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Water proof cement is prepared by mixing ordinary cement with:

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in Basic Civil Engineering by (111k points)
Water proof cement is prepared by mixing ordinary cement with:

(a) Resins

(b) Water repellent chemicals

(c) Sulpho-aminate

(d) Metal stearates

I got this question in an internship interview.

This question is from Types of Cement and Uses topic in chapter Materials for Construction of Basic Civil Engineering

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Correct choice is (d) Metal stearates

Best explanation: Resins are added in air entraining cement.  Water repellent chemicals in hydrophobic cement.  Sulpho-aminate is added in expanding cement.  Metal stearates (Ca, Al, etc) are added in small percentage during grinding to get water proof cement.

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