always less than 1

always equal to 1

equal to or less than 1

equal to or gi eater than 1

0 < PI < 7

7<PI< 17

17<PI<27

PI>27

liquid state

plastic state

semi-solid state

solid state

negative

zero

non-plastic (NP)

1

plasticity index to consistency index

plasticity index to flow index

liquidity index to flow index

consistency index to liquidity index