1. The difference between the dry and wet degree of the material:
The spray slurry added by the Dry Shotcrete Machine is dry, such as concrete, cement, etc., without adding water or adding a small amount of water. Wet Shotcrete Machine adds a well-stirred mixture, such as concrete, cement and water, which are fully mixed and then sprayed out.
2. Differences in working mode:
Because the dry concrete or cement is added to the Dry Shotcrete Machine, when spraying, the nozzle needs to add water to ensure the spraying effect and not generate too much dust. The Wet Shotcrete Machine uses water to fully mix concrete or cement, and then spray it, and there is no need to add water at the nozzle, and no dust is generated, which ensures the working environment.
3. The difference between conveying distance and wind pressure:
The maximum conveying distance of the Dry Shotcrete Machine can reach more than 200 meters, while the slurry sprayed by the Wet Shotcrete Machine is already stirred and viscous, so the vertical conveying distance can only reach 20-30 meters, and the horizontal conveying distance is 30-50 meters. The air pressure of the Dry Shotcrete Machine can reach 7 cubic meters, and the wind pressure of the Wet Shotcrete Machine needs 13 cubic meters to work.
4. Operation and safety differences:
The dry spray machine needs to occupy a lot of operators. Due to the large amount of dust generated, it not only affects the environment, but also causes great harm to safety production and workers, and is not conducive to underground construction operations. Because the slurry has been mixed before, the Wet Shotcrete Machine is not allowed to take up a lot of manpower, and it will not generate dust, so the impact on workers and the environment is not large, if it is used in various working environments.
5. The difference between resilience and cohesion:
The rebound rate of dry blasting machine reaches 15-50%, and it will also cause poor cohesion, especially in underground construction, which will be deformed by changes in the crust, causing splitting and damage. The rebound rate of the wet spray machine can only reach 10% at most, and because the slurry is previously stirred according to the water-cement ratio, the cohesion is very high, and it is not easy to deform with the change of the crust, which plays an important role in safe production.
