Shotcrete concrete uses compressed air to shoot concrete onto (or into) a frame or structure.
Shotcrete is mortar or (usually) concrete conveyed through a hose and pneumatically projected at through a shortcrete nozzle with high velocity onto a surface. Shotcrete undergoes placement and compaction at the same time due to the force with which it is projected from the nozzle.
It can be impacted onto any type or shape of surface, including vertical or overhead areas.
Shotcrete is frequently used against vertical soil or rock surfaces, as it eliminates the need for formwork.
It is sometimes used for rock support, especially in tunneling.
Shotcrete is also used for applications where seepage is an issue to limit the amount of water entering a construction site due to a high water table or other subterranean sources.
This type of concrete is often used as a quick fix for weathering for loose soil types in construction zones.