alleryStart learning →Per §8.4.3, concrete typically shows little loss of strength up to approximately what temperature?
AAbout 300 °C
BAbout 150 °C
CAbout 50 °C
DAbout 800 °C
Answer & Solution
Correct answer: A. About 300 °C
1. §8.4.3 reads: 'Concrete does not show appreciable loss of strength upto a temperature of 300°C, but the loss of strength may be 50 per cent or more at about 500°C.'
2. Best fire-resistant aggregates listed are basalts, dolerites, dense limestone, blast furnace slag and broken brick aggregate.
_Source: IGNOU ET-522 Block-2 Unit-8 Durability of Concrete, §8.4.3, p. 73_
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