SPECIAL REPAIRS TO BLDG NO P-12 AT ZAKHAMA MILITARY STATION UNDER AGE (I) ZAKHAMA

Roughening of old concrete surfaces by picking, cleaning the surfaces by wire brush and also including disposing off the retrieved debris outside the premises / site, complete all as specified and as directed.

M&L for 25mm thick cement concrete (1:2:4) type, B0 (using 12.5 mm graded crushed stone aggregates) as in roof padding over RCC roof, laid in slope as per requirement mixed with water proofing compound as per manufactures instruction, complete all as specified and as directed.

M & L for bedding 15 mm thick in cement mortar (1:3) on RCC roof surfaces finished even and smooth without using extra cement complete all as specified and as directed.

M & L for APP modified roof treatment over existing roof slab etc to be executed through approved authorised applicator of the membrane manufacturer with the following specifications, complete all as specified and directed:- (a) Applying oil bound bitumen primer @ 0.40 litre/ Sqm manufactured by the same manufacturer as that of APP with a density 0.87-0.89 Kg per litre at 25 degree centigrade on the prepared dry surface. (b) Laying 3mm thick APP modified water proofing polymeric membrane reinforced with non woven polyester fibre using butane torch by torch application with 10cm side lap and 15cm end lap. (c) Physical properties of membrane shall be as under:- (i) Membrane weight not less than 3.00 Kg/Sqm. (ii) Non woven polyester weight not less than 160gm /sqm. (iii) Softening point of membrane not less than 150 degree Celsius. (iv) Joint tensile strength-longitudinal not less than 650N/Sqcm and transverse not less than 450 N/Sqcm. (v) Tear strength-longitudinal not less than 300 N & transverse not less than 250 N. (vi) Elongation : > 20% in both directions. (vii) Impermeability/water tightness at 2 Kgf/cm2. (viii) Water absorption,% - Not more than 0.15. (ix) Cold flexibility - (-) 50C. (x) Dimentional stability % change = Maximum 1%. (xi) Heat Resistance - Does not dirp at 1200 C Note : The quoted rate shall also be deemed to include for cutting grooves of size and shape as required in the parapet wall for tackling the APP membrane in the wall including making good the surfaces of groove as well as damaged surfaces of the wall after tackling of membrane in CM 1:3 to match with the adjoining surfaces.

Taking down cement plaster on walls, chajja surfaces, etc including raking out joints, hacking for key, scrubbing down with water complete all as specified and directed.

M&L for 15mm thick rendering in cement mortar (1:4), in two layers, under coat of 10 mm thick & top of 5 mm thick, to other than fair faces of brick or concrete wall surfaces, top layer 5 mm thick mixed with water proofing compound (@ 3% by weight of cement or as per manufacture's instructions), finished even and smooth without using extra cement complete all as specified and as directed. Note : Water proofing compound will be measured and paid separately as "Supply only".

M & L for rendering 10 mm thick in cement mortar (1:6) on fair faces of brick work or concrete surfaces finished even and smooth without using extra cement complete all as specified and as directed.

Supply only integral water proofing compound complete all as specified and as directed.

Demolition of plain cement concrete of any description and in any position not otherwise specifically provided complete all as directed.

M&L for providing 75mm thick PCC (1:2:4) type B1 (using 20mm graded crushed stone aggregate) as in plinth protection, surface finished even & smooth without using extra cement including provision of 10 mm joints (at an interval of 3 metre and turnings) duly filled with fine sand and bitumen in the ratio of 3:1, complete all as specified and directed.