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

Why is air-entrained concrete specified for exterior concrete pavement in climates with freezing and deicing salts?

To eliminate the need for joints To provide microscopic air voids that relieve pressure from freezing water and improve freeze-thaw durability To increase the water-cement ratio To make the concrete black

Correct Answer:

To provide microscopic air voids that relieve pressure from freezing water and improve freeze-thaw durability

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