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Salt March

As per the In...

Question

As per the Indian Standard soil classification system, a sample of silty clay with liquid limit of 40% and plasticity index of 28% is classified as

A

CH

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B

CI

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C

CL

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D

CL-ML

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Solution

The correct option is B CI
Liquid limit, $w_{L} = 40$ %
$∵ 35 < w_{L} < 50$

$∴ C l a y s a m p l e i s C I$

For $w_{L} = 40$ %

$I_{p} = 0.73 (w_{L} - 20)$

= 0.73(40 - 20) = 14.6

Since sample is having plasticity index 28% which is greater than

$I_{p} = 14.6 t h e r e f o r e t h e s a m p l e i s C I .$

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