Question

The secondary consolidation is represented by __________

(a) \(∆e = -α *⁡\frac{t_1}{t_2}\)

(b) \(∆e = -α log_{10}⁡\frac{t_2}{t_1}\)

(c) \(∆e = -log_{10}⁡\frac{t_1}{t_2}\)

(d) ∆e = α log10⁡t1

I have been asked this question in my homework.

I would like to ask this question from Secondary Consolidation and Three Dimensional Consolidation in section One Dimensional Consolidation of Geotechnical Engineering I

Answer 1

Right option is (b) \(∆e = -α log_{10}⁡\frac{t_2}{t_1}\)

For explanation: The secondary consolidation is represented by the equation of,

\(∆e = -α log_{10}⁡\frac{t_2}{t_1}\)

Where α = coefficient representing the rate of secondary compression

t1 and t2 = total elapsed time since load was applied to the soil.