GENERAL-Rehabilitation works to Mankavu bridge in Kozhikode district-General Civil Work

Amount

Rehabilitation

OD21512/2022-2023:Removing damaged concrete: Loose and delaminated concrete shall be identified and marked before proceeding with the removal. The loose cover concrete including the loose damaged concrete shall be removed upto beyond the corroded bars to a minimum depth of 10 mm behind the reinforcement. Only affected concrete shall be removed and conducting proper investigation, (Good & sound concrete should not be chipped / damaged) by chipping / hacking with chisel and hammer or by mechanical means like light weight chisel hammer, pneumatic chippers, making saw cut at periphery to avoid feather edge for all height and removal and disposal of debris at designated location including all material, labour, tools, temporary supports for structures, electricity, plant and machineries etc. complete as directed by Engineer-in-charge and/or Consultant. Depth of chipping may vary from 20 to 100 mm.

OD21513/2022-2023:Rust remover/Rust Convertor: Cleaning of rust / scales / corrosion from reinforcement bars should be carried out using acid based rust remover, Reebakleens RR of Fosroc or equivalent, or using alkali based rust converters such as Feovert of Krishna Conchem. The material is to be applied to the rusted metal bar, using brush and leaving it to dry for 30 Min. & washing surface with fresh water as required to exposed reinforcement bar at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries complete as per detail specification and as directed by Engineer-in-charge and/or Consultant. The concrete surface area containing the cleaned rebars shall be measured for payment.

OD21514/2022-2023:Anti Corrosive treatment to Steel: Providing & applying inhibition coats/system to exposed reinforcement bars & also new bars, after cleaning & removing scales and rust completely as specified in 1.4, Two component inhibitor Nitozinc Primer std. of Fosroc or MasterEmaco P130 of BASF or equivalent having specific gravity of 1.75 and solid content 57(+/-3) Adhesive bond strength > 1.5 N/mm2, 40 microns DFT per coat as approved by Engineer-in-charge and/or Consultant shall be used as per manufacturer?s specification in two coats at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, necessary surface preparation and necessary protection after and during work. The concrete surface area contianing the rebars where the treatment is carried out shall be considered for measurement.

OD21515/2022-2023:New/Additional steel Reinforcement: Supplying, cutting, fabricating new reinforcement Fe500 for Jacketing, and providing additional steel reinforcement to compensate corroded reinforcement in existing member etc. and fixing with old existing reinforcement which was reduced to 15 % or more of its original diameter as required as provided in original structure and additional steels as directed by EIC and/ or consultant as required tying with 16 gauge annealed binding wire complete as per drawing and specifications for all heights including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant (TMT BARS of various size as required)

OD21516/2022-2023:Anchoring mainsteel and stirrups: Drilling holes of min 4mm larger than new rebar diameter into existing concrete substrate for anchoring of new rebar and depth of Min. 10 times the diameter of rebar and fixing with anchor resin grout Lokfix E (35/55/75) series or Lokfix P or Emfix or chemical anchor material or Masterflow 935 of BASF or equivalent as per NF P 18-831 and NF P 18-836 including cleaning, cutting, fabricating, chemicals, material, labour, tools, temporary supports for structures, electricity, plant and machineries etc. complete as directed by Engineer-in-charge and/or consultant for all heights

OD21518/2022-2023:Injection Grouting-Cement polymer Cement: Providing and fixing Injection ports/nozzles at honeycombed area, cracks in CC, joints of channel and/or in staggered manner on all sides of Member at @ 0.5-0.75 M c/c spacing after drilling holes, to facilitate injecting cement-polymer grout, using quick setting material or epoxy putty and providing and executing injection / pressure grouting in prefixed nozzles/ports using Cement polymer grout (Cement : Polymer ) in proportion of (50:5) with non-shrink admixture Cebex 100 or equivalent and adding water for required consistency till no further grout is accepted by ports using grout pump, at all heights including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant.

OD21520/2022-2023:Galvanic Sacrificial Prevention of steel by Point anodes: Providing and fixing sacrificial zinc anode to prevent initialization of corrosion of reinforcement in adjoining sound concrete due to chloride ingress by installing anodes from VECTOR Galvashield XPI or equivalent for patches at Min. 2 to 4 anodes / Sq.mt. area of concrete (spacing of 300 to 700mm), as per manufacturer specification, covered with mortar with of resistivity less than of parent concrete on the cleaned reinforcement steel including design from manufacturer, installation of Monitoring Box to measure current thrown by Anode as per IS 12696 in range of 0.2 to 2mA/ sq.mt as per manufacturers specification before applying passivation coating at all heights and including of all material, labour, tools, temporary supports for structures, plant and machineries, etc. complete as directed by Engineer-in-charge and/or consultant.( for slabs)

OD21521/2022-2023:Galvanic anodes for sound but contaminated concrete: Providing and fixing sacrificial zinc anodes to control the ongoing corrosion of the embedded steel bars by installing anodes from Vector Galvashield XPI at a spacing of 400 as per the manufacturer's/consultant's specification covered with mortar with of resistivity less than of parent concrete on the cleaned reinforcement steel as per manufacturers specification before applying passivation coating at all heights and including of all material, labour, tools, temporary supports for structures, electricity, plant and machineries, etc. complete as directed by Engineer-in-charge and/or consultant. Paymenet shall be made per nos of the anode installed.( For girders)

OD21522/2022-2023:Polymer Modified Mortar (Pre-Packed): Providing and Applying single component, high strength, fibre reinforced, thixotropic cementitious patch repair mortar that achieves compressive strength minimum of 15 MPa at 1 day and 45 MPa at 28 days and capable of applying upto 50mm thick in single layer such as Renderoc SP40 of Fosroc or Master Emaco S 348 of BASF or equivalent, to the prepared concrete area for thickness up to 50mm, after applying epoxy resin based bonding coat as per manufacturer?s specification, before the bonding agent becomes tack free, initially by hand and finally finishing the same with trowel carefully compacting the same around the rebar and finishing to bring it in line with existing concrete surface on the columns, slabs, beam etc. at all heights, where the thickness of application is less than 50 mm in patches as per specification . Item rate is inclusive of all material including the bond coat, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete and as directed by Engineer-in-charge and/or consultant. (Payment to be made in Sq.M for thickness upto 50mm of PMM for patch area repaired)

OD21523/2022-2023:Microconcrete Reinstatement for thickness more than 50mm for RCC members:- Providing and laying of special repair material micro-concrete for reinstatement of members having thickness of repair more than 50mm and jacketing, using Single component, high strength, high flow cementitious micro-concrete having compressive strength minimum of M40 at 28 days such as MasterEmaco 346 or Renderoc RGL / RGS of Fosroc or equivalent, blended with washed saturated surface-dry (SSD), graded, low absorption, high density, aggregates of size 3mm to 10mm at 50% by weight of micro concrete (if thickness is 100mm or more) and water as per data sheet and pouring into the shuttering if required than use birds beak type form work using suitable arrangement or if required using pumping device for uniform flow of Microconcrete. The side shuttering can be removed after Minimum of 24 hours, preferably 3 days and the bottom shuttering after 7 days ensuring proper bond between the micro concrete and existing concrete substrate at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant. (Payment shall be made in Sq.M for thickness upto 100mm of Microconcrete of area repaired, ) including shuttering work (Only steel reinforcement shall be paid in other relevant items)

OD21525/2022-2023:Protective coatings for Enviornmental face : Providing and applying a single component high build elastomeric, crack - bridging, resistant to CO2 and SO2 and Chloride ion diffusion, UV resistant, breathable acrylic coating using Dekguard S of Fosroc or BASF Masterprotect 300H or equivalent material applied in two coats (Each coat @ 175 micron WFT) on Silone siloxane based primer at an average coverage of 300-400 ml per Sq.mt including proper surface preparation using wire brush, hand grinder or High pressure water jet or copper slag blasting as required to accept coating, acrylic cementitious putty fairing coat like Renderoc FC or equivalent etc. complete as per recommendation of the manufacturer for all heights. Item rate is inclusive of all material, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete as directed by Engineer-in-charge and/or consultant.

OD127064/2023-2024:Providing and fixing double scaffoldingsystem(cup lock type)on the exterior side,upto seven story height made with 40mm dia M.S tube

Appendix-B Dismantling and site clearance

2.1.1:Cutting of trees, including cutting of trunks, branches and removal of stumps, roots, stacking of serviceable material with all lifts and up to a lead of 1000 metres and earth filling in the depression/pit. Girth from 300 mm to 600 mm

2.3.1.A:Clearing and grubbing road land including uprooting rank vegetation, grass, bushes, shrubs, saplings and trees girth up to 300 mm, removal of stumps of trees cut earlier and disposal of unserviceable materials and stacking of serviceable material to be used or auctioned, up to a lead of 1000 metres including removal and disposal of top organic soil not exceeding 150 mm in thickness In area of light jungle - By Manual Means

2.4.2.B:Dismantling of existing structures like culverts, bridges, retaining walls and other structure comprising of masonry, cement concrete, wood work, steel work, including T&P and scaffolding wherever necessary, sorting the dismantled material, disposal of unserviceable material and stacking the serviceable material with all lifts and lead of 1000 metres Prestressed / reinforced cement concrete grade M-20 & above - By Mechanical Means

14.7:Construction of RCC railing of M30 Grade in-situ with 20 mm nominal size aggregate, true to line and grade, tolerance of vertical RCC post not to exceed 1 in 500, center to center spacing between vertical post not to exceed 2000 mm, leaving adequate space between vertical post for expansion, complete as per approved drawings and technical specifications.

14.1.C.1:Furnishing and Placing Reinforced Cement Concrete Grade M30 Using Concrete Mixer in super-structure as per drawing and Technical Specification

55.22:Supplying and laying interlocking tile 100 mm or nearest size thickness, minimum strength M 40 including providing a layer of 6 mm aggregate for 5 cm thickness, then laying interlock cobbles in lines and levels as per the directions of the departmental officers at site inclusive of all cost & conveyance charges etc.; complete.

4.1.A.1:Construction of granular sub-base by providing graded Material, mixing in a mechanical mix plant at OMC, carriage of mixed Material to work site, spreading in uniform layers with a motor grader on the prepared surface and compacting with vibratory power roller to achieve the desired density, complete as per clause 401 Grading-I - Plant Mix Method

14.2:Supplying, fitting and placing HYSD bar reinforcement in super-structure complete as per drawing and technical specifications

14.1.A.1:Furnishing and Placing Reinforced Cement Concrete Grade M20 Using Concrete Mixer in super-structure as per drawing and Technical Specification

5.15:Providing and laying 25 mm thick mastic asphalt wearing course with paving grade bitumen (VG - 30) meeting the requirements given in table 500-40, prepared by using a mastic cooker and laid to the required level and slope after cleaning the surface, including providing an antiskid surface with bitumen precoated fine grained hard stone chipping of 13.2 mm nominal size at the rate of 0.005cum per 10 sqm and at an approximate spacing of 10 cm center to center in both directions, pressed into the surface when the temperature of surfaces is not less than 1000C, protruding 1 mm to 4 mm over mastic surface, all complete as per clause 516

5.2.a:Providing and applying tack coat with bitumen emulsion( RS) using emulsion pressure distributor at the rate of 0.20 - 0.30 kg per sqm on the prepared bituminous surface cleaned with mechanical broom.

5.6.2.a:Providing and laying bituminous concrete with 80-100 TPH hot mix plant producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with a bituminous binder( NRMB) @ 5.4 percent of mix and filler, transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level, and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction as per MORTH specification clause No. 507 complete in all respects For Grading - II (13.2 mm Nominal Size)

8.35:Providing and fixing reflective road studs (Raised Pavement Marker) of ' category A' made out of ASA/HIPS/ABS moulded body with shanks and conforming to ASTM D 4280, strong enough to support a load of more than 13.635 T when tested in accordance with ASTM D 4280, reflective panel confirming to ASTM D 788, and reflectivity conforming to clause 804.4. including installation, drilling, fixing with adhesive etc. with 2 years warranty for the road stud as well as for in field performance as per clause 804.7.3<br> Road Markers/Road Stud with Lense Reflector :-

8.13:Providing and laying of hot applied thermoplastic compound 2.5 mm thick including reflectorising glass beads on Bituminous Surface @ 250 gms per sqm area, the thickness of 2.5 mm is exclusive of surface applied glass beads as per IRC:35. The finished surface to be level, uniform, and free from streaks and holes.

12.8.1.C.1:Plain/Reinforced Cement Concrete in Open Foundation complete as per Drawing and Technical Specifications <br> RCC Grade M20 - Using Concrete Mixer <br>

MOHAMMED KAYANIKKARA

P.K. HAMSA

Dynasoure Concrete Treatment Pvt Ltd

Bidder Name

MOHAMMED KAYANIKKARA

Dynasoure Concrete Treatment Pvt Ltd

P.K. HAMSA

Structural Specialities and Projects India Pvt Ltd