The proposed grading at a project site will consist of 25,100 m 3 of cut and 23,
ID: 1822492 • Letter: T
Question
The proposed grading at a project site will consist of 25,100 m3 of cut and 23,300 m3 of fill and will be a balanced earthwork job. The cut area has an average moisture content of 8.3%. The fill will be compacted to an average relative compaction of 93% based on a maximum dry unit weight of 18.3 kN/m3 and an optimum moisture content of 12.9% obtained from the modified Proctor test. Compute the volume of water in kiloliters that will be required to bring these soils to the optimum moisture content.
Explanation / Answer
Volume of dry soil fill = 23300 Weight of the soil = 0.93* 18.3* 23300 = 396542 kN Optimum moisture content = 12.9 % Required amount of moisture = (12.9 -8.3)% = 4.6 % Weight of water required = 0.046 * 396542 = 18241 kN Volume of water required = 1859 m3 So water required = 1859 kL
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