Shrinkage limit and Semi-Solid State of Soil

chapter 33 - Shrinkage limit and Semi-Solid State of Soil
From liquid state to semi-solid state, soil remains fully saturated and with the reduction in water content volume of the soil mass reduces almost in equal amounts till a stage is reached when further reduction of the water content does not cause any reduction in the volume of the soil.

At that point soil mass changes from semi solid state to solid state. Soil converts into a soil mass which has developed pores into it and that are partially filled with water. Now if we dry the soil to reduce its water content, soil's volume remains the same but its pore water gets reduced. Hence no volume changes with water content reduction. That the soil does not shrink any more.
When water content of a soil is reduced and at particular water content soil stops shrinking, that water content is called shrinkage limit of that soil.
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