Question

Consider the following statements:
Apparent cohesion in sands is exhibited mainly due to
1. reduction in density.
2. increase in density.
3. capillary moisture in pores.
Which of these statements is/are correct?

• A. $1,2$ and $3$
• B. $1$ and $3$ only
• C. $2$ and $3$ only
• D. $2$ only

Answer 1

The correct option is B $1$ and $3$ only

Bulking in sands is manifestation of capillary moisture. The capillary menisci surrounding the soil grains produces apparent cohesion which holds the particle together in clusters. The increase in volume known as bulking occurs only in moist sands, thereby decreasing the density of sand