Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion


The compression index of a soil

[A]. decreases with an increase in the liquid limit
[B]. increases with an increase in the liquid limit
[C]. decreases with an increase in the plastic limit
[D]. is not related with plastic limit.

Answer: Option B


No answer description available for this question.

Pratima Yadav said: (May 21, 2013)  
Compression index describes variation of void ratio as a function of the change of effective stress plotted in the logarithmic scale.

It therefore represents deformative characteristics of overconsolidated soil.

Typical range of compression index is 0.1 to 10.

Hatem said: (Feb 20, 2014)  
Cc = 0.009(LL-10) for undisturbed clays.

Cc = 0.007(LL-10) for remolded Clays.

There are many other correlations for Compression Index which involve the in-situ void ratio, and in situ water content.

Chaudhary said: (May 28, 2017)  

Anne said: (Sep 5, 2017)  
What's the difference of 0.007(LL-7) and 0,007(LL-10)?

Abhishek said: (Sep 29, 2018)  

The correct relation is Cc = 0.007(WL-10).

Anonymous said: (Mar 3, 2019)  

The correct relation is Cc = 0.007(WL-7) for remoulded clay.

Pleo said: (Mar 21, 2019)  
Yes, correct @Abhisek.

The relation is: Cc = 0.007(LL-7).

Lokesh said: (Sep 6, 2021)  
Cc= 0.009(LL-10) ; for undisturbed soil of medium sensitivity.
Cc= 0.007 (LL-7) ; for remoulded soil of low sensitivity.
Cc= 0.4(e-0.25); for undisturbed soil of medium sensitivity, where e= initial void ratio.

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