Consider Soil No. 3 of Problem 4.9. Using the % of clay size fraction and the liquid

Question:

Consider Soil No. 3 of Problem 4.9. Using the % of clay size fraction and the liquid limit of the soil, estimate:
a. Plastic limit (use Eq. 4.10)

b. Plasticity index (use Eq. 4.11)

c. Activity (use Eq. 4.19)

Data From Problem 4.9

Liquidity index, LI, defined by Eq. (4.15), can indicate probable engineering behavior depending on the natural or current state of moisture content. For example, the material behavior can vary from a brittle solid (L I > 1) to viscous fluid (L I > 1) with an intermediate plastic state (0 < LI > 1). From the plasticity characteristics and ranges of moisture contents listed in the following table,