Material used for stabilizing can have maximum LL and PI values.

Material used for stabilizing can have maximum LL and PI values.

• A. 40;10
• B. 35;8
• C. 42;9
• D. 40;12

Answer: (A)

When selecting a material to stabilize soil, you want low plasticity so it doesn’t swell or soften with moisture. The maximum acceptable values for the stabilizing material are a liquid limit of 40 and a plasticity index of 10. The pair that matches both maxima is 40 for the liquid limit and 10 for the plasticity index, so it best represents the upper limits you can tolerate. Other options either exceed a limit (one has a liquid limit above 40, another has a plasticity index above 10) or stay within limits but do not reach the maximum values. This reflects how LL and PI determine how plastic and moisture-sensitive a stabilizing material will be.

When selecting a material to stabilize soil, you want low plasticity so it doesn’t swell or soften with moisture. The maximum acceptable values for the stabilizing material are a liquid limit of 40 and a plasticity index of 10. The pair that matches both maxima is 40 for the liquid limit and 10 for the plasticity index, so it best represents the upper limits you can tolerate. Other options either exceed a limit (one has a liquid limit above 40, another has a plasticity index above 10) or stay within limits but do not reach the maximum values. This reflects how LL and PI determine how plastic and moisture-sensitive a stabilizing material will be.