Question

The porosity of a certain soil sample was found to be 80% and its specific gravity was 2.7; the critical hydraulic gradient will be estimated as

• A. 0.34
• B. 0.92
• C. 1.0
• D. 1.5

Answer 1

The correct option is A 0.34

(a)
$i_c=\frac{G-1}{1+e}$

$n=\frac{e}{1+e}$

$i_c=\frac{2.7-1}{1+4}=0.34$