Fig. 2.
The line graph plots void ratio e vertically from 0.3 to 1.0 in intervals of 0.1 against moisture content w in per cent horizontally from 4 to 20. The legend identifies C o T Standard Proctor with solid lines and cross markers, C o T Modified Proctor with dotted lines and cross markers, C o P Standard Proctor with solid lines and diamond markers, and C o P Modified Proctor with dotted lines and diamond markers. C o T Standard Proctor decreases from about 0.58 at roughly 9.7 per cent moisture content to a minimum near 0.49 at about 12.8 per cent, then increases to about 0.58 near 16.8 per cent. C o T Modified Proctor decreases from about 0.51 near 4.6 per cent to about 0.42 near 10.4 per cent, then increases to about 0.51 near 14.2 per cent. C o P Standard Proctor decreases from about 0.86 near 8 per cent to about 0.62 near 14.4 per cent, then increases to about 0.73 near 18.4 per cent. C o P Modified Proctor decreases from about 0.54 near 8.2 per cent to a minimum near 0.46 around 10.3 per cent, then rises to about 0.62 near 14.1 per cent.Compaction characteristics of copper tailings samples. Compaction curves in terms of void ratio