Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion


The coefficient of compressibility of soil, is the ratio of

[A]. stress to strain
[B]. strain to stress
[C]. stress to settlement
[D]. rate of loading to that of settlement.

Answer: Option B


No answer description available for this question.

Adithya said: (May 20, 2014)  
Coefficient of compressibility is defined as ratio of change of void ratio to change of effective stress. SO it essentially has units of inverse of pressure, i.e. pa-1

Anand said: (Nov 18, 2016)  
Strain by stress. Please, can anyone explain it?

Priyansu said: (Dec 30, 2016)  
Av (coefficients of compressibility) -----decrease in strain /stress.

Priyansu said: (Dec 30, 2016)  
av-----decrease strain /stress.

Here Av -coefficients of compressibility.

Vishal Babu Jaiswal said: (Jun 20, 2017)  
It is defined as the ratio of volumetric strain to the effective stress.

That means strain to stress.

Vasanth said: (Jul 30, 2017)  
Change in void ratio is volumetric strain and change in stress is denoted as stress.

Ump said: (Sep 29, 2017)  
It is 1/k.

Where k=bulk modulus.

Hemant Bhuyar said: (Dec 4, 2018)  
I am not getting this, please Can anyone explain?

Neru said: (Apr 28, 2019)  
Av = (e2-e1)/(stress2-stress1) but how strain vs stress?

Kevin said: (May 13, 2019)  

Change in voids ratio is considered as strain. The strain is nothing but change in the dimension per unit original dimension.

Kcube said: (Jun 16, 2019)  
Coefficient of compressibility is the negative ratio of decrease in void ratio (i. E volumetric strain) to the increase in effective stress.

Increase in load will result in a decrease in void ratio and an increase in effective stress. The graph between void ratio and effective stress will be a parabolic curve with concavity upwards. The slope of this curve i.e. void ratio (y) /effective stress (x) will be negative. Hence the negative sign which will make the coefficient positive.

Biswajit Swain said: (Aug 26, 2019)  
It is the ratio of change in void ratio to change in stress. As void ratio changes the volume Will also change.

Hence it is the ratio of volumetric strain to stress.

Mona said: (Dec 2, 2019)  
Compressibility is the inverse of bulk modulus of elasticity that's why it is a strain to stress.

Sobhan said: (Dec 11, 2019)  
The ratio of how much strain coming to soil for unit stress is known as compressibility.

Deep said: (Feb 24, 2020)  
Co.eff of Compressibility is the reciprocal of young modulus.

Deepak Pandey said: (Apr 6, 2020)  
Coefficient Of compressibility is the ratio of change in the void to change in effective stress.

Shahzaib said: (May 30, 2020)  
Change in voids ratio is considered as strain. The strain is nothing but change in the dimension per unit original dimension.

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