Question

The virgin compression curve with axes adopted as per convention in this regard for a clay soil is shown in the figure. The compression index of the soil is

• A. 0.25
• B. 0.50
• C. 1.00
• D. 1.25

Answer 1

The correct option is B 0.50

Compression index,

$C_c=\frac{\Delta e}{log\left(\frac{{\sigma }_2}{{\sigma }_1}\right)}=\frac{1.0-0.5}{log\left(\frac{10}{1}\right)}=0.50$