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Local treatments (Point Leak and Construction Joint) Arresting water leakages at isolated locations (point leakage) and at construction joints with a putty of cement (OPC or slag), modified with a cementitious quick setting compound (bulk density 0.80 to 0.85 gm/cc and a pH of 7.5 – 8.0 for a 20% aqueous solution at 350C), e.g., PERMAKAR 4, in a weight ratio of 1:10 (1 part of the compound and 10 parts of cement), further modified with a silica waterproofing compound (density not less than 1.53 and a pH of 10.0 – 10.5 for a 5% aqueous solution at 350C), e.g., PERMAKAR 1 having the properties of making cement quick setting and non-shrinking in quantities to suit the water pressure conditions at the site PERMAKAR 1: Requirement : 0.40 kg/each Point Leak and 1.20kg/metre of Construction joint Rate : Rs. 120.00/kg as of March 2011 PERMAKAR 4 : Requirement : 0.095 kg/each Point leak and 0.32 kg/metre of Construction joint Rate : Rs. 88.00/kg as of March 2011 Surface treatment Cleaning the surface; preparing the surface by acid etching; treating the surface with a two layer plaster; the first layer shall be 7 mm thick in case of inside walls and floors of water reservoirs and swimming pools, 6 mm thick for sunken slabs/toilet floors and inside of tunnels, basements, etc. with octadecanoic acid based cementitious waterproofing compound (bulk density not greater than 0.5 gm/cc, moisture content not greater than 2.0% and a free fatty acid not greater than 0.2%), e.g., PERMAKAR 3, and cement in the weight ratio of 3:50 for waterproofing compound and cement; cement-sand (1:2 on floors of basements and tunnels; 1:3 elsewhere) plaster (12 mm thick on floor; 8 mm thick on vertical surfaces and at ceiling) and curing the plastered surface; the treatment shall be impermeable under a waterhead of 20.0 metres. PERMAKAR 3 Requirement : 0.72 kg/sqm for inside of tunnels, basements and toilets and 0.84 kg/sqm for water reservoirs and other water retaining structures where treatment will be in direct contact with water Rate : Rs. 160.00/kg as of March 2011 OTHER MATERIALS/SQM : For mixing with PERMAKAR 3 cement : 12 kg for inside of tunnels, basements and toilets 14 kg for water reservoirs and other water retaining structures
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