Table 2: Plasticity values for various soil types.
Category |
Soil |
Plasticity Index (PI) percentage |
Degree of plasticity |
I |
Sand or silt |
0-1 |
Non plastic |
Traces of clay |
1-5 |
Slight plasticity |
|
Little clay |
5-10 |
Low plasticity |
|
II |
Clay loam |
10-20 |
Medium plasticity |
III |
Silty clay |
20-35 |
High plasticity |
clay |
> 35 |
Very high plasticity |