Cohesion value of sand is typically low. Sand particles are usually not cohesive and do not stick together. Cohesion is the shear resistance between particles forming soil which is attributed to the surface tension of water at particle contacts and the interlocking of particles.

The cohesion value of sand can vary depending on the type of sand, its gradation, density, and moisture content. Generally, fine sand has higher cohesion than coarse sand. Well-graded sand (with a mixture of different particle sizes) has higher cohesion than poorly graded sand. Dense sand has higher cohesion than loose sand. And moist sand has higher cohesion than dry sand.

Typical values for the cohesion of sand range from 0 to 10 kPa (0 to 145 psi). For most practical purposes, the cohesion value of sand can be assumed to be zero, as it usually has a negligible influence on the behavior of sand in engineering applications.

It's important to note that the cohesion value of soil is not a constant and can vary due to changes in soil conditions, such as changes in moisture content and density.