The liquidity index compares natural water content with
Choose the correct answer
specific gravity only
plastic limit and plasticity index
cohesion only
permeability only
Correct Answer
B. plastic limit and plasticity index
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Liquidity Index LI = (w − PL) / PI, where w is natural water content, PL is plastic limit, PI is plasticity index. LI = 0 → soil at plastic limit; LI = 1 → soil at liquid limit; LI > 1 → soil is in liquid state. LI is used to assess the consistency and sensitivity of saturated fine-grained soils.
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