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Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

Discussion Forum : Soil Mechanics and Foundation Engineering - Section 3 (Q.No. 35)
Soil Mechanics and Foundation Engineering
35.
If the coefficients of volume change and compressibility of a soil sample are respectively 6.75 x 10-2 and 3 x 10-2, the void ratio of the soil sample, is
1.10
1.15
1.20
1.25
1.30
Answer: Option
Explanation:

Coeff.compressibility = Coeff.volume change/(1 + e).

(1 + e) = Coeff.volume change/Coeff.compressibility.

e = (Coeff.volume change/Coeff.compressibility) - 1.

e = ((6.75 x 10-2)/(3 x 10-2)) - 1.

e = 2.25 - 1.

e = 1.25.

Discussion:
17 comments Page 1 of 2.
Arefin said:   7 years ago
The formula should be Coefficient of Volume Change= (Coefficient of compressibility)/(1+e). According to this formula, the result will be 0.55.

Ref: Civil Engineering book by R.S Khurmi.
(2)
Madhusmita Ghadai said:   7 years ago
Coefficient of volume change=coefficient of impressibility/(1+e).

If we will consider the coefficient of volume change 3*10^-2 and coefficient of impressibility 6.75*10^-2 then we will get the answer 1.25.
(2)
Wasif said:   5 years ago
The value of e could never be greater than 1.
(1)
Ram pravesh said:   6 years ago
Mv=av/(1+e).

The coefficent of value change is inversely proposition coeff of compressibility.
(1)
Ankush said:   8 years ago
Here, Mv=Av/(1+e0).
(1)
MJM said:   4 years ago
It should be 1.25 as compressibility coeff/volumetric change = 1+e.
CH SWAMY said:   1 decade ago
coeff. compressibility = coeff.volume change/ (1 + e).
Sanku shaw said:   5 years ago
It should be 0.55 not 1.25. Arefin is correct.
Dipunku said:   5 years ago
Correct @Arefin.
Anki said:   5 years ago
Yes, you are right, thanks @Arefin.
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