SPECIAL REPAIR TO BUILDING NO P-64 ORs MD ACCN AT SRC RAMGARH CANTT

Taking down complete existing treatment of roof/ parapet , Mud puska on roof /parrapet including plastering, brick tiles, stone slabs and leeping any thickness including removal etc complete all as specified and directed.

M&L Brushing neat cement slurry (3 Kg of cement per Sqm) mixed with water proofing liquid in the proportion,water proofing liquid, water & cement (1:4:8) or as per manufacture instructions for bonding of old concrete surface to new concretecomplete all as specified and directed.

M&L PCC 1:2:4 type B-0 (using 12.5mm graded crushed stone aggregate) mixed with integral waterproofing chemical compound mixed in proportion 200 milliliter per 50 Kg cement as in padding, benching,Sunken portion etc on roof surface for correcting/making proper slope on roof, etc complete all as specified and directed.

M & L cutting 75 mm wide and 65 mm deep in brick wall / PCC block / RCC surface any location shaping horizontal face grooves filled with PCC 1:2:4 type B-0 using 12.5 mm graded crushed stone aggregate with and including water proofing chemical compound mixed in proportion 200 milliliter per 50 Kg cement or as per manufacturers instructions laid when concrete is still green complete all as specified and as directed.

M&L Rendering 10 mm thick in cement mortar 1:4 on concrete / brick surfaces with liquid water proofing compound @ 200 ml/50 kg per bag of cement or as per manufacturer instruction finished even and smooth without using extra cement over roof / sunken slab /wall complete all as specified and directed NOTE : water proofing liquid will be measured and paid separately .

M & L for application of water proofing treatment using APP modified roof membrane over non accessible/ non approachable RCC roof slab / chajjah / canopy / parapet wall( horizontal/vertical surface) to be executed through approved applicator of the membrane manufacturer/authorized applicator of the manufacturer with following specification etc complete all as specified and directed :- (a) Cleaning existing surface properly with wire brush & apply 10 mm thick plaster /rendering in cement mortar (1:4) mixed with liquid water proofing compound @ 200 ml/50 Kg of cement or as per manufacturer's instructions (b) Applying approved bituminous based primer( conforming to IS: 3384-1995) @ 0.30 litre / Sqm manufactured by the same agency as that of APP membrane with a density 0.87-0.89 Kg per liter at 25 degree centigrade on prepared surface (c) Laying not less than 3mm thick APP (Atactic polypropylene Polymer modified prefabricated membrane) modified water proofing membrane weighing not less than 3.00 Kg/Sqm reinforced with non woven polyster fiber weight not less than 160gms/Sqm using butane torch by torch application with 10cm side laps and 15cm end lap. Physical property of membrane shall be as under :- (i) Membrane weight not less than 3.00 Kg/Sqm. (ii) Non woven polyester weight not less than 160 gms/Sqm. (iii) Softening point of membrane not less than 150 degree Celsius. (iv) Joint tensile strength-longitudinal not less than 150 Kg / Sqcm and transverse not less than 450 Kg /Sq.cm at 230 degree Celsius. (v) Tear strength - longitudinal not less than 300 N & transverse not less than 250N. (vi) Elongation of reinforcement not less than 30%. (vii) Impermeability under water pressure not less than 3 Kg/Sqcm. (d) APP modified polymeric membrane shall be laid using butane torch by Torch application with minimum 10cm side overlap and 15cm end lap. (e) Applying two coat of bituminious based Aluminium Paint @ 0.3 Kg /sqm over APP Membrane.

M&L for roof treatment in repair by complete removel of existing old treatment and treated with following specifications :- (a) Priming plastered surface of roof by applying oil based bitumen primer @ 0.30 ltr/Sqm on plastered surface till the surface is properly impregnated. (b) Applying APP based polymeric membrane 3mm thick and weight should not less than 3 kg/sqm and sealed the joint with torch application. (c) Applying a coat of hot air blown grade bitumen of grade 85/25 @ 1.2 Kg/ Sqm.

S&F Heat Resistant Terrace Tiles (300 mm x 300 mm x 20 mm) with SRI (solar refractive index) > 78, solar reflection > 0.70 and initial emittance > 0.75 on waterproof and sloped surface of terrace, laid on 20 mm thick screed bed /cement sand mortar in the ratio of 1:4 (1 cement : 4 coarse sand) and grouting the joints with mix of white cement & marble powder in ratio of 1:1, including rubbing and polishing of the surface upto 3 cuts complete, including providing skirting upto 150 mm height along the parapet walls in the same manner complete all as specified and as directed.

M& L for applying evenly a tack coat of industrial bitumen 85/25 grade at the rate of 1.20 kg per sqm in sunken portion including cleaning of surfaces complete.after treatment the same shall be tested for leakage/seepage/ dampness by ponding with water for 72 complete all as specified and as directed.

M & L 50 micron thick polythene film laid on a coat of bituemen primer @ 0.5 Kg per Sqm sunken floor etc complete all as specified and directed.