The liquidity index, LI, defined by Eq. (4.24), can indicate probable engineering behavior depending on the natural or current state of water content. For example, the material behavior can vary from a brittle soild (LI a. Determine the range of liquidity index for each soil over the range of water content.
b. Comment on the probable engineering behavior of each soil as the water content changes (refer to Figure 4.1).

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Plastic lImlt, PL (6) Liquid lImlt, LL (%) 49 37 61 58 511 132 % Clay fraction (< 2 μ m) Natural water content, w, (%) Soll 59-67 29-36 51-56 61-70 441-600 98-111 51-65 26 24 192 49 28 67 72 1