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Which one of the below cannot to be used as a substitute of sand?

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in Basic Civil Engineering by (111k points)
Which one of the below cannot to be used as a substitute of sand?

(a) Surkhi

(b) Quarry dust

(c) Glass

(d) M-sand

The question was asked in homework.

Origin of the question is Properties of Sand in chapter Materials for Construction of Basic Civil Engineering

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Correct answer is (b) Quarry dust

For explanation: Surkhi is pieces of burned clay, M-sand is manufactured sand, glass can be powdered and these form excellent substitutes for sand.  Quarry dust has flaky grains and is not recommended to use in concrete or masonry works, though it can be used for low strength works.

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