In Cement Grouting, pores in granular soil or voids in rock or soil are filled. This is done by injecting grout in a flowable medium. Depending on the application, cement grout is injected under pressure at strategic locations via a single or multiple ports.

It is essential that the particle size of the grout being introduced is aligned with the site-specific geotechnical conditions; this permits the cement grout to enter the pores or voids effectively. Once treated the grouted mass has an increased strength and stiffness, and reduced permeability.