Shotcrete technology is the use of concrete shotcrete machine, the use of compressed air generated huge pressure to quickly spray the nozzle with accelerator concrete to the working surface, quickly condense to form a concrete supporting layer, fill the cracks and gaps in the working surface, so that it bonded to form a whole and play a role in strengthening the building technology.
Shotcrete from the construction process can be divided into dry spray, wet spray and tidal spray three, the use of equipment are dry concrete shotcrete machine (referred to as dry spray machine), wet concrete shotcrete machine (referred to as wet spray machine) and tidal concrete shotcrete machine.
The dry concrete shotcrete machine adopts the dry shotcrete technology, which has the advantages of simple operation, high distance transportation and good flatness of the spray surface. However, its disadvantages are also obvious, due to the mixing of material and water outside the nozzle in the spray process, resulting in a large amount of concrete rebound, affecting the quality of concrete, and the construction site is very dusty and the environment is harsh.
In contrast, the wet concrete shotcrete machine uses the wet spraying process to solve these problems. By mixing shotcrete in advance, the wet spraying process reduces the amount of rebound and on-site dust, and improves the construction environment. Because the concrete is prefabricated in the mixing station, the material can be mixed evenly with water, and the water-cement ratio is easy to control. It can adapt to large-scale construction of large machinery and improve production efficiency.
At present, Shotcrete technology is the use of concrete shotcrete machine, the use of compressed air generated huge pressure to quickly spray the nozzle with accelerator concrete to the working surface, quickly condense to form a concrete supporting layer, fill the cracks and gaps in the working surface, so that it bonded to form a whole and play a role in strengthening the building technology. process is gradually replacing dry spraying process, which is widely used in tunnel engineering, improving the construction efficiency of shotcrete and the durability of supporting concrete, and ensuring the project quality.
Wet concrete shotcrete machine is the core equipment in shotcrete construction, mainly includes small wet shotcrete machine, wet concrete shotcrete unit, large concrete shotcrete manipulator and so on. Wet concrete shotcrete machine has the advantages of high mechanization degree, simple process and high production efficiency, and is widely used in construction, municipal, railway, highway, tunnel, mine, foundation pit, slope and other projects.
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