Compaction Grouting


In this method, grout mix is specifically designed so as not to permeate the soil voids or mix with the soil. Instead, it displaces the soil into which it is injected. In granular deposits not at their maximum density, the volume of voids is reduced and the deposit is locally densified. In Compaction grouting a very stiff (say 25-mm slump) mortar is injected into loose soils, forming grout bulbs which displace and densify the surrounding ground, without penetrating the pore spaces in soil.