Multiple choice

As per the Indian Standard Soil Classification System, a sample of silty clay with liquid limit of 40% and plasticity index of 28% is classified as

  1. CH

  2. CI

  3. CL

  4. CL-ML

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using the Casagrande plasticity chart, a soil with a liquid limit of 40% (intermediate, between 35% and 50%) and a plasticity index of 28% (which plots above the A-line) is classified as CI (clay of intermediate plasticity).