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Shotcrete is an all-inclusive term for spraying concrete or mortar with either a dry or wet mix process. However, shotcrete may also sometimes be used to distinguish wet-mix from the dry-mix method. The term shotcrete was first defined by the American Railway Engineers Association (AREA) in the early 1930s. [6]
The primary advantages of fibre-reinforced shotcrete are: Addition of steel fibers into the concrete improves the crack resistance (or ductility) capacity of the concrete. Traditional rebars are generally used to improve the tensile strength of the concrete in a particular direction, whereas steel fibers are useful for multidirectional ...
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. There are two application methods for shotcrete.
Soil nailing evolved from the New Austrian tunnelling method, which is a system for underground excavations in rock.This method consists of passive steel reinforcement in the rock followed by the application of reinforced shotcrete.
Recently Conco has taken a role in the developing field of sculpted shotcrete, which is the use of concrete as a canvas to create shotcrete walls that have structural integrity but are aesthetically pleasing. Shotcrete provides an excellent alternative to traditional cast-in-place walls, and since it is pneumatically placed, greatly reduces ...
Shotcrete is a name that covers both dry and wet mix, so shotcrete is the better name for a topic containing both wet and dry mix sprayed concrete. Oyvind 10:26, August 30, 2005 (UTC) Reply- Gunite is the term for only the dry process and has been widely used in North America since the first development of the process around 1900.
Shotcrete; Ribs or mining arches and lagging; Cable bolts; In-situ concrete; Typically a rock support system would include a number of these support methods, each intended to undertake a specific role in the rock support such as the combination of rock bolting and shotcrete.
The excavation is protected by a layer of sprayed concrete, commonly referred to as shotcrete. Other support measures can include steel arches, rock bolts, and mesh. Technological developments in sprayed concrete technology have resulted in steel and polypropylene fibers being added to the concrete mix to improve lining strength.
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