Package No. BPSTRD/SOPD-G/2020-21/Pak-10

Amount

Patching of damaged concrete surface with polymer concrete and curing compounds, initiator and promoter, available in present formulations, to be applied as per instructions of manufacturer and as approved by the Engineer.

Sealing of crack / porous concrete with Epoxy Grout by injection through nipples complete as per clause 2803.1.

Chipping of deteriorated concrete and removal of all loose & friable materials and fully exposing rusted reinforcement followed by proper cleaning and removing of rusts and other foreign materials using sand blasting/ emery cloths/ wire brush etc. including formwork as directed and specified by the department complete

Replacement of corroded reinforcement by cutting and welding new reinforcement of minimum 20mm dia. including lapping on both sides to the specified length as directed and as per relevant IS/IRC codes and cost of gas ,welding rods,higher charge of welding machines etc. including formwork as required.(Reinforcement to be measured and paid seperately)

Anticorrosive treatment Supplying and applying two coats of Zinc rich anti-corrosive protective coating with'Techguard 102' of Choksey Chemicals or euivalent @ 0.50 Lit per Sqm over thoroughly cleaned and prepared steel bars including formwork as directed and specified by the department complete.

Bonding between old and new concret surfaces Supplying and applying Epoxy based bonding agent Masterbond EP of Choksey Chemicals or euivalent @ 0.50 Lit pe sqm after totally saturating the cleaned concrete surface with clean water for proper bonding of old and new concrete including formwork as specified and directed by the department complete.

Providing and applying coating of the cleaned patches with two part of polymer based bonding agent Nitobond SBR of Fosroc or equivalent @ 0.22 Lit per Sqm prior to application of polymer modified mortar with brush after totally saturating the cleaned concrete surface with clean water for proper bonding of old and new concrete including formwork as specified and directed by the department complete.

Concreting of the structure with free flow nonshrink cementitious microconcrete with Rendorec RG of Fosroc or equivalent after proper mixing with cleanwater including formwork followed by proper curing for 28 days as per manufacturer's specifications complete and as directed by the Department .

Structural Strengthening with carbon Fibre: Patching in depression of concrete surface wherever necessary by laying epoxy putty , Nitocote VF of Fosroc Chemicals or equivalent @ 1 Lit per sqm after proper surface preparation and proper scraping of concrete protrusion as specified and directed by the department complete including formwork .

Applying Nitowrap 410 saturant Fosroc Chemicals or equivalent with wet film thickness @ 250 microns (0.27Lit per sqm) over a coat of saturant epoxy primer Nitowrap 30 of Fosroc Chemicals or equivalent @ 0.11Lit per sqm with brush followed by fixing carbon fibre composite system Nitowrap EP (CF) of Fosroc Chemicals or equivalent by pressing on the saturant and impregnate the same by applying a final coat of Nitowrap 410 saturant Fosroc Chemicals or equivalent as specified and directed by the department complete including formwork.

Applying two coats of UV resistant coating Nitowrap 512 of Fosroc Chemicals or equivalent over fibre system having wet film thickness of 100 micron @ 0.11Lit per sqm as specified and directed by the department complete including formwork.

Providing & fixing 16mm dia MS nozzles in a grid of 1m c/c up to the half of the thickness of the concrete structure.A grout slurry of neat cement & chloride free expanding grout Mastergrout CPG-1 of Choksey Chemicals or equivalent @ 0.5% by weight of cement water cement ratio 0.35 to 0.40 and viscosity not more than 1.02 centipoise with grouting pressure till the refusal of injection grout Mastergrout CPG-1. The grouting operation pressure shall be 2Kg/sq.cm.Cutting the exposed nozzle after the grouting with a good cutter to make the surface free from the grouting pipes and to seal the gap with plugging compound Masterplug of Choksey Chemicals as per the specification and the direction of the department complete including formwork.

Applying 2-coats of anti-carbonation - a protective coating Techguard 103 of Choksey Chemicals or equivalent @ 0.275 Lit per sqm with brush over exposed portion of the concrete structure of the bridge & other structure works etc. complete as desired to protect the reinforced concrete by preventing the process of carbonation and directed by the department including formwork.

Painting on concrete surface (Providing and applying 2 coats of water based cement paint to unplastered concrete surface after cleaning the surface of dirt, dust, oil, grease, efflorescence and applying paint @ of 1 litre for 2 Sq.m. ) For RCC Railing

Providing, placing and fixing in position Chemical rebar fastners (of M/s Hilti or M/s Sika or approved equivalent conforming to Europian standard CSTB/ETA and Civil Aid standard) of vaious diameters in Piers, Pier caps, including drilling holes of specified size and depth, cleaning holes, placing chemicals inside the holes and fixing reinforcing bars as per specifications of the chemical rebar supplier, and under supervision of the authorized representative of the supplier and conducting pull-out test of atleast 5% of total nos. of chemical re-ba fastners (cost of reinforcing bars to be paid seperately) all complete as per specification as directed byb the department. a) 12 mm dia re-bar fastners.

b) 16 mm dia re-bar fastners.

c) 20 mm dia re-bar fastners.

Greasing of Bearing with ULTRATACK AP3 grease including cleaeing of bearings with steel brush, removal of dusts and dirt with necessary scaffolding etc. complete as directed by the department.

Labour for replacement of Bearings complete as per Technical Specification (Cost of bearing to be paid extra)

Supplying, fitting and fixing in position true to line and level forged steel roller bearing conforming to IRC: 83(Pt.-1) section IX and clause 2003 of MoRTH specifications complete including all accessories as per drawing and Technical Specifications.

Supplying, fitting and fixing in position true to line and level cast steel rocker bearing conforming to IRC: 83(Pt.-1) section IX and clause 2003 of MoRTH specifications complete including all accessories as per drawing and Technical Specifications.

Labour for Lifting of superstructure span by jacking up from below i.e. by placing the jacks on pier/abutment caps for span length of 30m. (Cost of bearing to be paid extra) (Rectification of Bearings as per Technical Specifications) Lifting with constructing auxilary structure upto 6M height including dismentling and removal of same

Replacement of Expansion Joints complete as per drawings

'Compression Seal Joint (Providing and laying of compression seal joint consisting of steel armoured nosing at two edges of the joint gap suitably anchored to the deck concrete and a preformed chloroprene elastomer or closed cell foam joint sealer compressed and fixed into the gap with special adhesive binder to cater for a horizontal movement up to 40mm and vertical movement of 3mm.)

Dismantling of Cement Concrete Pavement (Dismantling of cement concrete pavement by mechanical means using pneumatic tools, breaking to pieces not exceeding 0.02 cum in volume and stock piling at designated locations and disposal of dismantled materials up to a lead of 1000metres ,stacking serviceable materials and unserviceable materials separately.)

Supplying, fitting and placing TMT IS:1786 (Fe 500) bar reinforcement in sub-structure complete as per drawing and technical specifications TMT-IS 1786 ( Fe-500 D) Secondary Producer (ISI approved)

Cement concrete for reinforced concrete in pile cap complete as per drawing and Technical Specification including providing plasticiser ( Masterplast PL-1/SPL-2 or equivalent ), air entraining and water reducing plasticiser ( Masterplast PAE or equivalent) and accelerating plasticiser ( Masterplast ACPL or equivalent) conforming to IS-9103-1999. RCC Grade M30 Using concrete mixer.

Construction of single lane ramp (as per drawing and technical spcification) for movement of traffic during rehabilitation work of bridge consisting of track way,decking, bearing beam ,railing and rail post made with timber and R.S.Joist beam over lifting superstructure end and necessary temporary barricade and appropriate traffic signaling for both day and night and dismantling after completion of rehabilitation works

Raju Mesh