AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

In dry-mix shotcrete compared with wet-mix, which statement is correct?

Dry-mix never produces rebound Wet-mix cannot be used underground Dry-mix adds most of the water at the nozzle, and both processes produce rebound that must be removed and not buried in the work Rebound should be shoveled back into the lining to save material

Correct Answer:

Dry-mix adds most of the water at the nozzle, and both processes produce rebound that must be removed and not buried in the work

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