Water Proofing Treatment of RCC Roofs with APP (Atactic Polypropylene Polymer) of Residential Quarters of Govinda Township under KGSA of Jamuna Kotma Area.

Amount

Item Description/ Heading

Removal of old tarfelting by manual means including collection and disposal of dismantled tarfelt and rubbish up to lead of 1 Km including necessary tools required as per instruction of Engineer-in-Charge

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer-in-Charge. Nominal concrete 1:3:6 or richer mix (including equivalent design mix)

Grading roof for water proofing treatment with Cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20mm nominal size)

Providing and laying APP (Atactic Polypropylene Polymer) 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 membrane shall be as under: Joint strength in longitudinal and transverse direction at 23°C as 350/300 N/5 cm. Tear strength in longitudinal and transverse direction as 60/80N. Softening point of membrane not less than 150°C. Cold flexibility shall be upto -2°C when tested in accordance with ASTM, D - 5147. The laying of membrane shall be got done through the authorised applicator of the manufacturer of membrane : 3 mm thick

Grading roof for water proofing treatment with Cement mortar 1:4 (1 cement : 4 coarse sand)

Dismantling GI pipes (external work) including excavation and refilling trenches after taking out the pipes, manually/ by mechanical means including stacking of pipes within 50 metres lead as per direction of Engineer-in-charge : 15 mm to 40 mm nominal bore

Labour charges relaying of pipeline above roof after applying roof treatment. 15 mm to 40 mm

Providing and fixing G.I. pipes complete with G.I. fittings and clamps, including cutting and making good the walls etc. Internal work - Exposed on wall (A) 15 mm dia nominal bore

Providing and fixing G.I. pipes complete with G.I. fittings and clamps, including cutting and making good the walls etc. Internal work - Exposed on wall (A) 20 mm dia nominal bore

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