Question

For a given soil mass, the void ratio is 0.60, water content is 18% and specific gravity of the soil particles is 2.6. The degree of saturation of the ...

Answer 1

Answer:

Soil has voids which can be filled both with air and water. In case of saturated soil, the void are all filled with water.

Void ratio is represented by e while saturation is represented by S and specific gravity by G. The answer to the above question is (b) 30 %.

Answer 2

Answer:

The degree of saturation of the soil particles is 78%.

Explanation:

Given the void ratio of a soil mass, $e= 0.60$

Water content, $w= 18\%$

Specific gravity of the soil particles, $G= 2.6$  

The water and air content in between the soil particles are called voids.

Void ratio, $e$ is given by the ratio of volume of voids to the volume of soil particles.

Degree of saturation, S is given by the ratio of volume of water to the volume of voids.

Water content, w is the ratio of the weight of water to the weight of soil particles.

Specific gravity, G of the soil particles is given by the ratio of the unit weight of solids to the unit weight of water.

The relation between the specific gravity of soil particles $G$, water content $w$, degree of saturation $S$, and void ratio $e$, is given by $Gw=Se$

Substituting  the given values,

$2.6\times \frac{18}{100} =S\times 0.60$

$\implies S=\dfrac{2.6\times 0.18}{0.60}$

$=2.6\times 0.3=0.78=78\%$

Therefore, the degree of saturation of the soil particles is 78%.