RE-KAMRUP Rural/MMPNA/R_R/01 Rehabilitation of bridge on Dharapur Palashbari Uparhali (Old AT Road) Road (Dharapur Chariali - Upaharali) at Ch. 12.611 Km under Mantrir Path Nabikaran Achani (MMPNA) for the Year 2023-24

Amount

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

Supplying and applying Epoxy based bonding agent Nitobond EP of Fosroc Chemicals or Masterbrace 1414 of BASF /Rearmbond EBA or equivalent @ 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.

Patching of damaged concrete surface with structural grade polymer modified reinstatement mortar to like Fosroc Renderoc S2 /Rearm crete RMHS or equivalent at a thickness of 10 to 20 mm as per instruction of manufracturer and as approved by the engineer . The prepacked repair mortar should have a compressive strength 45 N/Sqmm, Flexture strength 8 N/ Sqmm at 28 Days

Concreting of the structure with free flow nonshrink cementitious microconcrete with Rendorec RG of Fosroc/Rearmcrete MC 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 .

'Repair of joint Grooves with Epoxy Mortar Repair of spalled joint grooves of contraction joints, longitudinal joints and expansion joints in concrete pavements using epoxy mortar or epoxy concrete)

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 cebex 100 of Fosroc Chemicals/ Mastergrout CPG-1 of Choksey Chemicals/ Armgrout additive of Myk arment/Masterflow 150 of BASF 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.

Providing and inserting nipples with approved fixing compound after drilling holes for grouting as per Technical specifications including subsequent cutting/removal and sealing of the hole as necessary of nipples after completion of grouting with Cement/Epoxy.

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

Providing and applying Dekguard E2000 or Masterseal 878 of BASF or Rearmcoat anticarb or equivalent a high performance anticarbonation protective coating system,over the primed surface using an airless sprey or roller at right angle to each other @ covarage 5 Sqm per litre per coat @200 micron wft/100 micron DFT with an intercoat period of minimum 12 hours @35ºC. The covarage per litre for two coat shall be 2.5 Sqm @200 micron DFT. The protective coating system should have Co2 diffusion resistance not less than 240 mm equivalent of air thickness and 60 cm equivalent of 30 N concrete along with water vapour transmission resistance of less than 1m (taywood method), the coating should have static crack accomodation of not less than 2mm (BRE) and adhesion greater than 1 N/sqmm as per BS 1881

Supplying and fixing of rebaring chemicals Fosroc Lokfix E55 S-venylester chemical anchor grout or equivalent for various diameter of reinforcement bar at provided embedment depth as per manufracturer specification and instructions for use in concrete applications as directed by engineer in charge a) 8 mm dia re-bar fastners.

Removal of existing asphaltic wearing coat comprising of 50 mm thick asphaltic concrete laid over 12 mm thick mastic asphalt including disposal with all lift and lead upto 1000m.

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.)

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. '(a) With hydrated lime/cement as filler ( refer table 500-9 of MoSRT&H specification) for Grading-I ( 19 mm nominal size ) (I)'with 60/70 or VG-30 grade bitumen

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 Super ductile (SD) TMT Reinforcement bar of Fe 500 N/ Sqmm

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

Non-destuctive testing with Ultrasonic Pulse Velocity Meter with data storage facility for detection of cracks, voids and other imperfections in Reinforced concrete structures and furnishing the findings thereof in proper comprehensible format , complete as directed by the department.

Conducting Concrete Core tests of 75mm diacores, on concrete stucture, as per stipulated procedures, for determination the equivalent cube compressive strength, concrete of the structures including preparation and furnishing the report showing the findings thereof in proper comprehensible format , complete as directed by the department.

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