SC Concrete Paving Practice Questions - South Carolina Concrete Paving Contractor Examination Exam

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Why is unsuitable material such as muck or highly organic soil removed from a pavement subgrade rather than simply covered with aggregate?

Organic soils stain the concrete surface Weak, compressible soils continue to settle and pump under traffic, cracking the rigid pavement SCDOT forbids any soil with a brown color Muck increases the slump of the paving concrete

Correct Answer:

Weak, compressible soils continue to settle and pump under traffic, cracking the rigid pavement

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