AL Concrete Practice Questions - Alabama Concrete Contractor Examination Exam

A cold joint forms when:

Concrete is placed in freezing weather only A delay allows the previous lift to stiffen so the new concrete does not fully intermix and bond without special treatment Air temperature exceeds 90°F The slump is measured twice

Correct Answer:

A delay allows the previous lift to stiffen so the new concrete does not fully intermix and bond without special treatment

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