SPECIAL REPAIR TO P-2 BUILDING AT PASTA LANE, COLABA, MUMBAI UNDER GE (NW) NOFRA

Taking down cement or cement lime plaster of any description on brick or stone walls, etc including raking out joints, hacking for key, scrubbing down with water, etc complete all as specified and as directed.

Demolition of brick work or stone masonary built in cement mortar including all quoins, arches, pillars, etc but excluding ashlar facings, dressed stonework and precast concrete articles.

Material and labour for brick work with sub class "B" bricks, straight or curved on plan exc 6m mean radius, built in CM (1:4), complete all as specified.

Chipping , removing carefullly concrete work by low impact hammer, breakar without damaging the structure & cleaning and disposal of debris out side the premises etc. complete as directed by Engineer-in-Charge. (Note : Hard concrete should not be removed by force.)

Material and labour for cleaning existing reinforcement with wire/rotary wire brush,making the surfaces free from loose material dirt etc, applying two coats of alkaline rust converting primer FEOVERT or equivalent specification confirming to ASTM-B-117, on the rebars, including cleaning the reinforcement, wire brushing to remove loose rust spalls, with time interval of 6 hour between the coats and applying protective coating IPNET-RB complete all as specified and directed.

M&L for Replacement of steel reinforcement with TMT bars of appropriate size where 30% of cross section is reduced including dismantling of rusted steel complete all as specified and directed.

Material & labour for carry out application of Bi-polar migratory corrosion inhibitor EPCO-KP-100/ Protectsil CIT/Ferogard 903 on concrete surface (this inhibitor shall have migratory kind of properly which permits the material to migrate to a virtual extent of 100 mm, through pores of concrete, inhibitor the corrosion and de-passivating the Electro-chemical reaction. It should have properly to attack as well as cathode, which is purely alkaline in nature (pH-9.5), So it has no carcinogen activity with concrete all as per manufacturer's instructions and directed.

M&L for Drilling Holes of 12mm dia, upto 100mm deep holes in structural members at the intervals of 300 to 500mm in staggered manner or along the crack as directed by the Engr-in-charge in RC structural element including Cleaning of the holes by air blower and Inserting 12mm dia. Teflon nozzles compatible with epoxy injector and having machined external end to receive outlet of grouting gun. Fix it inside the holes by applying thixotropic epoxy putty to ensure complete sealing and allow to cure the system for min.8 hrs before grouting including removing nozzle projections, excess putty if any over concrete element grinding, levelling and finishing the external surface, after completion of the work, etc complete.

M&L for Grouting Injecting low viscosity high molecular weight thermosett polymer Monopol 250 H by pressure and using pressure epoxy injector with accessories till nozzles refused to accept the grout, Including Mixing material components part a and part b in required quantities as per mfg instruction by weigh batching Filling the grouting gun with monopol 250 H and maintaining desired pressure in the gun, air compressor and at exit (minimum 3 to 4 kg/Cm2) by a mechanism to monitor both pressure gauges and controlling the same by release valves and release the grout as per requirement simultaneously to grout the structural element through prefixed nozzles till its refusal. Seal the nozzle with thixotropic epoxy putty after the refusal. Note : leakages through other nozzles or cracks are required to be monitored while grouting and such points to be sealed as and when required without any extra cost.