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Underside of bridge deck, railing, etc. of bridges and Piers and Substructures which are not in River Bed Cleaning and drying the surface; applying (@ 0.30 litre per square metre) a coat (DFT of 100-150 micron) of a translucent brown coloured modified phenolic resin based single component high performance polymeric waterproofing compound (sp. gr. 0.87, rosin content nil and a solid content of minimum 0.47%), e.g., PERMAPROOF, with demonstrable properties of resistance to water and acid; applying (@ 0.25 litre per square metre) a top coat of a modified phenolic resin based single component waterproofing compound of grey or other shades (sp. gr. 0.85), e.g., PERMACIL-GA, before the base coat becomes tack-free; permitting the coatings to cure and dry naturally; the 2-coat system shall be impermeable under a waterhead of 20.0 metres. PERMAPROOF : Requirement : 0.30 litre/sqm for underside of bridge deck, railing, etc. of bridges and piers and substructures Rate : Rs. 190.00/litre as of March 2011 PERMACIL-GA (or other shades) : Requirement : 0.25 litre/sqm for underside of bridge deck, railing, etc. of bridges and piers and substructures Rate : Rs. 205.00/litre as of March 2011
Katakhali Bridge Over the Goureswar River at barunhat,hasnabad-Hingalganj Road, North 24 Parganas, West Bangal.
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