SC Bridges Practice Questions - South Carolina Bridges Contractor Examination Exam

What is the primary reason air-entraining admixtures are used in South Carolina bridge concrete?

To provide a system of microscopic voids that relieve freeze-thaw pressure in the paste To replace the need for wet curing on decks To allow unlimited addition of mix water at the jobsite To increase 28-day compressive strength above the mix-design value

Correct Answer:

To provide a system of microscopic voids that relieve freeze-thaw pressure in the paste

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