Question

The liquid limit and plastic limit of sample are 65% and 29% respectively. The percentage of the soil fraction with grain size finer than 0.002 mm is 24. The activity ratio of the soil sample is

• A. 0.50
• B. 1.00
• C. 1.50
• D. 2.00

Answer 1

The correct option is C 1.50

(c)

$Activity=\frac{PlasticityIndex}{\%ofclayfraction}$

$=\frac{65-29}{24}=\frac{36}{24}$

$=1.5>1.25$
$\therefore$ The soil is active.