Question

The virgin compression curve for a soil is shown in figure below. What is the compression index of the soil?

• A. 0.3
• B. 0.5
• C. 1.5
• D. 15

Answer 1

The correct option is A 0.3

Compression index is given by the equation,

$C_c=\frac{e_1-e_2}{lo{g}_{10}\left({\overline{\sigma }}_2/{\overline{\sigma }}_1\right)}$

$=\frac{1.3-1.0}{lo{g}_{10}\left(100/10\right)}=0.3$