WDC 2.0 Kanchanghat Project- Purak DPR F.Y. 2025-26

Name of work :-

Under Workphase Head : WDC 2.O Supplementary DPR- Constructing Farmpond No.4,

Field Outlet 2 Nos., Gabian Structure 11 Nos. at Payarpada

PMKSY – WDC 2.O /02/2021-22 Kanchanghat Project

(Supplementary DPR)

Watershed Committee-: Payarpada

1 Downloading of tender documents(Last Date and Time) 09-03-2026 –18:00

2 Online Submission of bid (Last Date and Time) 09-03-2026 –18:00

Submission of EMD, Tender Fee and mentioned documents 12-03-2026 –18:00

(Last Date and Time)

Technical Bid: Online Verification of documents(Date and 13-03-2026 –12:00

5 Online opening Commercial Bid (Date and Time) 13-03-2026 –12:30

6 Estimated cost of work. Rs.12,41,299/-

Demand Draft of Tender fees from any nationalised bank will

7 be in favour “DWDU DANG PROJECT FUNDBATCH-6” Payable at Rs.900/-

Demand Draft of EMD from any nationalised bank will be in

8 favour “DWDU DANG PROJECT FUNDBATCH-6” Payable at Rs.12,413/-

Tender document issued by: Tender bid submission address :

President Nodal Officer, WDC 2.O,

Village Watershed Committee C/o Project Director, District Watershed

Payarpada Development Unit, Ahwa

Beside DEE (R&B) Panchayat Division-1 Ahwa,

Nr.Shardha Hospital, Taluka Ahwa District

Under WorkphaseHead : WDC 2.O Supplementary DPR- Constructing Farmpond No.4,

Field Outlet 2 Nos., Gabian Structure 11 Nos. at Payarpada.

પ્રોજેકટન ું નામઃ-WDC 2.O/02/2021-22 કાુંચનધાટ પ્રોજેકટ તાલકોઃઆહવા જિલ‍ોઃડાુંગ

જિલ‍ા િ્‍રાવ સવકામ કમત તનતગતનક મુંકજ‍ત િ્‍રાવ સવકામ કામ હેમ હ ્ WDC

કાુંચનઘાટ પ્રોજેકટ મુંજર થમે‍ છે . જેના ગામઃ Galkund, તા.આહવા જી.ડાુંગ હ ્ આ પ્રોજેકટ માટ

1 Jakhana F/620/DANG 23/02/2023 Gujarat/637/dang 23/02/2023

2 Chinchpada (Galkund) F/621/DANG 23/02/2023 Gujarat/638/dang 23/02/2023

3 Galkund F/612/DANG 04/02/2023 Gujarat/629/dang 04/02/2023

4 Pipalpada (Galkund) F/619/DANG 23/02/2023 Gujarat/636/dang 23/02/2023

5 Mohpada (Galkund) F/617/DANG 23/02/2023 Gujarat/634/dang 23/02/2023

6 Vanar F/609/DANG 04/02/2023 Gujarat/626/dang 04/02/2023

7 Ambalia F/615/DANG 04/02/2023 Gujarat/632/dang 04/02/2023

8 Umarya F/610/DANG 04/02/2023 Gujarat/627/dang 04/02/2023

9 Wanki F/618/DANG 23/02/2023 Gujarat/635/dang 23/02/2023

10 Payarpada F/613/DANG 04/02/2023 Gujarat/630/dang 04/02/2023

11 Ranpada F/611/DANG 04/02/2023 Gujarat/628/dang 04/02/2023

12 Bhapkhal F/614/DANG 04/02/2023 Gujarat/631/dang 04/02/2023

13 Bhurapani F/616/DANG 04/02/2023 Gujarat/633/dang 04/02/2023

GST અંગે સ ૂચના

તા. ૦૧/૦૭/૨૦૧૭ થક GST કરમા્ખ ું અમ‍માું આવે‍ છે . જે અનમાર મદર કામમાું GSTમાું દશાણવ્મા

સ ૂચના આપવામાું આવે‍ છે . જે ધ્માને ‍ઈ GSTનાું નવા કરમા્ખા અનમાર ટન્ડર ભરવાના રહશે.

ટન્ડરમાું ભર‍ ભાવો GST તથા અન્મ ટક્ષ મહીતનાું ગણવામાું આવશે પાછ્થક ટન્ડરમાું GSTનાું

૪. ટેન્ડર ફીની રકિન ડીિાુંડ ડ્રાફ્ટ (Payableat.........................)

૫. ાનાની રકિન એફડડીડઇર(Payableat.............................) (પ્રથમ પેઇિમાું દશાણવ્મા મિબ હેમ નું.૮)

> .-એફડડીડઇરડ (e-FDR) ચલાિિાિાું ઇિ્ે નરેિં,

૭. GST રજી‍્રસશનન ું પ્રમાણ પર.

૧૧. WDT સમસવ‍ ઇિનેર/WDT ગ્રકકલચર ક્સમપટણ નક સચના પ્રમાણે કામ કરાવવાના િથ્થાને

૧૮. કામગકરીન ું આખરી બક‍ MDT સમસવ‍ ઇિનેર દ્વારા ચકામણક કમાણ બાદ CC આપવાન ું રહશે.

૨૪. જબ‍નક રકમમાુંથક કપાતપાર બનતક હશે, તે TDS તથા અન્મ િરૂરી કરનક રકમ જબ‍માુંથક

૨૬. સવવાદનક બાબતમાું પ્રોજેકટ ડામરક્સટર્ક, DWDU-ડાુંગ અને ચેરમેન્ક,DWDU- ડાુંગ, જિલ‍ા

કામ પહ‍ાનાું ‍ેવ‍ તથા T.B.M વગેર WDT ઈિનેર પામે ખરાઈ કરાવક ‍ેવા.

૨૯. કામ પ ૂણણ થમા બાદનાું ફાઈન‍ ‍ેવ‍ અને માપ કોન્્રસાક્સટર WDT ઈિનેર/માથે રહી ‍ેવાનાું

રહશે. WDT ઈિનેર દ્વારા ‍ેવામાું આવે‍ માપો માન્મ રહશે અને મમમ મમાણદામાું

MDTઈિનેરદ્વારા ‍ેવામાું આવે‍ માપો માન્મ રહશે.

ઓદફમર અને WDT ઈિનેર પામેથક પ્રમાણકત કમાણ બાદ જે આગ્નક કામગકરી હાથ ધરવાનક

૩૬. કામગકરી માટ જે – તે ખાતાનાું SOR ‍ેવામાું આવ્મા છે , તે આઈટમ માટ જે- તે ખાતાનાું

૪૭. મુંજર થમે‍ ટન્ડરના કામોનો જાણવણક (MAINTANANCE)નો મમમગા્ો બે વર્ણનો રહશે.

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Farmpond Activity No.

SR No. Descriptions Unit Rate Amount

Item No:- 2 Excavation for Foundationin in

all Sorts of soil including,Yellow,

Sandy,Gravelly Soil soft &Hard

Murrum,etc.dry condition including the 280.00 Cu.m 81.50

excaveted stuff in uniform layersin blanksor

1 as directed etc.Complete forlead up to1.0

Km.and all lifts.(By Machinery)

SOR( S.G.) N.W.R.W.S &K.DEPARTMENT.

Item No:- 2 Excavation for Foundationin soft

Rock including disposting the excaveted

stuff as and where directed etc.complete for

lead up to 1 k.m.and all lifts(By Machinery )

SOR( S.G.) N.W.R.W.S &K.DEPARTMENT.

Item No :- 3 Deta board (Bord 0.60m x

0.40m.)Angle40 mmx40mmx6mm 1.00 Nos. 2571.25

3 SOR( S.G.) N.W.R.W.S &K.DEPARTMENT.

P.P.Woven U.V.Staibilised fabric 220 GSM 676.00 Sq.m 86.29

Drawing Activity No.

Name of Activity : Gabian Structure

Qty. Particulars Rate Per Amount

Item No:- (1) Excavation for trialpits, trenches and

quarry expleration in all sorts of soil in cluding

yellow, sandy and gravelly soils, soft murrum in

luding is posing of the excavated stuff as and

where directed etc. complete without dewatering.

S.O.R. N.W.R.W.S & K DEPARTEMENT S.r. No.1 (a)

Item no : (2) Suplying and Laying trap Rubble

stone of UP to10 kg in weight for toe and core

filling including conveying and stacking to

required line m level slope section including all

leads and lifts. Conveyingmaterials from stacks

and laying etc complete.

S.O.R. N.W.R.W.S & K DEPARTEMENT Ch.No.

Item no :- (3) Gabion 1.00mx 1.00m x 0.60m P.P.

Woven 9 mm dia.(100 mmx 100 mm Mesh size)

S.O.R. N.W.R.W.S & K DEPARTEMENT Statement

Item no :-(4) Data board (Board 0.45mx

m,Angle 40 mmx 40mm x 6 mm)

1.00 S.O.R. N.W.R.W.S & K DEPARTEMENT Statement 1172.32 Nos.

Gabian Structure, Drawing Activity No.

Gabian Structure, Activity No.6

Qty. Particulars Rate Per Amount

Item No:- (1) Excavation for trialpits,

trenches and quarry expleration in all

sorts of soil in cluding yellow, sandy and

gravelly soils, soft murrum in luding is

posing of the excavated stuff as and

where directed etc. complete without

S.O.R. N.W.R.W.S & K DEPARTEMENT S.r.

Item no :( 2) Suplying and Laying trap

Rubble stone of 10 to 50 kg in weight for

toe and core filling including conveying

and stacking to required line m level slope

section including all leads and lifts.

Conveyingmaterials from stacks and

laying etc complete.

S.O.R. N.W.R.W.S & K DEPARTEMENT

Item no :- (3) Gabion 1.00mx 1.00m x

0.60m P.P. Woven 9 mm dia.(100 mmx

S.O.R. N.W.R.W.S & K DEPARTEMENT

Statement : 2S.r. No.298 Pg.No.77

Item no :-(4) Data board (Board 0.60mx

0.45 m,Angle 40 mmx 40mm x 6 mm)

1.00 S.O.R. N.W.R.W.S & K DEPARTEMENT 1172.32 Nos.

Statement : 2S.r. No.256 Pg.No.76

Gabian Structure, Drawing Activity No.6 Payarpada

Gabian Structure, Activity No.

Qty. Particulars Rate Per Amount

Item No:- (1) Excavation for trialpits,

trenches and quarry expleration in all sorts

of soil in cluding yellow, sandy and

gravelly soils, soft murrum in luding is

posing of the excavated stuff as and where

directed etc. complete without dewatering.

S.O.R. N.W.R.W.S & K DEPARTEMENT S.r.

Item no : (2) Suplying and Laying trap

Rubble stone of 10 to 50 kg in weight for

toe and core filling including conveying

and stacking to required line m level slope

section including all leads and lifts.

Conveyingmaterials from stacks and laying

S.O.R. N.W.R.W.S & K DEPARTEMENT

Item no :- (3) Gabion 1.00mx 1.00m x 0.60m

P.P. Woven 9 mm dia.(100 mmx 100 mm

S.O.R. N.W.R.W.S & K DEPARTEMENT

Statement : 2S.r. No.298 Pg.No.77

Item no :-(4) Data board (Board 0.60mx

m,Angle 40 mmx 40mm x 6 mm)

1.00 S.O.R. N.W.R.W.S & K DEPARTEMENT 1172.32 Nos.

Statement : 2S.r. No.256 Pg.No.76

Gabian Structure, Drawing Activity No.

Gabian Structure, Activity No.11

Qty. Particulars Rate Per Amount

Item No:- (1) Excavation for trialpits,

trenches and quarry expleration in all

sorts of soil in cluding yellow, sandy and

gravelly soils, soft murrum in luding is

posing of the excavated stuff as and

where directed etc. complete without

S.O.R. N.W.R.W.S & K DEPARTEMENT S.r.

Item no :( 2) Suplying and Laying trap

Rubble stone of 10 to 50 kg in weight for

toe and core filling including conveying

and stacking to required line m level slope

section including all leads and lifts.

Conveyingmaterials from stacks and

laying etc complete.

S.O.R. N.W.R.W.S & K DEPARTEMENT

Item no :- (3) Gabion 1.00mx 1.00m x

0.60m P.P. Woven 9 mm dia.(100 mmx

S.O.R. N.W.R.W.S & K DEPARTEMENT

Statement : 2S.r. No.298 Pg.No.77

Item no :-(4) Data board (Board 0.60mx

0.45 m,Angle 40 mmx 40mm x 6 mm)

1.00 S.O.R. N.W.R.W.S & K DEPARTEMENT 1172.32 Nos.

Statement : 2S.r. No.256 Pg.No.76

Gabian Structure, Drawing Activity No.11 Payarpada

Gabian Structure, Activity No.

Qty. Particulars Rate Per Amount

Item No:- (1) Excavation for trialpits,

trenches and quarry expleration in all sorts

of soil in cluding yellow, sandy and

gravelly soils, soft murrum in luding is

posing of the excavated stuff as and where

directed etc. complete without dewatering.

S.O.R. N.W.R.W.S & K DEPARTEMENT S.r.

Item no : (2) Suplying and Laying trap

Rubble stone of 10 to 50 kg in weight for

toe and core filling including conveying

and stacking to required line m level slope

section including all leads and lifts.

Conveyingmaterials from stacks and laying

S.O.R. N.W.R.W.S & K DEPARTEMENT

Item no :- (3) Gabion 1.00mx 1.00m x 0.60m

P.P. Woven 9 mm dia.(100 mmx 100 mm

S.O.R. N.W.R.W.S & K DEPARTEMENT

Statement : 2S.r. No.298 Pg.No.77

Item no :-(4) Data board (Board 0.60mx

m,Angle 40 mmx 40mm x 6 mm)

1.00 S.O.R. N.W.R.W.S & K DEPARTEMENT 1172.32 Nos.

Statement : 2S.r. No.256 Pg.No.76

Gabian Structure, Drawing Activity No. 12,13,14,15, Payarpada

Field Outlet Activity No.16, Payarpada

No Descriptions Qty.

Unit Rate Amount

Item No:- 1 Excavation for trial pits, trenches

and quarry explerationin all sorts of soil

including yellow, sandyan dgravellys oils, soft

murrum including disposing of the excavateds

1 tuffasandwheredirected etc. complete

without dewatering.

SOR N.W.R.W.S &K.DEPARTMENT.

(a) 0 to 1.50 meter.

Item No:- 2 Providing and laying

Plain/Reinforced cement concrete of

cement, sand and Metal (20 mm to 25 mm

size) in following Proporation liad and situ

including centering,shuttering

2 temping,Smoodh Finishing curing etc.

Complete as directed for all lead and

lift.(Manually with convertional Mixer )

SOR N.W.R.W.S &K.DEPARTMENT.

S.r. No. 18(A) Foundation(ii) Pg.No.

Item No:- 3 Providing and laying uncoarsed

rubble masonary in ordinary portland cement

mortar 1:5 proportion in foundation including

3 curing etc. complete for all lead and lifts.

SOR N.W.R.W.S &K.DEPARTMENT.

Item No:- 4 Providing cement plaster in

various thickness and proportion including

smooth finishing, curing, scaffolding etc.

4 complete for all lead and lifts as under.

SOR N.W.R.W.S &K.DEPARTMENT.

(i) 20 mm thick.

Item No:- 5 Marble Plate Takti (As per Market

Field Outlet, Drawing Activity No. 16 Payarpada

Field Outlet Activity No.17 Payarpada

No Descriptions Qty.

Unit Rate Amount

Item No:- 1 Excavation for trial pits, trenches and

quarry explerationin all sorts of soil including

yellow, sandyan dgravellys oils, soft murrum

including disposing of the excavateds 4.27 Cu.mt 134.20

tuffasandwheredirected etc. complete without

SOR N.W.R.W.S &K.DEPARTMENT.

(a) 0 to 1.50 meter.

Item No:- 2 Providing and laying

Plain/Reinforced cement concrete of cement,

sand and Metal (20 mm to 25 mm size) in

following Proporation liad and situ including

centering,shuttering temping,Smoodh Finishing

2 curing etc. Complete as directed for all lead and

lift.(Manually with convertional Mixer )

SOR N.W.R.W.S &K.DEPARTMENT.

S.r. No. 18(A) Foundation(ii) Pg.No.

Item No:- 3 Providing and laying uncoarsed

rubble masonary in ordinary portland cement

mortar 1:5 proportion in foundation including

3 curing etc. complete for all lead and lifts.

SOR N.W.R.W.S &K.DEPARTMENT.

Item No:- 4 Providing cement plaster in various

thickness and proportion including smooth

finishing, curing, scaffolding etc. complete

4 for all lead and lifts as under.

SOR N.W.R.W.S &K.DEPARTMENT.

(i) 20 mm thick.

5 Item No:- 5 Marble Plate Takti (As per Market Rate) 1.00 Nos 800.00

Drawing Activity No. 17 Field Outlet, Payarpada

Technical Specification

Excavation in all sort of soil strata and formations including depositing the unuseful

excavated stuff as and where directed incl. sorting & stacking useful materials as

required and up to lead of 200mt. and all lifts etc. complete including dewatering.

Specifications and requirement laid down in general technical specification for EARTH

WORK shall apply.

The scope of this item of work includes back filling by quarrying, transporting the

suitable materials from borrow areas or suitable excavated stuff with all lead, all lift and

laying, spreading in specified layer with necessary dressing, finishing, ramming and

consolidation by hand tamping etc. complete.

Specifications laid down in general technical specification for EARTH WORK shall apply.

Suitable materials shall be stacked in piles and same shall only be spread after approval

of department. Spreading in specified layer can be performed by suitable machinery or

by manually. Embankment material shall be free from all perishable or unsuitable

material; if found shall be removed during embankment operation and embankment

shall be cleaned. The bond between old and new earth work/embankment shall be

carried out by loosened the old embankment surface by means plough, ripper or other

suitable method or providing steps as per site condition.

The work shall have to carry out with best workmanship manner with the use of modern

earth work machineries as specified in general technical specifications.

MEARSUREMENT AND PAYMENT:

The payment of this item shall be made on cubic meter basis of the completed work in

all respect. The mode of arriving at quantities payable under this item shall be governed

as mention in general technical specification for earth work.

Providing and laying position” NOMINAL MIX” cement concrete using cement, sand and

H. B. METAL by mass and machine mix for PCC including necessary form works

compaction ramming, curring as directed with all lead & lift etc. complete for

Foundation Concrete other general purpose 2(a) M-10 Metal size 40 to 63mm.

i)CEMENT: Specification m-2 of specification of material section shall apply. ii) WATER:

Specification m-1 of specification of material section shall apply. iii) SAND: Specification

m-3 of specification of material section shall apply. Sand shall be used after proper

screening only.

iv) STONE: Specification m-5 of material section shall apply.

General technical specifications for concrete works shall apply here also. Concrete mix

shall be “NOMINAL MIX” or as decided by engineer in charge, and is to be design by

preliminary tests in the laboratory. The proportions for ingredients shall be by mass

only except for water. The grade of concrete shall be M-7.5 (1:4:8) with M.S.A. 40 or

The scope of work under this item includes doing C.C. at various work locations and

compartments as classified under the item including providing and supplying all

materials labours and use of equipment machinery with providing, erecting and

dismantling of necessary formwork and centring.

The scope of work also incl. laying of concrete in position as directed by machinery or

by manually with compaction by means of needle of surface vibrator together with

finishing the expose surface of concrete work to obtain dense and compact surface,

curing for a specified period etc.

Specifications for workmanship laid down in general technical specifications for

concrete works shall apply here also. The workability of the concrete mix shall be

controlled by maintaining a w/c ratio that is bound to give a concrete mix which is just

sufficiently wet to be placed and compacted without difficulty with the means specified.

MODE OF MEASUREMENT AND PAYMENT:

The rate shall be for a unit of one cubic meter. The consolidated cubical contents of

concrete work as specified in item shall be measured. The concrete laid in excess of

section shown on drawing or as directed shall not be measured. No deduction shall be

i) Ends of beams, girders, joist, steps, posts, etc. of similar materials up to 500 sq.cm. In

section. ii) Opening up to 0.1 sq.mt. in area.

The rate includes cost of all materials, labour, tools and plants required for mixing,

placing in position, vibrating and compacting, finishing, as directed, curing and other

incidental expenses for producing concrete of specified strength. The rate includes cost

Prov. & Laying in position cement concrete using cement, sand and crushed metal

coarse aggregate by mass and machine mix for PCC/RCC including necessary formworks

compaction by vibrator, curing as directed with all lead & lift etc. complete. (Excluding

cost of steel) FOR BODY WALL, APRON, TRAINING WALL, SIDE WALL, SPLAY WALL,

KEY WALL, CUT OF WALL ETC. 4/c Concrete Grade M-15 and MSA-40mm.

i) CEMENT: Specification m-2 of material section shall apply.

ii) WATER: Specification m-1 of material section shall apply.

iii) FINE AGGREGATE: Specification m-3 of material section shall apply.

iv) COARSE AGGREGATE: Specification m-4 of material section shall apply.

General technical specifications for concrete works shall apply here also. Concrete mix

shall be "nominal mix" or design mix as decided by Eng. I/c. and is to be design by

preliminary tests in the laboratory. The proportions for ingredients shall be by mass

only except for water. The grade of concrete shall be M-15 (1:2:4) with size of aggregate

The scope of work under this item incl. doing C.C/ R.C.C. at various work locations and

compartments as classified under the item incl. providing & supplying all materials,

labours and use of equipment machinery with providing erecting and dismantling of

necessary formwork and centeing. The scope of work also incl. laying of concrete in

position as directed by machinery or by manually with compaction by means of needle

of surface vibrator together with finishing the expose surface of concrete work to obtain

dense and compact surface, curing for a specified period of 28 days.

Specifications for workmanship laid down in general technical specifications for

concrete works shall apply here also. The workability of the concrete mix shall be

controlled by maintaining a w/c ratio that is bound to give a concrete mix which is just

sufficiently wet to be placed and compacted without difficulty with the means specified.

MODE OF MEASUREMENT AND PAYMENT:

The rate shall be for a unit of one cubic meter. The consolidated cubical contents of

concrete work as specified in item shall be measured. The concrete laid in excess of

section shown on drawing or as directed shall not be measured.

The rate includes cost of all materials, labour, tools and plants required for mixing,

placing in position, vibrating and compacting, finishing, as directed, curing and other

incidental expenses for producing concrete of specified strength. The rate includes cost

Providing and fixing in position white marble plate of size 45x45x1.8 cm incl. engraving

the letters as per drawing/as directed etc. complete.

MARBLE PLATE:Marble shall be of good quality white of fine grain.

GENERAL: SCOPE OF WORK: WORKMANSHIP:

The scope of item includes providing, engraving letters and fixing marble plate of size

45 X 45x1.80 cm as and where directed with all lead & lift. The work shall be carried out

with best workman like manner. The marble shall be of good quality, fine grained, hard,

uniform and homogeneous in texture. The marble shall have crystalline grain and free

from any defects and cracks. The front face shall be of machine polished one and rear

side shall be rough to provide good bond to cement mortar. The letters of required size,

font and lipi shall be engraved by best artisan as directed by engineer in charge.

The wall surface shall be covered with 10mm thick rough cement mortar 1:3 plaster and

allowed to harden. If it is to be fixed on already plastered surface, then, plaster shall be

roughened by chisel. The rates are inclusive of cement plaster & cement mortar / slurry.

The back of marble plate shall be floated with cement slurry and fixed to the surface by

gentle tapping with wooden hammer. All the four edges shall be flushed with vata. The

work shall be kept wet for seven days.

MODE OF MEASUREMENT AND PAYMENT:

The work shall be paid on number basis of completed work.

GENERAL TECHNICAL SPECIFICATION

1.1 Water shall not he salty or brackish and shall be clean,

reasonably clear 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

of concrete or cause efflorescence’s or attack the steel in R.C.C.

the PH value of water shall generally be not less than

Container for transport, storage and handling of water shall be

clean and only potable water shall be use in the work.

1.2 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 of those which produce objectionable

stains or other unsightly deposits on concrete or mortar surface.

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

1.4 Potable water will be generally found suitable for preparation and

curing of mortar or concrete.

1.5 Testing of water shall be done at Government at his own cost if

directed by Engineer-in-charge.

2.1 The contractor shall have to make his own arrangement to procure the

cement bearing I. S. I. (B.I.S.) mark, directly from the manufacturer or

from the authorized dealers of such manufacturer. For the verification

of such purchases the contractors shall have to produce the bills of

manufacturer or its authorized dealer along with testing details of the

Engineer-in-charge. The cement brought at the site by the Contractor

shall be tested prior to its use in work. For testing of cement one

sample for every lot (one time stacking of cement bag on site of work)

of cement shall be drawn & tested for necessary qualitative

tests, as per I. S. 12269-1987. The cement not satisfying the

criteria, as per I. S. shall be rejected& hence work done by

contractor shall have to remove from the site immediately at his own risk

The cement shall O.P.C. type and shall conform to I.S.I. specifications

cement shall be fresh and stacked at site as directed by Engineer-in-

charge of the work on a dump proof floor and in a weather proof

shed. It shall be stacked on work site to prevent deterioration as

specified, in storage specification of the cement marketing company,

cement which is market from authorized dealer.

2.2 As the cement is available in bags, the contractor shall provide at the

site of work, satisfactory for not less than three months’ average

Consumption on works and shall keep the cement stored in manner

that shall satisfy the Engineer. The arrangement of storage and

utilization shall be such as to ensure the utilization of cement in the

order of its arrival at the storage and the Contractor shall

maintain satisfactory records, which would any time show the dates

of receipt and processed utilization of cement laying in store at site.

2.3 Engineer-ln-charge shall at all time, have an access to the stores at

site and shall authority to check and examine the method of storage,

accounting and security provided by the Contractor. The contractor shall

comply with instruction. The Contractor shall further at all times, satisfy

the Engineer for his demand for the production of records or books or

submission of returns and Performa of other proofs that may be

demanded in order to prove that the cement brought to site being used.

The Contractor shall, at all times keep his records up-to-date to enable

the Engineer to apply such checks as he may desire to impose.

3.1 Sand be natural sand, clean, well graded, hard strong durable and gritty

particles five from injurious amounts of dust clay, kankar, soft or flaky

particles shale, alkali, salts, organic matter, loom, mica or other

substance and shall be got approved from the Engineer-in-charge.

The sand shall not contain more than 5 % of silt as determined by field

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

3.2 The fineness modules of sand shall not be less than 2.6 and exceed

3.3 All the fine aggregates shall confirm to I. S.383-1970 as directed by

Engineer-in-charge.

3.4 Sand for use on work shall natural river sand or crushed sand of

crushed gravel of their mixture in specified prescription. The sand shall

consist of hard, dense, uncoated siliceous grains of such fragment and

shall be free from the injurious of amounts of dust, lumps, soft of flaky

particlesshales, alkali, organic matter, looms, mica and deleterious

3.5 IMPURITIES:

3.5.1 Materials passing on No. 200 B.S.S. Sieve 5 by weight for crushed

gravel for sand, 10 % by weight for crushed rock.

Shale 1 percent by weight

Coal 1 percent by weight

Clay lumps 1 percent by weight

Other impurities 2 percent by weight

3.5.2 Deleterious substance such as Alkali, Mika coated grain and soft flaky

particles shall not be used.

3.5.3 The sum of the percentage of all deleterious substances in any cases

shall not exceed 5 percentages by the weight. Sand be free from organic

The sand shall he graded screen analysis shall confirm one of

gradation limit grading zone I to IV specification in I.S. 383-1970 vide

Table No. Mentioned below.

FINE AGGREGATE TABLE NO.

Percentage Passing

Grading Grading Grading Grading

Zone-I Zone-II Zone-III Zone-IV

3.7 Fineness modules

The sand shall have fineness modulus ranging between 2.6 to 3.2 the

fineness modules being computed by adding cumulative percentage of

sand retained on six standard sieves ranging front 4.75 mm 150 micron

incisive & dividing the sum by

The contractor shall have to make his own arrangement to produce

the steel bearing ISI marks directly from the manufacturer or from

authorized dealers of such manufacturer. For verification of such

purchased, the contractor shall have to produce the bill if manufacturer

of authorized dealer along with testing details to the Engineer-in-charge.

In case of doubt of site by the contractor shall be tested by the

Department as per concrete IS Mild Steel bar reinforcement for R. C. C.

work shall confirm to IS 32-1982 and shall be tested quality. In case of

doubt after conducting the necessary qualitative test as per IS 456-

1978. Department will accept the steel.

The steel not satisfying the criteria as per I.S. shall be rejected and

contractor shall have to remove from the immediately at his risk and

5.0 COARSE AGGREGATE

5.1 Course aggregate shall be machine crushed stones of black trap or

equivalent and be hard, strong, dense, durable, clean and free from skin

and coaling which may likely to prevent proper adhesion of mortar.

Coarse aggregate shall consist of uncoated hard, strong, dense and

durable of locally available stone for 1 :4:8 and crushed black trap

stone for 1: 1½: 3, 1:2:4 and 1:3:6. (In the event of some special

work, the hand broken coarseaggregate may have to use)

5.2 The aggregate shall generally he cubical in shape. Unless special stones

of particular quarries are mentioned, aggregates shall be machine

crushed (Maud broken when specified) from the best black trap of

equivalent hard stone as approved by Engineer-in-charge. Aggregate

shall have no deleterious reaction with cement. The size of the

coarse aggregate for plain cement concrete and ordinary

reinforced cement shall generally be as per the table given below.

Percentage passing for single size aggregate of Percentage passing for graded

normal size aggregate to normal size

Note: This percentage may be varied somewhat by Engineer-in-charge

when considered necessary for obtaining better density and strength

5.3 However exact grading required to produce a dense concrete of

specified strength and desired workability shall be decided

by Engineer-in-charge by carrying out be carried accordingly.

5.4 IMPURITIES:

It shall be free from disintegrated stone soft flaky and elongated,

particles,salt alkali,vegetable,matter and other deleterious

materials in such quantities as to reduce strength and durability

of concrete or to attach steelreinforcement it shall be

generally simply with the I.S. 383-1970. Some of the

important requirements of coarse aggregate as specified in I.S. 38.-

1970 issummarized below

The amount of deleterious materials in coarse aggregate

shall not exceed the percentage of limits given below in Table

No.2. When tested by method described inI.S.2383-1963 and the

sum of percentage of all deleterious materials (except mica) shall

not exceed the limit of 5 percentages.

MATERIALS MAXIMUM PERCENTAGE LIMITS BY

(I) DELETERIOUS

Coal and Lignite 1.00

Clay Lumps 1.00

Soft Fragment 3.00 --

Materials passing 75 microns I.S.

CLAUSE DESCRIBED IN APPPAND1X OF I.S. 383-1970

When required by Engineer-in-charge coarse aggregated shall also be

subject to some of following test as he consider necessary in accordance with the

procedure specified in I. S.383-1970.

5.1 The stone shall he of the sped lied variety such as Granite / Quartz / or any

oilier types of good hard locally available stone obtain from quarries as

approved by the Engineer-in-charge. The stone shall be obtained only

from the approval quarry and shall be hard, sound, durable and other

structural defect to like cavities, cracks, sand, holes, flows, injurious veins,

patches of loose or soft material etc. and weathered portion and other

structural defect of imperfection tending to affect their soundness and

strength. The thickness of the stone shall not be less than 15 Cm. The stone

with round surface shall not be used. The stone shall be such as will not

absorb more than 5 % of water. Stone with weathered skin shall not be used.

5.2 The sample of the stone to be used shall be got approval from Engineer-

in-charge before the work started. Testing of stone shall be done at

contractor’s cost if required as specified by Engineer-in-charge.

(B) WORK PROCEDURE

1.0 ACCURACY OF LINES & GRADES:

The various works shall to be clone true to line, level and grade. The periodical

checking of these by the Government staff does not absolve the contractor of

his responsibility, regarding their accuracy. In case of any deviation or

discrepancy in lines, level or grade, the Contractor shall correct the

discrepancy at his own cost and without any compensation for the

additional work if any involved. Wherever such a discrepancy is found to arise

at the junction of work of different contractor, the relative liability to set right

their respective discrepancy shall be fixed by the Engineer whose decision

shall be final and binding to the rectify the contractor concerned. The Engineer

shall, further have the authority if needed to rectify the discrepancies and

recover the costs from the contractor or contractors according to

proportions, as he may consider reasonable.

2.0 TESTING OF MATERIALS:

2.1 All materials before being incorporated in the work shall be inspected and if

necessarytested before approved by the Engineer-ln-charge.

Any work on which such materials are used without prior inspection and without

approval or written permission of the Engineer-ln-charge is liable to

considered as unauthorized, defective and not acceptable.

2.2 The Contractor shall supply all the materials required to be tested and also

make good at his costs as may be directed by Engineer-ln-charge for his

satisfaction. An authorized representative of the contractor shall remain

present at the time when the samples or course etc. are taken and shall

authenticate the facts, if so required. If the contractor’s agent fails to

remain present as aforesaid samples of cores etc., taken by the Engineer

or his representative shall be considered to be authentic. The contractor shall

however, be informed of the details of such samples and cores etc., having

2.3 The various materials and cubes shall be tested periodically as per

requirement at the Government Approved Laboratory or Q.C. sub division

or GERI and the results given thereby shall be considered correct

and authentic to the contractor. The Contractor shall be given

access to operations and tests that may be carried out aforesaid to

that he may satisfy himself regarding the procedure and

methods adopted, it shall be the contractor’s responsibility to

produce on the work, materials and finished items to the

standard based on the standards based on the laboratory design

2.4 The methods of sampling and testing and the procedures and

standard shall be as laid down by the Engineer-ln-charge from time to

2.5 SAMPLES AND TESTS:

Test of materials and also on the work as laid down will be made by

Government.The contractor shall arrange for collecting and

forwarding the samples to Laboratory as his own cost as may be

required by the Engineer-ln-charge and if so directed shall not lake

use or incorporate in the work any materials represented by any of the

samples, until the required tests have made and materials accepted.

The testing changes for all construction materials shall be borne by

the contractor.

3.0 DEWATERING AND DIVERSION WHERE NEEDED:

(1) The rates also include arrangement for the diversion of water during

construction in the fair weather as well in the monsoon during the ending

period of contract. No payment shall be made for any part of work

materials washed away or damage during the monsoon or other

period and it shall have to be made good by the contractor at his own

cost. It is the responsibility of the contractor to make good repair any

Government property materials to utilized for the present work or

completed part of present work damaged during construction period.

(2) The rate is also inclusive of all labour materials and plants necessary

for the purpose of dewatering, and division as required without any

separate payment in any items of this work.

4.0 CLEARING THE SITE OF WORK:

Trees and Dismantled materials shall be the property of the

Government and shall be carted and stacked at suitable places as

directed by Engineer-ln-charge, and all waste materials decided as

such by the Engineer-ln-charge and All waste materials decided as such

by the proposed site so as not to interface with construction operation.

All clearing operations as above shall be considered as included in

the items of excavation embankment etc. and no extra payment shall

he made for clearing the site work.

5.0 EXCAVATION:

5.1 EXCAVATION IN ALL SOILS INCLUDING HARD MURRUM:

This shall include all excavation done in strata other than rock such

as soil marine clay, chickle, sill, sand, gravel, soft murrum stiff clay,

kankar, hard murrum and other similar materials, all kinds of

disintegrated rock or shale, indulated clay, sand or conglomerate

interspersed with boulder larger than one cubic feet sand or and less

than one cubic yard, which do not need blasting and can be removed

with pick bar, shovel, chisel etc. with same difficulty.

5.2 EXCAVATION IN SOFT ROCK:

This shall include all excavation done in strata which is rock but does not

need blasting and can be removed with pick bar and the shovel. But which

does not come under the category of strata covered under. 2.1 above.

5.3 EXCAVATION IN HARD ROCK:

This shall include all excavation done occurring in masses which can be

removed by blasting. This shall also include rock require to be removed

by chiselling where blasting is not permitted. More fact that blasting has

been restored will not qualify for excavation in hard rock.

5.4 THE DECISION:

The decision of the Engineer-in charge for classification of the strata in

case of dispute shall be final and binding to the contractor.

5.5 UTILIZATION OF EXCAVATED STUFF:

The excavated material as found as able in other items of work shall be

the property of the Government and shall be separated by the

contractor as directed be Engineer-in-charge without any extra

Pay line will be as per specified in hereinafter or the actual line of

the excavation, whichever is less.

The pay line be as per the excavation for the foundation shall be

carried out in line, level as per plan. Design or as directed by Engineer-

Overcuts, beyond specified pay of excavation carried out by the

contractor for any purpose or reason, unless by directed by Engineer-

in-charge shall be at the cost of the contractor. Refilling this overcuts

if required shall be contractor or masonry and that shall be at that cost

of the contractor.

Slips in excavation shall be avoided by means of any necessary shorting

and strutting required during excavation. No extra payment shall be

made for any such operation. However, if any slips occur on account

of any reason, Government shall not be responsible for loss of lives

and other damage done on account of such slips or any other reason.

The excavation affected by slips etc. shall promptly restored to stability.

No claim shall be entertained for such slips and their consequences.

The excavation trenches field up due to monsoon or any other reason

shall be cleared by the contractor directed by Engineer-in-charge

without any extra cost to government.

5.8 DISPOSAL OF EXCAVATED STUFF:

All spoil of excavation shall be removed from foundation and deposited

by the contractor as per instruction of Engineer-in-charge. The

deposited of spoil stuff shall be carefully planned so, is obstruct traffic

lines required for transport of the construction materials of flow of the

water and shall be dumped beyond AHFL line or lead 100 Mt. otherwise

specified andsufficiently away from the edges of excavation to avoid

danger in stability, to permit ample space for lorry installation or

lifting and pumping devices, slaking construction materials etc. All

these operations are included in corresponding item of excavation

and no extra payment shall he made for this.

5.9 LEAD AND LIFT:

Excavation material would be deposited within lead and lift as

specified in the item and in spoil or canal hank in particular section

or at a space as directed by Engineer-in-charge.

6.0 CEMENT MORTAR:

6.1 Water: Water shall conform to specification (A)1.0 of this chapter.

6.2 Cement: Cement shall conform to specification (A) 2.0 of this chapter.

6.3 Sand: Sand shall conform to specification (A) 3.0 of this chapter.

6.4 Proportion of mix : Cement and sand 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 bring equal to 0.034 Cu. M. the mortar may be hand mixed

or machine mixed as directed.

6.5 PREPARATION OF MORTAR:

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

times or more till a homogenous mixture of uniform colour is

obtained. Mixed platform shall be also arranged that no extraneous

material shall gel mixed with mortar shall flow out. While mixing, the

water shall be gradually added and thoroughly mixed to form a stiff

plastic mass of uniform colour so that each particle of sand shall be

completely covered with a film of wet cement. The water cement

ration shall be adopted as directed. The hand mixing shall be carried

out with prior permission of Executive Engineer subject to use of

10 % additional quantity of cement.

In machine mix mortar:

The mortar shall be mixed in mechanical mixer. The mixing shall be

continued until there uniform distribution of materials and

homogenous, uniform colour of mix is obtained. The mixing shall be

done for at least two minutes after required quantities of cement, sand

and water places in the drum. The mixing time will be increased if

required uniformity and consistency is not obtained in mix.

6.6 The mortar so prepared shall be used within 30 minutes of adding

water. Only such quality of mortar shall be prepared as can be used

within 30 minutes.

7.1 SCOPE OF WORK:

The work covered by this chapter consist furnishing nil materials,

equipment and labour for the manufacture, transport, placing, finishing

& curing of concrete in structure included in these section and

performing all functions necessary and ancillary there toetc. complete.

The item of concrete will have to be split up to several item according

to the class of concrete to be used and its location and will be

measured and paid for accordingly. The general section described

here in after shall however, in relevance, apply to all concrete items.

7.2 COMPOSITION:

Concrete shall compose of cement, fine aggregate (natural sand)

machine crushed coarse aggregate (or Hand broken rock) or natural

and screened gravel, and water, all well mixed in proper proportion and

brought to the power consistency. Whenever so ordered by the

Engineer-in-charge, admixtures shall be added as stated in the special

conditions. The exact proportion of each such type of aggregate will

be determined and adjusted from time to time, on mechanical analysis

of the aggregate.

The specification for cement, fine sand, coarse aggregate and water

shall be strictly adhered to as directed above in material section.

Aggregate size in different mix shall be as follow.

MIX COURSE AGGREGATE

Forms to confine the concrete and shape it to required lines shall be

used wherever necessary. The forms shall have sufficient strength and

rigidity to hold concrete and to with stand the pressure or ramming and

vibration without deflection from the prescribed lines, the more so when

the concrete vibrated. The surface of all forms in contact with concrete

shall be clean, rigid water right and smooth Suitable devices shall be

used to hold corners, adjacent ends and edges of panels or other forms

together in accurate alignment. Forms shall be so constructed as to be

removed in section without moving or damaging surface of concrete.

Bolls & rods shall preferably be used for internal ties and they shall be so

cut as to remain 1" (25 mm) behind the surface.Unless or forms to

round of or level the edges of the concrete. Temporary cleaning and

inspection immediately before depositing the concrete. The design of

cantering and form work shall be got approves before erection by the

Engineer-in-charge.

(a) At any stage, any grooves, set back etc. if ordered to be provided

by Engineer-in-charge shall be provided as per the instruction with

no extra cost. Any angle B.S.J., M.S. bars or any steel piece required to

be kept projecting out of the concrete surface or any structural member

like pipe, nuts, rods etc. required to be kept inside concrete. The same

shall be placed in position in concrete, in line and level as per instruction

of Engineer-in-charge and centring done accordingly with no extra

costof the labour and the materials for cantering.

(b) Subsequent connecting work of block left out earlier for any

reasonsshall bedone to required line and level. Such concreting shall

have to be done havingthe progress of the work as per instruction

of the Engineer-in- charge.

7.4.2 RE-USE OF FORMS ETC.:

Forms to be sued more than once shall be maintained in

serviceable condition and shall be thoroughly cleaned and

smoothened before being re-used. Where metal sheets arc used for

lining forms, the steel shall be placed and maintained on form

with the minimum amount of wrinkles, humps or other

imperfections. The use of steel metal to correct imperfection in

surface that will be permanently exposed to view shall not be

permitted. All forms shall be checked for shape.

7.4.3 ERECTION AND REMOVAL OF FORMS:

Before placing concrete surface all the forms shall be oiled with

suitable non-staining of such as raw linseed oil so as to prevent

slicking of concrete to facilitate the removal of forms. In case of wood

forms oil should be capable of penetrating the wood, and of

remaining sufficiently oily to eliminate sticking or preventing

absorption of water and consequent warping.

The oil shall be covering the form fully & evenly without excess over

drip. Care shall be taken to prevent oil from getting on surface of

construction joints and reinforcement bars. Special care shall be

taken for narrow grooves. So as to prevent swelling of the forms

and consequent damage to concrete prior to or during the

removal of forms. Immediately before concrete is placed

precaution shall be taken to see that all forms are in proper

alignment and this angles and are thoroughly secure and tight.

Where forms for continuous surface are placed in successive units

the forms shall fit lightly over completed surface, so as to prevent

leakage of mortar from concrete and to maintain accurate

alignment of the surface.

MACHINE MIXING:

The concrete shall be composed of water, cement, fine

aggregate and course aggregates. Each material being approved by

the Engineer-in-charge prior of the mixing.

The proportion of cement, sand and aggregate mixed for

concrete shall be as per grade of the concrete (i.e. 1:4:8, 1:3:6, 1:2:4

etc.) by weight or by volume as directed by Engineer-in-charge.

When volume batching the volume of 1 bag cement will be

considered as 0.034 cum. The wooden measuring boxes should be

field in loose with the materials. The ingredient of concrete shall

be properly mixed in mixers, designed, so as topositively ensured

uniform, distribution of all the component material throughout the

mass at the end of the mixing period. The mixing of each batch shall

continue for about one and half to two minutes, or as found best

practice, after all materials expect, the full amount of water is in the

mixer. The minimum mixing period specified above assumed proper

control of the speed of the rotation of mixer and of the introduction

of the materials including water. The mixing time shall be

increased when charging operation sails to produce the required

uniformity of composition and consistency within the batch and from

batch inclusive mixing, requiring additional water to preserve the

required concrete consistency, shall be avoided, if in the mixing, the

changing operations are such that the required uniformity of the

concrete is obtain in shorter mixing time than that of the minimum

specified without disturbing the specified needed workability, the

mixing time may be shortened under orders of the Engineer-in-

charge. The first batch of concrete materials, placed in the mixer in

each working period shall contain sufficient excess of cement, sand

and water at the rate of 10 % to coat the inside of drum in order

that the required mortar content of the mix is not reduced. No extra

claim for this shall be considered by the department.

The following general principles shall be followed in preparation of mixing.

(a) The ingredients shall be fed into the mixer simultaneously.

(b) A portion of water (between 5 to 10 p. c.) shall proceed and an equal

quantity shall follow on introduction of other materials. The

remaining water shall be added uniformly and simultaneously with

the other materials.

(c) Care shall be taken that mixing of concrete in the mixer shall be

(d) The mixer shall not be loaded in excess of its rated capacity.

(e) The minimum mixing speed shall not be less than 4 RPM and

peripheral speed of the drum shall be not more than 225 ft./minutes.

(f) The Executive Engineer shall permit the hand mixing and in that

case, the extra 10 % cement shall he added for which no extra payment

HAND MIXING SHALL BE DONE AS FOLLOWS:

Required quantity of cement should be spread on watertight platform

of steel plate, through in uniform layer on lop of measured quantity of

the fine aggregate, so as to have proportion required for the concrete

volume by. Cement and sand shall then be thoroughly mixed, by turning

over four times to be mix uniform colour, this mixer shall be spread evenly

over required quantity of coarse aggregate meta, so as to have

required proportion by volume and mixed dry by running three times till a

homogeneous mix is obtained. Measured quantity of water shall he

added slowly and entire mass turned over. The turning shall he continued

till homogenous Uniform mix is obtained. The hand mixing shall be

permitted by the Executive Engineer and in that case. The

extra 10 % cement shall be added for which no extra payment shall be

The patch shall be placed in position within 20 minutes of its discharge from

the mixer. Any batch remaining unutilized for more than 20 minutes shall

not be allowed to be used in work.

7.6 PLACING OF CONCRETE:

The contractor shall keep Engineer-in-charge informed as to when the

placing of concrete will be performed. Unless instruction is waived in

specified case as directed in writing from Engineer-in-charge. Placing of

concrete shall be performed only in the presence of the authorized

representative of the Engineer-in charge.

Concrete shall be placed only in locations where authorized and no concrete

or mortar shall be placed unit the form works, preparation of surface &

necessary clean up been done & approved. The rock surface rigid masonry

or concrete surface upon or against which concrete is to be placed shall be

concrete surface with reference to relevant specification starting masonry

over old masonry. Before starting the placing of concrete it should be made

certain that the transportation and placing equipment are cleaned and in

proper repair and the equipment along with operation staff is arranged to

deliver the concrete to the final position without any delay or the

objectionable segregation. If concrete is to be placed at night adequate

lighting arrangement as may be directed by the Engineer-in-Charge shall be

made. The method and equipment used for transporting and placing the

concrete of the required consistency in to the work without the

objectionable, porosity or the excessive loss of the workability. All concrete

shall be placed directly in its final position within 30 minutes after being

mixed. Any concrete, which has become so stiff that proper placing cannot

be assured without re-tempering shall he wasted. Excessive segregation

from what so ever cause shall he minimized in handling and operation by

avoiding or controlling the lateral movement of the concrete as in dumping at

an angle depositing continuously at one point and allowing the concrete to How.

Concrete shall not be dropped from height exceeding 2 meter and free fall

should he kept to minimum. Al! surface of form and metal work that have

become in crushed with dried mortar or grout from concrete previously

placed shall be cleaned of all such mortar or grout before surrounding or

adjacent concrete is placed.

The bottom of the foundation and super-structure shall be trimmed and

levelled before concrete is placed. All loose and soft materials shall remove. The

foundation bed shall be thoroughly cleaned and then the concrete shall be

placed in position. Continuous, horizontal layers of maximum thickness of

cms. Each shall be placed and shall be compacted by wooden or iron rammers

Properly mixed concrete shall be placed in position within 30 minutes after the

water is added to the mixer. The concrete shall be laid gently, so as not permit any

segregation of aggregate. It shall than be compacted with tight wooden template

or vibrator till the slurry is formed at surface and compacted thoroughly, so that

no voids or cavity left and dense concrete is obtained, over vibration shall .be

avoided. Concrete shall be protected from direct heat of sum, it shall be covered

after few hours of initial of selling of cement, with gunny bags or socking and shall

be cured by watering for period of 14 days.

When concrete is to be resumed after lapse of time, the surface on which

further concrete is to be done shall be roughened and scrubbed with brush to

remove laitance and shall be swept clean thoroughly.

If the area to be concreted is to be dewatered before laying concrete the

contractor shall make arrangement for pumping out or bailing out stagnant or

[lowing water from foundation, so as to allow concrete operations to be done in

dry conditions without an^ trouble in almost all the stages till concrete has finally

set in position and nothing shall be paid for this dewatering and pumping or

bailing out water.

The concrete shall be thoroughly compacted by means of wooden or iron rammers

during placing till it causes the mortar to cream up and compacted thoroughly so

that no voids or cavities are in the concrete it is thoroughly dense concrete.

After removal of form work in due time, the concrete surface shall-be made free

from honey combing, air holes or any other defects shall be finished in line and

level with the cement.

The work, after its initial set shall be protected from excessive heat of sun or rain

etc. by covering wet gunny bags or by shallow pools of water as directed by the

Engineer in-charge.

Flooding with water by making mud walls 7.50 cm. high shall cure if or covering

with wet sand or earth and kept damp continuously for 14 days.

In case the contractor fails to make satisfactory arrangements for curing on any

day within curing period, department at the risk and cost of the contractor shall

he the same and this amount shall he recovered from the contractor from his next

7.7 TEST FOR CEMENT CONCRETE;

(a) The compression test of concrete shall be on 6"(15 cm.) cubes whenever

applicable. Concrete for test cube shall be taken immediately, it has been deposited

Whenever this is not possible, samples shall be taken as the concrete id being

placed, to obtain the representative sample. A sufficient number of samples each

enough to make one test cube shall be taken at different points, so that the test

cube made from them will be representative of the concrete placed in that position

of that structures selected for test. One set of test cube per every 50 cum of the

concrete deposited shall be taken. The set of six cubes shall be tested for

compressive strength at 7 days and 28 days.

(b) After proper curing of prescribed period this shall be tested as per I. S. I. and

should give compressive strength of not less than,

a.70 kg/sq. cm. for 7 days and 100 kg/sq.cm. for 28 days for a nominal mix of 1:3:6

b.100 kg/sq.cm. for 7 days and 150 kg/sq.cm. for 28 days for a nominal mix of

c.140kg/sq.cm.for 7 days and 200kg/sq.cm. for 28 days for a nominal mix of

(c) The exact proportion in which the different ingredients are to be used for

pans of the work, shall be determined by the Engineer from time to time, during,

the progress of the work and as analysed and the test are made of samples of

aggregates and resulting concrete. No extra payment or deduction shall be made

in the unit rate for variation in gradation and proportion of coarse and

fineaggregate for maintaining gradation as suggested by the Engineer for

achieving required strength of concrete.

(d) Slight variation in the nominal mix shall be made, it makes the concrete

more, dense in order to make the concrete impervious.

(e) At least 80% of the cubes tested shall give the minimum specified strength. No

cubes shall however, give a strength less than 80 % of the specified,

strength, if the lest shows that the concrete blocks result below the

specified strength, such bad quality of concrete shall be removed and

redone by contractor al his own cost.