Problem 3 (30 points) Instructor: Tadahiro Kishida The following results were obtained from a standard Proctor compaction tests. The mold has the volume of 944 cm². Mass of mold (g) Sample No Moisture content, w (%) 1 2 3 4 5 7.7 11.6 15.9 18.9 23.6 1929 1929 1929 1929 1929 Mass of compacted soil and mold (g) 3560 3760 3910 3869 3716 Wet unit weight (kN/m3) Dry unit weight (kN/m3) (a) Plot a graph. 22 21 20 19 18 17 16 15 14 0 5 10 15 20 Figure 1. Ya vs. w for compaction tests (b) Determine the maximum dry unit weight 25 25 30

Fig: 1