In other words, shotcrete is the method of laying concrete. Shotcrete is a rapidly setting concrete that is used to stabilize, repair and build structures by concreting without using a formwork. This is probably one of the most complex concrete installation methods, which requires the perfect interaction of man, machine and concrete mix.
History of shotcrete
The beginning of shotcrete technology and its development date back to the beginning of the 20th century. American Carl Ethan Akeley, a taxidermist at the Chicago Museum of Natural History, who had designed a device for creating artificial landscapes using sprayed plaster, developed the device from around 1907 into a functional two-chamber conveyor for applying cement-based materials. In 1911, Akeley was granted a patent for this so-called cement gun, which can be considered the “birth” of shotcrete technology. Since then, shotcrete recipes have been continuously developed and improved, especially in recent decades, achieving high-performance construction technology that has dramatically changed underground construction in particular (tunnels, mines).
Shotcrete technology has been further developed and significantly improved in recent decades. In terms of shotcrete volumes, markets and technology have shifted from dry shot to wet shot. However, this does not mean that the older method of dry spraying will be replaced by the more modern method of wet spraying, as both have been developed for different applications and requirements. In recent years, these two methods have stood side by side. As the dry shotcrete equipment is much smaller and easier to handle, dry shotcrete is mainly used for smaller quantities, e.g. in repair and special works such as the construction of swimming pools or so-called country houses and also in concrete repair. However, wet spraying is mainly used in the stabilization of structures or in construction, where a large amount of ready-mixed concrete must be applied in a short time, e.g. to stabilize rocks or soil. Typical high-flow sprayers have a nominal capacity of up to 30 m3 per hour.
Shotcreting can be used for a wide variety of purposes:
To secure soil or a trench
Natural limestone wall stabilization
Stabilizing slopes for stabilization
For the construction of new reinforced concrete structures
For strengthening of existing reinforced concrete structures
For the construction of stiffening walls
For strengthening posts and beams
To strengthen or stabilize building foundations
For repairing, stiffening or strengthening overhead structures
Traveter Grupp OÜ has shotcrete pumps based on different technologies to cope with the repair, construction or securing of even the most complex structures.