Question

A 100 CY is removed from an excavated job site, with soils having an expansion rate of 33%. Therefore, how CYs of excavated soil will need to be removed from the site?

How many 12 CY dump trucks loads would be required to remove the excavated soil from the site?

How many cubic yards expanded slab base, with a 33% expansion rate, would need to be ordered to fill a 100 CY hole, with the slab base material compacted to 100%?

Answer 1

Excavated soil = 100 CY

After expansion excavated soil = 100*(1+.33) = 133 CY

Therefore, 133 CY of excavated soil is to be removed from the site.

Number of 12 CY dump trucks needed to remove the excavated soil from the site is = 133/12 = 11.08~12 trucks

Therefore,12 trucks of 12 CY dump trucks are needed to remove the excavated soil from the site.

Quantity of slab base material with 33% expansion rate required to fill the 100 CY hole. = 100/1.33 = 75.188 CY