Question

The unit of coefficient of volume change is

(a) m^2/kN

(b) m^3/kN

(c) m^2/N

(d) m^3/N

I got this question in my homework.

I need to ask this question from Calculation of Voids Ratio and Coefficient of Volume Change topic in chapter One Dimensional Consolidation of Geotechnical Engineering I

Answer 1

Right answer is (a) m^2/kN

Easy explanation: The coefficient of volume change can be defined as the change in volume of a soil per unit of initial volume due to a given increase in unit pressure.

\(m_v=-\frac{∆H}{H_o}\frac{1}{∆σ’},\) Hence it has the units in the form of m^2/kN (reciprocal of pressure).