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What is internal sulphates attack?(a) Presence of natural gypsum in the aggregates(b) Soil may contain excess of gypsum(c) Sulphate are more usually are a result of ground water(d) Industrial waste waterThe question was posed to me in an internship interview.This is a very interesting question from Mass Concrete and Chemical Action topic in section Durability of Concrete of Concrete Technology

Answer»

The correct choice is (a) Presence of NATURAL gypsum in the aggregates

The explanation is: Internal sulphates attack are rarer but ORIGINATES from such concrete-making MATERIALS LIKE Presence of natural gypsum in the aggregates.



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