alleryStart learning →Per §3.4, sea water is most strictly to be AVOIDED for use as mixing water in:
APlain concrete fully submerged at sea
BPlain concrete on coastal foundations
CPlaster work and pre-stressed concrete
DMass concrete dam cores away from sea
Answer & Solution
Correct answer: C. Plaster work and pre-stressed concrete
1. §3.4: 'the use of sea water must be avoided under any circumstances in prestress concrete work because of stress corrosion and undue loss of cross-section of small diameter wires.'
2. The summary §3.5 adds that sea water 'should never be used in case of plastering or in case of prestressed concrete.'
_Source: IGNOU ET-522 Block-1 Unit-3 Water, §3.4 and §3.5, pp. 43-44_
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