The liquidity index of a fine-grained soil is calculated as:
Correct answer: A. (w - PL) / PI
- A. (w - PL) / PI
- B. (LL - w) / PI
- C. (w - LL) / PL
- D. (PI - w) / LL
Explanation
Liquidity index compares the natural water content with the plasticity range, so it is (w - PL) divided by PI. A value near zero indicates a water content near the plastic limit, while a value near one is near the liquid limit.
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About Soil Mechanics and Foundations
Soil mechanics examines index properties, phase relationships, classification, permeability, seepage, compaction, consolidation, shear strength and earth pressure. Foundations apply these principles to bearing capacity, settlement and shallow or deep foundation selection, with clear distinction between compaction, which expels air, and consolidation, which expels water over time.
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