AL Runway Practice Questions - Alabama Runway Contractor Examination Exam

Initial saw-cutting of PCC contraction joints should begin:

After random map cracking has fully developed As soon as the concrete is hard enough to cut without raveling and before uncontrolled cracking starts Only after 28-day strength is confirmed Never; joints are only formed with wood inserts forever

Correct Answer:

As soon as the concrete is hard enough to cut without raveling and before uncontrolled cracking starts

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