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The dry-spraying method is to dry the aggregate, cement and quick-setting agent dry and evenly in a certain proportion, and then put it into the concrete shotcreting machine. The compressed air is used to send the dry aggregate to the spray gun in a suspended state in the hose and then in the nozzle. It is mixed with high-pressure water and sprayed onto the rock surface at a relatively high speed. This process is apt to produce large dust, and the springback is large. Water is controlled by the valve at the nozzle, and the control of the water-cement ratio is difficult.
The tidal spray method is to pre-add a small amount of water to the aggregate to make it moist, and then add cement to mix, thereby reducing the dust when loading, mixing and spraying. However, a large amount of water is still added and ejected at the nozzle, and the spray process and the dry spray process are similar.
The wet spray method is to uniformly mix the aggregate, cement and water according to the design ratio, and send it to the spray head with a wet spray gun, and then spray it after adding a quick-setting agent on the spray head. The quality of wet shotcrete is easy to control, and the amount of dust and springback during the spraying process is very small. This method should be developed vigorously to apply the jetting process.
What is the difference between wet spray, dry spray and tide spray?
What is the difference between wet spray, dry spray and tide spray? Henan Hao Li sprayer manufacturers introduce the differences between wet spray, dry spray, and wet spray. Hopefully, they will be able to help with the purchase of spray guns.