Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

Discussion Forum : Soil Mechanics and Foundation Engineering - Section 3 (Q.No. 35)
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.

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)

Yogesh said:   9 years ago
Coeff of vol change = coeff of compressibility/(1+eo).

Maybe the question is jumbled, if we take Coeff of vol change as 3 x 10-2 & coeff of compressibility as 6.75 x 10-2 the answer 1.25 is correct.

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)

Biki said:   7 years ago
Coefficient of volume compressibility (coefficient of volume change) = coefficient of compressibility /1+e.

Reverse the given values to get the correct answer.

Jcr said:   9 years ago
Coeff. compressibility = coeff.volume change * (1 + e).

Coeff. compressibility> Coeff.volume change always => So I think the question is incorrect.

Ram pravesh said:   6 years ago
Mv=av/(1+e).

The coefficent of value change is inversely proposition coeff of compressibility.
(1)

MJM said:   4 years ago
It should be 1.25 as compressibility coeff/volumetric change = 1+e.

Prasenjit said:   8 years ago
Cc!=cv/1+e0,
Cc =6.75*10 power -2,
Cv=3*10 power -2,
Ans 1.25.

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.


Post your comments here:

Your comments will be displayed after verification.