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

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SCDOT 2007 Section 301 cement-modified subgrade work includes pulverizing in-place soil, adding Portland cement, mixing, wetting, and compacting. What is the primary purpose of the cement?

To chemically modify and strengthen the existing soil so it can serve as a more stable subbase To replace the need for any subsequent base or pavement To convert the soil into Portland cement concrete pavement To waterproof the soil so no drainage is needed

Correct Answer:

To chemically modify and strengthen the existing soil so it can serve as a more stable subbase

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