Liquidity index

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The index that relates the plasticity of a soil to its natural moisture content.

Liquidity index = (natural moisture content - plastic limit) / plasticity index

Note: The complement to unity of the liquidity index is called in French indice de consistance, and in German Konsistenzzahl.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM