii] For foot Ways.

[iv] At the approaches to expansion joints at bridge viaducts or other structures.

[v] For laying mastic asphalt in accordance with clause 515 as below.

[vi] For filling of path holes.

[vii] Where directed by the Engineer.

Manual spreading of pre mixed wearing course material or the addition of such material

by hand spreading to the paved area, for adjustment of level shall only be permitted in the

following circumstances.

[1] At the edge of the layers of material and at gullies and manholes.

[2] At the approaches to expansion joints at bridges, viaducts or other structures.

[3] As directed by the Engineer.

Table 500.5 Manufacturing and Rolling Temperatures.

Penetration Bitumen Aggregate Mixed Rolling Laving

Mixing Mixing Material [C] [C]

Maximum Maximum Maximum

Maximum Maximum Maximum

Maximum Maximum Maximum

504.3.6 Rolling:-

Compaction shall be carried out in accordance with the provisions of Clauses 501.6 and

501.6 Compaction: - Bituminous materials shall be laid and compacted in layers which

enable the specified thickness, surface level, regularity requirements and compaction to be

Compaction of bituminous materials shall commence as soon as possible after laying.

Compaction shall be substantially completed before the temperature falls below the minimum

rolling temperatures stated in the relevant part of these specifications. Rolling of the

longitudinal joints shall be done immediately behind the paving operation.

After this rolling shall commence at the edges and progress towards the center

longitudinally except that on super elevated and unidirectional compared portion, it shall

progress from the lower to the upper edge parallel to the center line of the pavement. Rolling

shall continue until all roller marks have been removed from the surface. All deficiencies in

the surface after laying shall be made good by the attendants behind the paver before initial

rolling is commenced. The initial or breakdown rolling shall be done with 8-10 tonnes deal

weight smooth wheeled roller. The immediate rolling shall be done with 8-10 tonnes deal

weight or vibratory roller or with a pneumatic tired roller of 12 to 15 tonnes weight having

nine wheels, with tire pressure of at least 5.6 K.G./Sq.Mt. The finish rolling shall be done with

6 to 8 tonnes smooth wheeled tandem rollers.

Where compaction is to be determined by density of the requirements to prove the

performance of rollers shall apply in order to demonstrate that the specified density can be

achieved. In such cases the contractor shall nominate the plant and the method by which he

intends to achieve the specified level of compaction and finish at temperatures above the

minimum specified rolling temperature. Laying trials shall then demonstrate the acceptability

of the plant and method used.

Bituminous materials shall be rolled in a longitudinal direction with the driven rolls

nearest the paver. The rollers shall first compact material adjacent to joints and then work

from the lower to the upper side of the layer, overlapping on successive passes by at least one-

third of the width of the rear roller in the case of a pneumatic-tyred roller, at least the nominal

width of 300 mm.

In portions with super elevated and un-directional camber, after the edge has been roller,

the roller shall progress from the lower to the upper edge.

Roller should move at a speed of not more than 5 K.M./ H. The roller shall not be

permitted to stand on pavement which has not been fully compacted and necessary precautions

shall be taken to prevent dropping of oil, grease, petrol of other foreign matter on the pavement

either when the rollers are operating or standing. The wheels of rollers shall be kept moist

with water and the spray system provided with the machine shall be in good working order,

to prevent the mixture from adhering to the wheels. Only sufficient moisture to prevent

adhesion between the wheels of rollers and the mixture should be used. Surplus water shall

not be allowed to stand on the partially compacted pavement.

501.7 Joints: - Where longitudinal joints are made in pre-mixed bituminous materials,

the materials shall be fully compacted and the joint made flush in one of the following ways,

only method [iii] shall be used for transverse joints.

[1] By beating the joints with an approved joint heater when the adjacent width is being laid

but without cutting back or coating with binder. The heater shall raise the temperature of the

full depth of material to within the specified range of minimum rolling temperature and

maximum temperature at any stage for the material for a width not less than 75 mm. The

contractor shall have equipment available for use in the event of a heater break down to form

joints by method[iii].

[2] By using two or more pavers operating in echeion, where this is practicable, and in

sufficient proximity for adjacent widths tube fully compacted by continuous rolling.

[3] By cutting back the exposed joint for a distance equal to the specified layer thickness, to

a vertical face discarding all loosened material and coating the vertical face completely with

60/70 penetration grade hot bitumen or cold applied bitumen or polymer modified adhesive

bitumen tape with a minimum thickness of 2 mm before the adjacent width is laid.

All joints shall be offset at least 300 mm from parallel joints in the layer beneath or as directed

and in a layout approved by the Engineer. Joints in the wearing course shall coincide with

either the lane edge or the lane marking whichever is appropriate. Longitudinal joints shall

not be situated in wheel track zones.

Rolling shall be continued until the specified density is achieved or where no density is

specified, until there is not further movement under the roller. The required frequency of

testing is defined in Clause-903.

504.4 Surface finish and Quality control of work:-

The surface finish of the complicated construction shall conform to the requirements of

Clause-902 as under. For control of the quality of materials supplied and the works carried

out the relevant provisions of sections 900 of MORT & H shall apply.

901.1 All materials to be used all methods adopted and all performed shall be strictly in

accordance with the requirements of these specifications. The contractor shall set up a field

laboratory at locations approved by the Engineer and equip the same with adequate equipment

and personnel in order to carry out all required tests and Quality Control work as per

specifications and/or as directed by the Engineer. The internal layout of the laboratory shall

be as per Claurse-121 and/or as directed by the Engineer. The list of equipment and the

facilities to be provided shall be got approved from the Engineer in advance.

901.2 The contractor’s laboratory should be manned by a quarried materials Engineer/Civil

Engineer assisted by experienced technicians and the set up should be got approved by the

901.3 The contractor shall carry out quality control tests on the materials and work to the

frequency stipulated in subsequent paragraphs. In the absence of clear indications about

method aid or frequency of tests for any item, the instructions of the Engineer shall be

901.4 For satisfying himself about the quality of the materials and work, will also be

conducted by the Engineer [by himself, by his Quality Control units or by any other agencies

deemed fit by him], generally to the frequency set forth hereunder. Additional tests may also

be conducted where in the opinion of the Engineer, need for such test exists.

901.5 The Contractor shall provide co-operation and assistance in obtaining the samples for

tests and carrying out the field tests as required by the Engineer from time to time. This may

include provision of labour, attendants, assistance in packing and dispatching and any other

assistance considered necessary in connection with the tests.

901.6 For work of embankment, Sub-grade and pavement construction of subsequent layer of

same or other material over the finished layer shall be done after obtaining permission from

the Engineer. Similar permission from the Engineer shell de obtained in respect of all other

items a work prior to proceeding with the stage of construction.

901.7 The contractor shall carry out modifications in the procedure of work, if found necessary

as directed by the Engineer during the inspection. Works falling short of quality shall be

rectified/ redone by the contractor at his own cost and defective work shall also be removed

from the site of works by the contractor at his own cost.

901.8 The cost of laboratory building including services, essential supplied like water,

electricity, sanitary services and their maintenance and cost of all equipments, tools, materials,

labour and incidentals to perform tests and other operations of quality control according to the

Specification requirements shall be deemed to be incidental to the work and no extra payment

stall be made for the same.

901.9 For testing of samples of soils/soil mixes, granular materials, mixes bituminous

materials and mixes aggregates, etc. sample in the required quantity and farm shall be supplied