What is the formula that relates the modulus of rupture (fcr) to the characteristic compressive strength of concrete (fck)?

Design of Concrete Structures MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Design of Concrete Structurescivil-engineering-mcqs › design-of-concrete-structures
Published
12 Jan 2019
Last updated
28 May 2026

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Explanation

The modulus of rupture (fcr) is related to the characteristic compressive strength of concrete (fck) by the equation fcr = 0.7 × √fck, where both fcr and fck are measured in N/mm².

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