Grouting tube is specially designed flexible solid PVC Nitrile Blend
(thermoplastic Rubber) covered by sponge strip strengthened by Nylon
Braiding which is installed in concrete joints to waterproof and seal any
crack or voids in the joint area to eliminate the possibilities of leakage
Grouting hose seals joints watertight and offer a complete maintenance
programme of leakage appears in the future. If water test performed and
voids in the joint are indicated, the voids should be filled with all type
of injecting material micro fine cements or cement slurry. These injecting
materials are highly compatible with concrete.
Concrete surface where reinjectable hoses are to be installed are to be
cleandry, smooth and free from dirt. Grouting tube must be located at as
close as possible as centre line of wall or slab, with only the vent ends
crossing the grouting tube.
Initial injection pressure should be approximately 70-160psi. Once the
injection material has filled the joint area and is to 550-560psi. Maintain
this pressure for 3-5 minutes, allowing for the injection material to
thoroughly penetrate the weak area.
Piston type of pumps shall be used with hydrophilic resin injections.