COMPREHENSIVE B/R REPAIR TO INCLUDE SUNKEN FLOOR, REPAIRS TO ROOF, CEILING, DAY TO DAY MAINTENANCE AND OTHER CONNECTED WORKS AT SITE A2 OF NAVAL BASE AREA KARWAR

Demolition of cement concrete of any description in sunken floor or in any position as specified and directed. .

Treatment of sunken floor slab comprises of the following specifications and all as specified:- (i) M&L for cleaning the sunken/ lowered portion of RCC slab surface (including vertical total depth plus skirting height) of floors by wire brush, chisel out any mortar sticking to the surface and brooming completely. 40mm thick average PCC 1:2:4 type B-0 using 12.5mm graded stone aggregate as in padding concrete to achieve proper slope (ii) Rendering of uneven surfaces with 6mm thick CM 1:4 mixed with integral water proofing compound at the rate as per manufacturer's instructions. Fill it with water and check dampness and seepage. Where dampness/seepage is noticed, nozzles shall be fixed and grouting to be carried out (WPC shall be measured and paid separately) (iii) All junctions points of side wall where CI/GI pipes are passing through shall be sealed with epoxy putty. (iv) After drying putty, wash the slab and sides of sunken portion with water and make it clear and clean.

(v) M&L for applying two coats of polymer modified cementious water proof coating as per manufacturer's instruction to bottom and vertical sides up to finished floor level +100mm height. The thickness of two layer shall be 1mm. When the second layer is still sticky,, coarse sand spray shall be carried for the vertical and bottom surface of the sunken portion all as specified and directed. (This item shall be measured and paid separately). (vi) Plaster the bottom and sides up to bottom of the skirting with minimum 20mm thick CM 1:4 mixed with integral water proofing compound as per manufacturer's specification including rounding of corners and junctions sloping towards spout. (WPC shall be measured & paid separately ) (vii) All pipes laid in sunken portion shall be covered with 50mm thick PCC 1:3:6, all round after painting with anticorrosive paint (Black paint shall be paid separately) Note:- Test the water proofed area (ponding test) by filling water for at least 72 hours and tested for leakage seepage and to the entire satisfaction of GE. Test shall be done in presence of reps of PMG and record for each sunken slab shall be maintained. The treatment shall be carried out by authorised applicators of chemicals. Cost of testing shall be deemed to be included in the rate quoted above.

M&L for applying two coats of polymer modified cementious water proof coating as per manufacturer's instruction to bottom and vertical sides up to finished floor level +100mm height. The thickness of two layers shall be 1mm. When the second layer is still sticky, coarse sand spray shall be carried for the vertical and bottom surface of the sunken portion all as specified and directed.

Supply only Integral Water proofing compound complete all as specified and directed.

M&L for PCC 1:5:10 type E-2 using 40mm graded stone aggregate as in sunken floor of toilet complete all as specified and as directed.

Dismantling of single layer Mangalore pattern or similar tiles in roofing all as specified and directed.

M&L for roof tiles, Mangalore pattern class 'AA', interlocking at side joints, laid dry complete all as specified and directed.

All as per item No. 07 above but except tiles

M&L for Ridge or hip tiles to suit Mangalore pattern or roofing tiles, bedded and jointed in cement mortar 1:6 complete all as specified and directed.