Public Works Roads Department has published Repair/ Rehabilitation Of The Bridge Located Onghograkachari Hugarjuli Sopai Rowmari Road(Ghograkachi- Mazgaon ) Under Mukhya Mantrir Path Nabikaran Aachani (Mmpna) For The Year 2023-24. Submission Date for this Tender is 12-12-2023. Bridge Work Tenders in sonitpur Assam. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Chipping of deteriorated concrete and removal of all loose &friable materials and fully exposing rusted reinforcement followed 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 |
| 2 | Replacementof corroded reiforcement 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/IRCcodes and costsof gas ,weldind rods ,higher charge of welding machines etc. including formwork as required .(reinforcement to be measured and paid seperately) |
| 3 | Supplying and applying two coats of Zinc rich anti-corrosive protective coating with "Nitozinc primer" of Fosrocor euivalent @ 0.20 Lit per Sqm over thoroughly cleaned and prepared steel barsincluding formwork as directed and specified by the department complete. |
| 4 | Supplying and applying Epoxy based bonding agent Nitobond EP of Fosroc Chemicals or MasterBrace 1414 of BASF 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. |
| 5 | Patching of damaged concrete surface withstructural grade polymer modified reinstatement mortar to like Fosroc Renderoc S2 or equivalentat a thickness of 10 to 20mm as per instructions of manufacturer and as approved by the Engineer.The prepacked repair mortar should have a compressive strength 45 N/mm²,Flexture strength 8 N/mm² at 28 Days. |
| 6 | 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) |
| 7 | 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 orMastergrout CPG-1 of Choksey Chemicals or 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 . The grouting operation pressure shall be 2Kg/sq.cm.Cutting the exposed nozzle after the grouting with a good cutter to make the surfacefree 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. |
| 8 | 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 |
| 9 | Sealing of crack / porous concrete with Epoxy Grout by injection through nipples complete as per clause 2803.1. |
| 10 | Providing and applying Deckguard E 2000 or Masterseal 878 of BASf or equivalenta High Performance Anticarbonation Protective Coating System, over the prime surface using an airless spray or roller at right angles to each other @ coverage of 5 Sqm per litre per coat @ 200 microns wft / 100 microns DFT with an intercoat period of minimum 12 hrs @ 35ºC. The coverage per litre for 2 coats shall be 2.5 Sqm @ 200 microns DFT. The protective coating system should have CO2 diffusion resistance not less than 240mm equivalent of air thickness and 60cm equivalent of 30N concrete along witha water vapour transmission resistance of less than 1.0 metre (Taywood method), the coating should have static crack accommodation of not less than 2mm (BRE) and adhesion greater than 1.0 N/mm² as per BS 1881. |
| 11 | Supply and fixing of rebaring chemical Fosroc LOKFIX E55 S- Vinylester Chemical anchor grout or equivalent for various diameters of reinforcement bar at provided embedment depth as per the manufacturer’s specification and instructions for use in concrete applications as directed by Engineer in chargea)8mmdiarebarfatner |
| 12 | Supplying, fitting and placing TMT bar reinforcement in sub-structure complete as per drawing and technical specificationsSuper ductile (SD) TMT Reinforcement bar of Fe 500N/Sqmm |
| 13 | 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. )forRCCRailing |
| 14 | Non-destuctive testingwith 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. |
| 15 | Conducting Concrete Core tests of75mm 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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