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Per §7.6.2, the modulus of elasticity of concrete typically scales approximately as which function of its compressive strength?
A{'text': 'As the SQUARE ROOT of compressive strength', 'label': 'A'}
B{'text': 'Inversely with compressive strength', 'label': 'B'}
C{'text': 'Linearly with compressive strength', 'label': 'C'}
D{'text': 'As the CUBE of compressive strength', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': 'As the SQUARE ROOT of compressive strength', 'label': 'A'}
1. §7.6.2 reads: 'The modulus of elasticity of concrete increases approximately with the square root of its compressive strength.'
2. The same section adds that wet concrete shows higher modulus than dry, and that richer/older concrete gives higher E.
_Source: IGNOU ET-522 Block-2 Unit-7 Strength of Concrete, §7.6.2, p. 57_
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