alleryStart learning →Per Table 3.2, the recommended pH range of mixing water for concrete is:
A1.0 to 3.5
B12.0 to 14.0
C9.0 to 11.0
D4.5 to 8.5
Answer & Solution
Correct answer: D. 4.5 to 8.5
1. Table 3.2 in §3.3.4 lists pH limits of 4.5 to 8.5 for mixing water.
2. §3.3.3 also gives an acidity rule-of-thumb that pH above 6 is generally safe.
_Source: IGNOU ET-522 Block-1 Unit-3 Water, Table 3.2, §3.3.4, p. 42_
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