A fill area needs 2,040 compacted cubic yards. If shrinkage from loose to compacted volume is 15 percent, what loose volume is needed?
Correct Answer
C) 2,400 cy
Loose volume is 2,040 / 0.85 = 2,400 cy.
Why This Is the Correct Answer
Loose volume is 2,040 / 0.85 = 2,400 cy.
Why the Other Options Are Wrong
Option A: 2,160 cy
loose volume for compacted fill, choice b: 2,160 cy is wrong because 2,160 cy implies compacted volume is about 94.44 percent of loose volume; the accepted shrinkage factor is 85 percent in.
Option B: 2,640 cy
loose volume for compacted fill, choice c: 2,640 cy implies compacted volume is about 77.27 percent of loose volume; the accepted shrinkage factor is 85 percent in.
Option D: 1,734 cy
loose volume for compacted fill, choice d: 1,734 cy implies compacted volume is about 117.65 percent of loose volume; the accepted shrinkage factor is 85 percent in.
Memory Technique
Picture a panel space labeled loose volume for compacted fill: finish every operation before accepting 2,400 cy.
Reference Hint
Open Pipe and Excavation Contracting, 2011; use by topic index - earthwork volume / swell / shrink to confirm that Loose volume is 2,040 / 0.85 = 2,400 cy.
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