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Per §7.1, the single most important property used to qualitatively indicate most other properties (durability, permeability, shrinkage) of hardened concrete is:
A{'text': 'Compressive strength of concrete', 'label': 'A'}
B{'text': 'Initial setting time of paste', 'label': 'B'}
C{'text': 'Air content of fresh concrete', 'label': 'C'}
D{'text': 'Specific gravity of mix', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': 'Compressive strength of concrete', 'label': 'A'}
1. §7.1: 'Strength of concrete is the single important property which in general may not quantitatively but certainly speak of qualitatively almost all the properties of hardened concrete like durability, permeability, shrinkage, creep deformation and response to temperature.'
2. Compressive strength is selected because of its easy testability and qualitative correlation with the others.
_Source: IGNOU ET-522 Block-2 Unit-7 Strength of Concrete, §7.1, p. 41_
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