NM CID GS-4 Practice Questions - New Mexico CID GS-4 Concrete, Cement, Walkways And Driveways Examination Exam

Proof-rolling a driveway subgrade is performed to:

Measure slump before the truck leaves Detect soft, pumping, or yielding areas so they can be undercut and recompacted before concrete is placed Replace the need for isolation joints Cure the slab by densifying the surface

Correct Answer:

Detect soft, pumping, or yielding areas so they can be undercut and recompacted before concrete is placed

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