ADDITION ALTERATION TO TROOPS LINE AREA BUILDINFG NO P-102 CVRDE, BHARTHIYAR NAGAR UNDER AGE I RND AVADI, CHENNAI

Material and Labour for repairs to RCC ceiling, pressure grouting / injection grouting with plasticized, non shrink cement / mortar admixture applied in and around areas showing seepage on roof slab, column beam junctions and other location using shaligrout IP/EI from STP Ltd/Dr Fixit Epoxy injection/EPCO-K-HP250 OF M/s Krishna Conchom. (Pressure grouting shall be done at 0.30 m intervals using 12 mm dia nozzle, depth of hole shall be minimum 50 mm for RCC slabs and 100 mm for beams / Columns) Rate include cost of labour, materials, tools, plant, water / Electricity charges, etc. complete all as specified and as directed.

Material and Labour for Chipping the cracked / loose spalled concrete on the soffit of slab / beam using proper tools like hammer, chisel etc. and removing the loose particle completely duly cleaning it with wire brush and removing the dust etc. complete until to reach sound good concrete surface and keeping the surface dry and removing the debris and dumping the same at the nominated locations with all lead and lift etc., complete all as specified and as directed (All labour, materials, tools and plants scaffolding arrangements are to be supplied by the contractor only at his own cost).

Material and Labour for cleaning the existing deteriorated reinforcement by sand blasting / mechanical rotary brushes wherever reinforcement is corroded by more than 30% providing extra reinforcement of new cold twisted CRS bars including cutting, bending and straightening and placing in position complete in all levels and if necessary welding the new bars with the existing rods by over lapping with all lead and lift etc. Complete all as specified and as directed by the Engineer in charge. (All labour, materials, tools and plants are to be supplied by the contractor only at his own cost).

Material and Labour for removing the loose particles rust / mild scale deposits completely duly cleaning it with wire brush / crush sheet etc. and removing the dust etc. complete over the old concrete surface and supply of zinc rich epoxy primer NITOZINC PRIMER and mixing mechanically until it is homogenous with all lead and lift etc. complete all as specified and as directed by the Engineer in charge. (All labour, materials, tools and plants are to be supplied by the contractor only at his own cost).

Material and Labour for applying one coat of rust remover chemicals such as feovert from Krishna conchom/ Rust remover from Dr Fixit/ shali Rustoff from STP/on steel surface including all lead and lift etc. completed all as specified and as directed by Engineer in Charge(All labour, materials, tools and plants are to be supplied by the contractor only at is how cost).

Material and Labour for repair to slab & beam using structural grade ready mixed epoxy mortar such as EPCO-KP-HP-350 Krishna Conchom / Epoxy repair mortar from Dr Fixit / Nitobond AR & RenderocS2 of FOSROC. After surface preparation the substrate should be thoroughly soaked with water (any excess being removed) Prior to applying one coat of Nitobond SBR and scrubbing it well into the surface. Renderoc S2 can be applied as soon as the Nitobond AR become tracky. Place about 2.75 litres of drinking quality water in the mixer and add the supplied liquid polymer part and mix with the machine in operation, add Renderoc S2 powder and mix for 2 to 3 minutes apply the mixed Renderoc S2 to the prepared substrate with a gloved hand or trowel. First work a mini layer of the mortar on to the layer. Thoroughly compact the mortar on to primed substrate. Where thicker sections are required, the surface of the intermediate layer should be scratch keyed and primed with Nitobond AR.

Demolishing cement concrete (unreinforced) manually/ by mechanical means of any description and any position not otherwise specially provided for including disposal of material within 50 metres lead complete all as specified and directed.

Material and Labour for Providing and laying in position with cement concrete 1:2:4 (1 cement : 2 coarse sand (zone-III) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources) with water proofing compound @ 2% of cement weight excluding the cost of shuttering and centring, etc. complete all as specified and as directed. (Water proofing compound will be measured separately).

Material and labour for roof treatment as follows :- (a) Material and labour for chip out the existing loosed bitumen / bitumen membrane completely reach up mother slab, clean the surface thoroughly to make it smooth and clean of any foreign materials, repair the concrete wherever damaged using PMM HS repair, repairing of constructions / cracks / chasing with machine and filled the same with polymerised motor in HS repair, Chopping of 75x75 mm should be made of the junction of wall and raft slab using polymerised cement Mortar 1:4 and mixed with advance latex plus. (b) Applying one coat of 50% diluted self priming PU roof coat. Allow to dry priming coat for 4 to 6 hrs before applying PU coats and surface to be cleaned before applying PU coats. (c) Applying two coats of single components cold applied, water based Polyurethane modified acrylic dispersion with highly elastic and UV resistant water proofing treatment to the roof with HS PU roof coat of Berger of equivalent at 0.6kg/Sqm for each coat without dilution