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How does the strength of concrete differ with age of concrete?

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How does the strength of concrete differ with age of concrete?

(a) Increases

(b) Decreases

(c) No effect

(d) Increases, then decreases

This question was posed to me during an online interview.

Query is from Properties of Concrete topic in section Building Construction of Basic Civil Engineering

1 Answer

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The correct answer is (a) Increases

Explanation: It increases with increase in age.  The strength measured after days, months and years shows an increase. It takes 28 days for concrete to attain full strength.  However, it continues to attain strength even after 28 days.

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