chemical repair of expansion joints of pipeline from teela morh to loni canal under 270 cusec delhi water supply maintenance scheme. - 1 chemical repair of expension joints of pipeline from teela morh to loni canal under 270 2 injection grouting in rcc structure by fixing g.i. nipples 12 mm threaded on both sides of expansion joint and surface of conduit, injection of non shrink grout with cement slurry at the maximum pressure of 40 psi, removal of g.i nipples and filling of holes with polymer mortar paste. placing of nipples at 0.50 m or less c / c as per requirement at site. 3 drilling and fixing injection packers in rc members including, drilling holes: drilling holes in structural members at the intervals as per recommendation of engineer in charge.cleaning of holes: clean the holes by air blower prior to fixing nozzles. fixing of packers: insert 12 mm dia., 50~75 mm long injection packers in cleaned holes with moisture insensitive epoxy resin based putty or equivalent. cutting of packers: cut the packers by cut of wheel after completionof grouting without damaging structural elements.patching hole:- after cutting of packer we patch the hole on epoxy putty. 4 supply and applysinglecomponent, polyurethane injection foam based system for wet condition and temporary sealing, which cures to a dense flexible foam with a fine cellular structureproduct requirements:viscosity cps 500-1300 at 23°c 5 supply and apply 2 component, elastic, low viscous, solvent free, polyurethane injection resin based systemfor permanent sealing, that does not need the presence of water for hardening reactionproduct requirements:viscosity of mixture < 100 mpa•s ( at +20°c ) capable of penetrating cracks>0.2mm widewith a ce marking ( european conformity ) -> conformance label that product is approved to the essential requirements and under market surveillance 6 add gst on overall cost of works @12% 7 labour cess@1%