AL Concrete Practice Questions - Alabama Concrete Contractor Examination Exam

Why is a mud mat (lean concrete leveling course) sometimes placed on the bottom of a footing excavation?

To replace all structural reinforcement To provide a clean, level working surface and protect the subgrade To eliminate the need for dewatering permanently To increase the design footing thickness without engineer approval

Correct Answer:

To provide a clean, level working surface and protect the subgrade

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