DG - WALUJ INDUSTRIAL AREA. M AND R to Centralized water supply scheme at Waluj. Under water strengthening and repairs of wall of jackwell.

Underwater for high pressure underwater epoxy grout: Grouting with Water Insensitive Underwater Epoxy Grout Base and hardener shall be mixed with using hand held heavy duty electrically operated mixing machine until uniform mix is obtained. The mixed material shall be poured in to the high pressure grouting machine container and grouted through the non-return nozzle already fixed on cracks. The grouting shall be done from the bottom of crack until grout rejects of all other grouting ports. The grouting shall be carried out with the help of divers and underwater communication device to know the conditions. The item includes the cost of all materials, hire charges for all machineries and all charges for divers with accessories etc., complete.

Underwater P/Fixing the Nozzle for high pressure underwater epoxy grout: Drilling hole of 12/ 18 mm dia to a depth of minimum 100 mm across the crack to an angle of 45° @ 500 mm C/C, using pneumatic drilling machine without disturbing the epoxy mortar filled on the "V" groove with the help of divers. The nozzle shall be inserted in the drilled hole and fixed using the under water polyester resin grout and allowed for curing for final set. The item includes the cost of all materials, hire charges for all machineries and all charges for divers with accessories etc., complete.

Supply of special ready to use cementicious material consisting long chain molecules, entangling and restraining the mobility of free water in cement mortar to prevent/reduce wash, antiwash out ready to use material for underwater repairs of any structure. The material shall have comprehensive strength not less than 20 mPA confirming to CRD-C 61-89A test method for determining the resistance of freshly mixed concrete to washing out in water.