Referring to occurrences observed in a typical field or laboratory compression test, explain why a soil mass does not expand to its original volume when loading is released.

Find out the reason for the difference in behavior between clay and silt?

Write down the important strength and deformation properties of a soil.

Q# 2. The following are the results of a consolidation test on a sample of a clayey soil Pressure, o' (kN/m²) 1.116 25 1.108 50 1.055 100 0.962 200 0.845 400 0.755 800 0.65 1600 0.658 800 0.675 400 0.685 200 a Plot the e, log o' curve. b. Using Casagrande's method, determine the pretonsolidation pressure. Calculate the compression index, C, and the ratio of C/C. C. (Note: Use excel for calculation and drawing. Discuss the details in your own words.)

Describe the strength values for consistency of clay such as hard, very stiff and medium.