For a Modified Proctor Test, assume you calculated the water content w (%) of th

Question

For a Modified Proctor Test, assume you calculated the water content w (%) of the soil and total unit weight yr (kN/m3) the way we reviewed in class. The numbers are reported in Table 1 below a) (20 pts) Plot the compaction curve, S-80%, and zero-air-voids (s-100%) curves (assuming Gs-2.8) preferably using Excel (hand-draw the compaction curve after plotting the data points and constant-S lines in excel). b) (10 pts) Determine the optimum water content Wopt and maximum dry unit weight Yd,max- [Note that one of the data points could be erroneous. You could choose to ignore this point when plotting the compaction curve by hand.] Table 1. Modified Proctor Test results for Problem 5 2.33 4.17 5.01 6.1 7.64 8.43 8.63 9.71 10.03 12.22 13.29 20.54 21.36 21.45 22.37 22.92 23.66 23.45 23.56 23.10 13.04 21.70

Explanation / Answer

from compaction graph optimum water content is 9.8%

maximum dry density is 23.7kn/m3

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