Plot the following void ratio versus pressure data, and evaluate the compression index and the recompression index. Determine the pre-consolidation stress.
Void Ratio____________ Pressure (kPa)
1.025 ...................................... 0
1.006 .................................... 10
0.997 .................................... 20
0.978..................................... 40
0.950..................................... 80
0.911.................................... 160
0.893.................................... 200
0.837.................................... 300
0.780.................................... 400
0.655.................................... 800
0.504 .................................. 2000
0.542.................................... 500
0.589.................................... 160
0.681 ..................................... 20

1.100 1.000 0.900 0.800 0.700 0.600 0.500 0.400 0.300 10 100 1000 10000 Effective Stress (kPa) VOia RatiIO