AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

What should be done with shotcrete rebound in a tunnel lining?

Trowel it into honeycombed areas as patching mortar Leave it in place to increase lining thickness Remove it so it is not incorporated into the work; rebound is wasted material Mix it with extra water and use it as invert concrete

Correct Answer:

Remove it so it is not incorporated into the work; rebound is wasted material

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