![]() OR It is the minimum moisture content at which a soil flows upon application of very small shear force. The Liquid Limit, also known as the upper plastic limit, is the water content at which soil changes from the liquid state to a plastic state. The water content at which the soil has such a small shear strength that it flows to close a groove of standard width when jarred in a specified manner. Casagrande as the water contents which exist under the following conditions: These limits have since been more definitely defined by A. Procedure for Determination of Liquid Limit | Procedure for Determination of Plastic Limit Shrinkage limit: The boundary between the semi-solid and solid states. Plastic limit: The boundary between the plastic and semi-solid states Liquid limit: The boundary between the liquid and plastic states ![]() Atterberg defined the boundaries of four states in terms of "limits" as follows: The behavior of the soil, therefore, is related to the amount of water in the system. Increasing the thickness of the water films permits the particles to slide past one another more easily. If the addition of water is continued, the thickness of the water film on a particle increases. When water is added to a dry soil, each particle is covered with a film of adsorbed water. A fine-grained soil can exist in any of several states which state depends on the amount of water in the soil system.
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