Void grouting is similar to compaction grouting, but with less stiff grout and slightly higher injection rates.
how it works:
Grout is injected through a drilled in pipe to fill a void.
why you need it:
Nicholson utilizes void grouting in situations where the grout mix needs to have a very limited ability to travel from its point of injection. It’s commonly used to grout abandoned mines, karst solution cavities and water cutoff projects. Recently, low mobility grouting has been used to install micropiles in voided or highly fractured formations.