Question

As per indian standard soil classsification system,a sample of clay with liquid limit of 40% and plasticity of 28% is classified as

Answer 1

Solution: it is cl

Ip of soil =28%

Ip of A-time =0.73 (WL-20)

= 0.73(40-28)=8.76

∴ Ip = of soil > Ip of A-Line

∴It will lie above A-Line and also 35<wL<50

so it is CI.