Plastic Index
Plastic index, abbreviated as PI, also called plasticity index, a dimensionless number, is the water content at which the soil changes from semi-solid state to solid state.
plastic Index formula |
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\(\large{ PI = LL - PL }\) | ||
Symbol | English | Metric |
\(\large{ PI }\) = plastic index | \(\large{dimensionless}\) | |
\(\large{ LL } \) = liquid limit | \(\large{dimensionless}\) | |
\(\large{ PL } \) = plastic limit | \(\large{dimensionless}\) |