Civil Engineering PE

Answer: A - The gradation of a soil is not included in its Atterberg Limits. The term Atterberg Limits refers to a soil’s Plastic Limit (P.L.), Liquid Limit (L.L.), and Plasticity Index (P.I.). The P.L. indicates the point at which just enough moisture is present in the soil for it to be shaped. The L.L. is the minimum moisture content needed in a soil for it to flow if it is slightly disturbed. The P.I. is a calculated value (P.I. = L.L. - P.L.) that indicates the range of moisture content in a soil which may exist in a plastic condition.