Question

The coefficient of compressibility av is given by _____________

(a) \(a_v=-\frac{e_0}{∆σ’}\)

(b) \(a_v=-\frac{∆σ’}{∆e}\)

(c) av=-∆e

(d) \(a_v=-\frac{∆e}{∆σ^{‘}}\)

The question was posed to me by my college director while I was bunking the class.

This is a very interesting question from Consolidation Process in division One Dimensional Consolidation of Geotechnical Engineering I

Answer 1

The correct choice is (d) \(a_v=-\frac{∆e}{∆σ^{‘}}\)

The best explanation: The coefficient of compressibility av is defined as the decrease in voids ratio per unit increase of pressure.

∴ \(a_v=-\frac{∆e}{∆σ^{‘}}.\).