The following are the results of a laboratory consolidation test: effective vertical stress (ton/ft? ) 0.25 0.5 1.0 2.0 4.0 void ratio 1.03 1.02 0.98 0.91 0.79 0.71 0.62 0.635 0.655 0.67 8.0 16.0 8.0 4.0 2.0 a. plot the results as void ratio vs. effective vertical stress (log scale). you may use excel (or some other plotting software) to plot the data points, but you must print out and sketch the consolidation curve by hand on the plot. b. determine the compression and recompression indices. determine the maximum past vertical effective stress using casagrande's construction method.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj