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

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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