Consider the following statements: Lime stabilization of soil leads to 1. Decrease in shrinkage limit 2. Increase in plastic limit 3. Decrease in liquid limit 4. Flocculation of clay particles Which of the above statements are correct?

Option 4 : 2, 3 and 4

Concept:

Lime stabilization of Soil:

• It is process of stabilizing soils by adding lime to reactive soils to generate long-term strength gain through a pozzolanic reaction. It is used to improve the strength, stiffness and durability of fine-grained clayey soils.
• Addition of lime to soils produces a maximum density under a higher optimum moisture content than in the untreated soil, thus leads to flocculated or aggregated larger particle groups which are fairly stable.
• Increase in lime content causes considerable reduction in swelling pressure and thus increase in shrinkage limit and plastic limit. Subsequently it decreases liquid limit.
• Adding of lime to soils increases soil resilient modulus shear strength substantially.

Hence, only statement 1 is incorrect, rest of the statements are correct.