Problem
Earth whose in situ weight is 110 Ibkf and whose compacted weight is 124 lb/pf is placed in a fill at the rate of 280 cy/hr, measured as compacted earth. The thickness of the compacted layers is 8 in. A tractor pulls a towed sheepsfoot roller having drums. 6 ft wide, at a speed of 1.4 mph. Assume a 50-min hour operating efficiency. Determine the number of drums required to provide the necessary compaction if four drum passes are specified for each layer of earth.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.