The specification for compaction states that the field-compacted soil must be at least 95% of the maximum control density and within 2% of the optimum moisture for the control curve. You dig a hole 1/30 ft3 in the compacted layer and extract a sample that weighs 3.8 lb wet and 3.1 lb dry. (a) What is the compacted γd? The compaction w? The percent compaction? Does the sample meet the specifications?

(b) If the density of solids is 2.68 Mg/m3 what is the compacted degree of saturation? If the sample were saturated at constant density, what would be the water content? (After C.W. Lovell)

Water Content (%)........................................ Dry Unit Weight (pcf)

14............................................................... 104

16............................................................... 105.5

18............................................................... 106

20........................................ .......................105

22........................................ .......................103.5

24........................................ .......................101