alleryStart learning →Per §10.3, the maximum nominal aggregate size RECOMMENDED for high-strength concrete is:
A63 mm
B20 mm
C40 mm
D10 mm
Answer & Solution
Correct answer: D. 10 mm
1. §10.3: 'for high strength concrete 10 mm maximum nominal size aggregate is recommended. 20 mm maximum nominal size aggregate is preferable against about 40 mm in case of medium strength concrete.'
2. Larger aggregate sizes hurt interface bond and bring stress concentrations in rich mixes.
_Source: IGNOU ET-522 Block-3 Unit-10 Concrete Mix Design, §10.3, p. 7_
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