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CNS material shall be non-swelling with a minimum of ___________

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in Irrigation Engineering by (75.2k points)
CNS material shall be non-swelling with a minimum of ___________

(a) 10 KN/m^2 of cohesion

(b) 15 KN/m^2 of cohesion

(c) 20 KN/m^2 of cohesion

(d) 30 KN/m^2 of cohesion

This question was posed to me in unit test.

Asked question is from Lining of Canals in Expansive Soils in section Lining of Irrigation Canals and its Economics of Irrigation Engineering

1 Answer

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by (106k points)
Correct option is (a) 10 KN/m^2 of cohesion

The best explanation: Whenever CNS soil layer is used, it is desired to compact it to the maximum dry density of the Standard Proctor Compaction Test at OMC. When tested accordingly the minimum cohesion strength on saturated compacted soil remoulded at OMC should be 10 KN/m^2.

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