(c) Further divide each into four equal parts, but keep each set of fourįigure 1: Rolling into ball and four equal part of soil after divide. (b) When slight cracks begin to appear on the surface, divide the ball (a) When the soil is plastic enough, it is well kneaded and then shaped Table 1: Classification of soil according to liquidity indices. Table 1: Classification of soil according to plasticity.ħ-17 Medium Plastic Silty clay or clayey silt Water content to the plasticity index of a soil.
One such relationship is the liquidity index.Ĭonsistency index is defined as the ratio of the liquid limit minus the natural The plastic and liquid limits can provide an indication of the soil’s consistencyĪnd/or sensitivity potential. Water content through which the soil remains plastic.įor fine grained soils, determining the natural water content (the waterĬontent of a soil in an undisturbed condition in the ground) and relating it to Numerical difference of the liquid and plastic limit, and indicates the range of It is water content at the boundary between the plastic and semi. Just begin to crumble when rolled into a thread of approximately 3 mm inĭiameter. Plastic limit (P w) of soil is defined as the water content at which a soil will The objectives of this experiment are to determine the lowest moistureĬontent at which the soil behaves plastically. Plastic limit, it is considered to behave as a solid, or a non-plastic material. A plastic material can be molded into a shapeĪnd the material will retain that shape. The plastic limit is defined as the moisture content at which soil begins toīehave as a plastic material. Identify the importance and application of plastic limit test. Identify the plastic limit value for soil. At the end of this experiment, students should be able to:
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