Details: item no. 1 : raking out the construction joints/monolith joints material completely upto a depth of minimum 100 mm & width of 300 mm on either sides of joint, upstream surface of dam. removing the deteriorated existing guniting and other mortar system, thoroughly cleaning the surface of the joints to remove all the loose particles, fungus and scale formation by using air blower and water jet pressure.monolith joints shall be sealed by epoxy putty. after sealing the joints insert the stainless steel nozzles vertically 1 m center to center for injecting the puf (polyurethane foam) grout. grouting shall be done using highly reactive, two components, solvent free, polyurethene injection resin like masterroc mp 355 st(manufacturer- mbs/basf, ardex, cipy) or equivalent to instantly plug heavy gushing leakages. pre-packed part a and part b shall be injected in 1:1 ratio using a two component injection pump equipped with a static in-line mixer injection nozzle. all the works shall be done as
Sector: Water Resource Department