Problem
Earth-whose in situ weight is 112 11r/cf, whose loose weight is 95 Ibkf, and whose compacted weight is 120 Ib/cf-is placed in a fill at the rate of 240 cy/hr, measured as compacted earth. The thickness of the compacted layers is 6 in. A tractor pulls a towed sheepsfoot roller having drums, 5 ft wide, at a speed of 2 mph. Assume a 45-min hour operating efficiency. Determine the number of drums required to provide the necessary compaction if eight 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.