Injection Grout

Injection grouting is a widely used technique for strengthening and sealing rock, soil and concrete. It is commonly used to create a hydraulic barrier to groundwater flow, underpin foundations and stabilize granular soil. 

One of the most popular flowable particulates used for grouting in soil is bentonite. Bentonite is a type of clay with a large percentage of silica that allows it to expand its volume significantly when wet. Bentonite also does not crystallize or disintegrate, hence as a foundation shifts and settles, the bentonite grout shifts and settles with it. Pumping bentonite waterproofing into the ground will allow it to seek open capillaries of settling backfill, fill them, and expand to seal them – preventing water from seeking that path into the structure. 

Engineers and waterproofing contractors around the world highly recommend the use of bentonite when it comes to preventing water intrusion, although this material is often unrecognized because a lot of people usually refer to it as “mud”. Bentonite grout injection has already been around commercially and industrially for several decades and was a prime method for sealing earthen dams, maintaining cofferdams for temporary water containment, boring tunnels, among others.