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What is external sulphates attack?(a) Industrial waste water(b) Presence of natural gypsum in the aggregates(c) Hydraulic cements(d) Portland cement might be over-sulphatedThis question was addressed to me in class test.I would like to ask this question from Mass Concrete and Chemical Action topic in division Durability of Concrete of Concrete Technology

Answer»

The correct choice is (a) INDUSTRIAL waste water

The best EXPLANATION: EXTERNAL sources of SULPHATE are very common and are usually are a result of high-sulphate soils and ground waters or can be result into industrial POLLUTION.



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