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Question

The plasticity index and the percentage of grain size finer than 2 microns of a clay sample are 25 and 15, respectively. Its activity ratio is

A
2.5
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B
1.67
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C
1.0
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D
0.6
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Solution

The correct option is B 1.67
(b)
Activity =PlasticityIndexPercentofclayparticlesfinerthan2μm

=2515=1.67

As activity is more than 1.25 so it is active soil.


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