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The larger the thickness of CNS introduced over the expansive soil, the more will be the resulting swelling in soil.

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in Irrigation Engineering by (75.2k points)
The larger the thickness of CNS introduced over the expansive soil, the more will be the resulting swelling in soil.

(a) True

(b) False

This question was posed to me in an online interview.

I want to ask this question from Lining of Canals in Expansive Soils in chapter Lining of Irrigation Canals and its Economics of Irrigation Engineering

1 Answer

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by (106k points)
Correct choice is (b) False

The best explanation: A layer of some cohesive non-swelling soil (CNS) is added over the expansive soil surface to counteract the swelling pressure. The larger the thickness of CNS, the lesser would be the resulting swelling and deformations.

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