Rehabilitation of RCC bridge No. 9/1 on Barpeta Baghbor road under SOPD G for the year 2019-20,

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 cracks/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 25mm 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)

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.

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 .

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.

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.

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. b) 16 mm dia re-bar fastners.

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. 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 specifications ( 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

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) Replacement of Expansion Joints complete as per drawings

Strip Seal Expansion Joint (Providing and laying of a strip seal expansion joint catering to maximum horizontal movement upto 70 mm, complete as per approved drawings and standard specifications to be installed by the manufacturer/supplier or their authorised representative ensuring compliance to the manufacturer's instruction for installation).

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.)

Dismantling of Flexible Pavements (Dismantling of flexible pavements and disposal of dismantled materials up to a lead of 1000 metres, stacking serviceable and unserviceable materials separately) By mechanical means Bituminous course

Bituminous Concrete (Providing and laying bituminous concrete with 100-120 TPH batch type hot mix plant producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with bituminous binder @ 5.4 to 5.6 % of mix and filler transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the reqd. grade, lavel and alignment,rolling with smooth wheeled,vibratory and tandem rollers to achieve the desired compaction as per MoSRT&H cl. no.509. complete in all respect. (including carriage of mixed materials up to 10.0 Km initial lead from mixing plant )( Including cost of testing of materials at site and laboratory as directed by the deptt.) (a) With hydrated lime/cement as filler ( refer table 500-9 of MoSRT&H specification) (I)'with 60/70 or VG-30 grade bitumen For Grading I ( 25 mm nominal size)

Dense Graded Bituminous Macadam (Providing and laying dense bituminous macadam with 100-120 TPH batch type HMP producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with bituminous binder @ 4.0 to 4.5% by weight of total mix and filler transporting the hot miox to work site,laying with a hydrostatic paver finisher with sensor control to the reqd. grade, lavel and alignment,rolling with smooth wheeled,vibratory and tandem rollers to achieve the desired compaction as per MoSRT&H cl. no. 507. complete in all respect. (including carriage of mixed materials up to 10.0 Km initial lead from mixing plant )( Including cost of testing of materials at site and laboratory as directed by the deptt.) (a) With hydrated lime/cement as filler ( refer table 500-9 of MoSRT&H specification) (I)'with 60/70 or VG-30 grade bitumen For Grading I ( 40 mm nominal size)

Supplying fitting and placing TMT IS 1786 ( Fe 500) bar reinforcement in sub structure complete as per drawing and technical specifications (b) TMT- IS 1786 ( Fe 500) Secondary producer ( ISI Approved)

Replacement of damaged concrete railing

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

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 Plain surface

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 Plain

Metal Beam Crash Barrier (Providing and erecting a "W" metal beam crash barrier comprising of 3 mm thick corrugated sheet metal beam rail, 70 cm above road/ground level, fixed on ISMC series channel vertical post, 150 x 75 x 5 mm spaced 2m center to center, 1.8 m high, 1.1m below ground/road level, all steel parts and fitments to be galvanized by hot dip process, all fitting to conform to IS:1367 and IS:1364, metal beam rail to be fixedon the vertical post with a spacer of channel section 150mmX75mmX5mm, 330mm long complete as per clause 810.)

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. Using concrete mixture

Construction of single lane ramp ( as per drawing and technical specification) for movement of traffic during rehabilitaion work of bridge consisting of track way decking bearing beam railing and rail post made with timber and RS Joist beam over lifting superstructure and necessary temporary barricade and appropriate traffic signalling for both day and night and dismantling after completion of rahabilitation works

Praparation of Design and drawing , site survey, quantity estimation as per actual

M/s Macrocosm Builders