By approximately how much does a 1% increase in voids decrease the strength of a concrete mix?

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

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

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Choose the correct answer

Explanation

An increase of 1% in void content typically results in about a 5% reduction in the concrete's strength, making option A the correct choice.

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