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The difference between wet-mix shotcrete machine and dry-mix shotcrete machine

Views: 24     Author: Site Editor     Publish Time: 2018-07-13      Origin: Site

The difference between wet-mix shotcrete machine and dry-mix shotcrete machine

1、Difference in Spraying modes

  In dry-mix applications, all dry materials – including cement, aggregate, and ad-mixture – are mixed together, conveyed pneumatically through a hose and then, at the nozzle via a water ring, water is injected evenly throughout the mix as it is being projected. Dry-mix shotcreting may produce more dust which isn’t good for workers’ health.  

In a wet-mix application, all materials – including cement, aggregate, ad-mixture and water – are mixed together before being pumped through a hose and pneumatically projected. Typically, a wet shotcrete machine can complete all procedures. Wet-mix shotcreting doesn’t produce any dust. It is environment friendly and cost-effective.

2、Difference in safety requirements to operators

Due to large dust exposure, dry shotcret machine isn’t suitable for underground construction. More operators is needed for dry shotcreting.

The material of the wet shotcreting is mixed well in advance, it does not need a lot of manpower and does not generate dust, and is less harmful to the environment and workers, and can be used in various working environments.

3、Difference in Rebound rate and cohesiveness

The rebound rate of the dry shotcrete machine is relatively large, and the cohesiveness is slightly worse. In particular, changes in earth’s crust may cause splitting and destruction in underground shotcreting.

The rebound rate of the wet shotcrete machine (trailer mounted concrete spraying machine) is relatively small. The viscosity of the material is relatively high, deformation of the earth's crust has little effect on wet shotcreting.

4、Difference in conveying distance

Maximum conveying distance of dry-mix shotcrete machine is more than 200 m.

Material of wet shotcrete machine is premixed, conveying distance is less than that of gunite machine.

5、Difference in prices 

The price of Gunite machine is lower than that of wet shotcrete machine.

Weibang makes a simple introduction about the differences between gunite machine and wet shotcrete machine. It you have more questions, feel free to make a phone call at +86-155 1589 8077, and our technical stall will give you a detailed introduction.

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