USCS Classification of a High-LL Silt
MediumUSCSA-line
An inorganic fine-grained soil has LL = 60 and PI = 15. Its USCS classification is:
- AMH
- BCL
- CCH
- DML
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Answer: A. MH
LL = 60 ≥ 50, so the soil has high plasticity. The A-line is 0.73(60 − 20) = 29.2. PI = 15 plots below it, so the soil is a high-plasticity silt, MH. CH would require PI above the A-line.
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