Question

Consider the following statements:
On addition of lime to a clay soil, generally
1. MDD and strength both increase
2. MDD decreases but strength increases
3. MDD and OMC both increase
Which of these statements is correct?

• A. 1 only
• B. 2 only
• C. 3 only
• D. None of these

Answer 1

The correct option is B 2 only

• Lime decreases the plasticity index of highly plastic soils and make them friable and more easily handled in the field.
• It increases the optimum moisture content and decreases the maximum compacted density however there will be an increase in strength.
• About 5 - 10% lime is required for cohesive soils.