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As per I.S. 456 – 1978, the pH value of water shall be?

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in Civil Engineering Drawing by (128k points)
As per I.S. 456 – 1978, the pH value of water shall be?

(a) Less than 6

(b) Not less than 6

(c) Equal to 6

(d) Equal to 7

I got this question in semester exam.

My question comes from House Design and General Arrangement in division Village Housing of Civil Engineering Drawing

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Correct choice is (b) Not less than 6

The best I can explain: Water used for mixing and curing shall be clean and free from injurious amounts of oils, acids, alkalis, salts, sugar, organic materials or other substances that may be deleterious to concrete or steel.

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