alleryStart learning →Under the ASTM classification, the cement Type used 'when high early strength is required (Rapid Hardening Cement)' is:
AType III
BType II
CType I
DType V
Answer & Solution
Correct answer: A. Type III
1. §1.7(B) lists ASTM types I–V: Type I = general construction, Type II = moderate sulphate / moderate heat, Type III = 'high early strength is required (Rapid Hardening Cement)', Type IV = low heat, Type V = sulphate resisting.
2. Hence rapid hardening is Type III.
_Source: IGNOU ET-522 Block-1 Unit-1 Cement, §1.7(B), pp. 10-11_
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