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The mineral oil if present in mixing for concrete __________

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The mineral oil if present in mixing for concrete __________

(a) Improves strength

(b) Reduces strength

(c) Gives more slump

(d) Gives a smooth surface

The question was asked by my school principal while I was bunking the class.

This question is from Quality of Water topic in chapter Water of Concrete Technology

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The correct option is (a) Improves strength

Explanation: The mineral oil if present in mixing for concrete increases strength for the concentration up to 2%.

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