Plastic Index

Written by Jerry Ratzlaff on . Posted in Geotechnical Engineering

Plastic index, abbreviated as PL, is the water content at which the soil changes from semi-solid state to solid state.


plastic Index formula

\(\large{ PL =  LL - PL   }\)   


\(\large{ PL }\) = plastic limit

\(\large{ LI } \) = liquid index

\(\large{ LL } \) = liquid limit


Tags: Equations for Liquid Equations for Soil