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The soil suction is maximum, when angle of contact(α) is _____________

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in Geotechnical Engineering I by (102k points)
The soil suction is maximum, when angle of contact(α) is _____________

(a) α=0

(b) α=90

(c) α=60

(d) α=1

This question was addressed to me in final exam.

The origin of the question is Capillary Tension, Capillary Potential and Soil Suction topic in portion Soil Water Effective and Neutral Stresses of Geotechnical Engineering I

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The correct choice is (a) α=0

Easy explanation: As soil suction depend on capillary height (hC)

Using the formula hc=4Tscos α/γw d

When α=0

hc = 4Ts/γw d, which is maximum.

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