A concrete slab is specified as '5000 psi @ 28 days'. What does this specification refer to?
Correct Answer
A) Compressive strength
The psi rating for concrete typically refers to compressive strength measured at 28 days after placement, which is the standard specification for concrete strength.
Why This Is the Correct Answer
The psi rating for concrete typically refers to compressive strength measured at 28 days after placement, which is the standard specification for concrete strength.
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