Activity of Soil :- ($A_t$)

(Scientist:-Skemptom)

Activity of soil os the ratio of plasticity index and percentage of clay friction (minus 2 cu size)

$A_t=\frac{I_p}{f}$

where,

$I_p=$Plastic index

$f=$clay friction

$A_t=\frac{W_l-W_p}{C%}$

where, $C%=$% of soil passing 2 cu size =% of soil finear than 2 mu $\lt 2u \rightarrow clay$ …