Civil Engineering MCQAE Level Civil Engineering

The liquidity index compares natural water content with

Foundation EngineeringGeneralMEDIUM

Choose the correct answer

A

specific gravity only

B

plastic limit and plasticity index

C

cohesion only

D

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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