(a) Define compression index. How can it be determined from a consoli…
Previous year question for Geotechnical Engineering.
Question
(a) Define compression index. How can it be determined from a consolidation test ? Distinguish between normally consolidated soil, under-consolidated soil and an over-consolidated soil. 10
(b) In a consolidation test the pressure on a sample was increased from 150 to $300\ \text{kN}/\text{m}^2$. The void ratio after 100% consolidation under $150\ \text{kN}/\text{m}^2$ was 0.945, and that under $300\ \text{kN}/\text{m}^2$ was 0.812. The coefficient of permeability of the soil was $25 \times 10^{-6}\ \text{mm}/\text{s}$ and the initial height of the sample was 20 mm. Determine (i) the coefficient of compressibility, (ii) the coefficient of volume compressibility. 10
- Year: 2018
- Subject: Geotechnical Engineering