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1b. As per the compaction specification, a highway fill has to be compacted to 95% of
Standard Proctor Compaction test density. A borrow area available near the project site
has a dry density of 1.65 g/cm3 at 100% compaction and a natural void ratio of 0.61. The
specific gravity of the soil solids is 2.65. Compute the volume of borrow material needed
to construct a highway fill of height 5 m and length 1 km with side slopes of 1:1.5. The
top width of the fill is 8 m