Details: providing and laying damp-proof course 40mm thick with cement concrete 1:2:4 (1 cement : 2 coarse sand (zone-iii) derived from natural sources : 4 graded stone aggregate 12.5mm nominal size derived from natural sources). extra for providing and mixing water proofing material in cement concrete work in doses by weight of cement as per manufacturer's specification. 12 mm cement plaster finished with a floating coat of neat cement of mix 1:3 (1 cement: 3 fine sand). providing and laying 3mm thick app modified prefabricated five layer, 3 mm thick water proofing membrane, black finished reinforced with glass fibre matt consisting of a coat of bitumen primer for bitumen membrane @ 0.40 litre/sqm by the same membrane manufactured of density at 25°c, 0.87 - 0.89 kg/litre and viscocity 70 - 160 cps. over the primer coat the layer of membrane shall be laid using butane torch and sealing all joints etc., and preparing the surface complete. the vital physical and chemical parameters of the membran
Sector: Police and Internal Security