Retrofitting of Circular Water tank capacuty 60000 gallons at Bargat Line, Port Blair and existing Circular Water Tank capacity 0.27 ML at Rajaji Nagar, Garacharma Ward No.24

Amount

Removing loose and broken concrete/ masonary surface by chiselling/ mechanically etc from the RCC wall. roof slab, coloumn, beam and similar structural members cutting edges, cleaning the dismantled portion with wire brush etc to make the reinforcement naked and remove dust, dirt and other foreign particle etc and removing to debris 50 Mtr from site all as specified by Engineer-in-Charge.

Drilling of holes of size 10/12 mm dia to a depth of of 50 to 100 mm into the concrete surface/ crack using rotary cum hammer drill and fixing PVC/ brass nozzles with epoxy based sealant to facilities grouting. The spacing of nozzles shall be as decided by Engineer-in-Charge.

Mixing & Laying high strength epoxy based for grouting over the concrete surface by injecting through the nozzles to strength the weak concrete. The system should have suitable viscosity which will enable it to soak into weak concrete and on subsequent polymerisation bind the loose and weak concrete.

Cutting out existing cracks in concrete surfaces forming grooves of 25 mm X 40 mm size, cleaning the groove thoroughly with blower, applying primer coat of the mix of Base & Hardener with suitable brush to form a film on the surface of groove, filling the groove with putty made by mixing Base, Hardener and river sand and finally applying the sealing coat of the same mix and in the manner primer coat is applied.

Mixing & Laying for applying rust-remover and applying Rust preventive to all exposed reinforcement bars.

Mixing & Laying for reinforced deformed bars 10mm dia and over cut to length cranking bending spirally or hopping ends MS wire annealed not less than 0.9mm dia.

Supplying & Fixing for hard down steel wire fabric not exceeding 3 kg/sqm cut to lengths, bent to shape mild steel wire,(annealed) not less than 0.9 mm dia as in reinforcement as directed by engineer-in-charge.

Mixing & Laying for applying one coat of epoxy bonding coat as per manufacture's instruction to bind old concrete / masonary surfaces of soffit of slab, coloumn, beam and similar structural members for new gunited / cement surface.

Mixing & Laying for pressure guniting 40 mm average thickness in cement mortar 1:3 to all affected RCC structures including necessary scaffolding modyfying with mortar with admixture all as per manufacturer's instructions including making good as directed by the Engineer-in-Charge.

Mixing & Laying for applying curing compound on gunited surface for complete curing as per manufacturer's instructions.

Mixing & Laying for applying polymer modified cement mortar rendering 15mm average thick in CM 1:3 on guniting/ roof/ masonary wall surface duly mixing polymer modifier polymer modified mortar complete finished even and smooth without using extra cement all as specified and as per manufacturer's instructions.

Supplying and applying two coats of High build hydrophobic polyurethane water proofing coating on slab / masonary wall cold applied of spray / brush applied coating with an elongation of 550% and tensile strength of 4.5 N/mm2 as per ASTM D 412, no leakage upto 5 bars of water pressure as per DIN 1048, shore A Hardness of min. 75 as per ASTM D 2240. The system includes base preparation with one coat of epoxy primer resin and epoxy primer hardener. Apply polyurethane water proofing or approved equivalent in two coats to achieve an average thickness of 1.5 mm complete as per Manufacturer specifications.

C.M.ROY CONSTRUCTION (BID ID -59811)

CSE CONSTRUCTION (INDIA) PRIVATE LIMITED (BID ID -59824)