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Question

The water content of a saturated soil and specific gravity of soil solids were found to be 30% and 2.70 respectively. Assuming the unit wt of water to be 10 kN/m3, the saturated unit wt (kN/m3) and the void ratio of the soil are

A
19.4, 0.81
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B
18.5, 0.30
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C
19.4, 0.45
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D
18.5, 0.45
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Solution

The correct option is A 19.4, 0.81
Soil is saturated, so S = 1

Water content, w = 30 %

Specific gravity,Gs=2.7

Unit weight of water, γw=10 kN/m3

We know, Se=wGs

e=0.3×2.71=0.81

γsat=(2.7+0.811+0.81)×10

=19.39 kN/m3

=19.4 kN/m3

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