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Liquid limit vs Moisture content corresponding to Maximum Degree of Saturation

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Dankazm

Geotechnical
Mar 23, 2020
1
Dear Experts,

Could you please explain the difference between the "liquid limit" and "moisture content corresponding to maximum degree of saturation"?

For Kaolin clay, would there be any major difference in the value of both moisture contents mentioned above?

Appreciate if you could please explain the difference between them both theoretically and practically.

Kind regards,
Dankazm.
 
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The water content at full saturation will depend on the void ratio.
The liquid limit will not.
For a clay with a liquid limit of 100 (always), water content at full saturation will vary with volume of
sample or void ratio (i.e. can be fully saturated at moisture contents that are 75% and 50%, if void ratios are
~2.0 and 1.2, respectively.
 
Here is an explanation of relation ship between water content and liquid limit.

If a soil is gradually dried from a slurry, it passes from state of viscous liquid to a plastic state; then to a semi-solid, and finally into a solid state. The moisture contents at which the soil passes from one state to the next are known as consistency limits (also called “Atterberg Limits”)

And,

Liquid Limit is the minimum amount of water required to be added to a soil, expressed as a percentage of the dry weight of the soil, that will just make it to flow like a liquid when jarred slightly. At the Liquid Limit, soils have very small shear strength which may be overcome by the application of a little force, and cohesion is practically zero. The liquid limit serves mainly to distinguish soils with respect to the amount of moisture necessary to make them to slide.

The chart below may also help,

Atterberg_Limit_Chart_j3ftww.png
 
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