The greatest use of pressure grouting is to improve geo- materials like soil and rock. The purpose of grouting is to stabilize a large surface area prone to seepage due to negative pressure where water level is above the basement or sunk tanks. Also used to correct faults in concrete and masonry structures. Pressure grouting can be also used for filling the roof cracks or sunken slab.
Since first usage of grouting in the 19th century, it was performed on the foundation of world’s large dams, in order to reduce the amount of leakage through the rock, and sometimes to strengthen the foundation to support the weight of the overlying structure, which can be of concrete, earth, or rock fill.