A contractor is excavating a site for a basement construction. The total volume of

excavation is $15,000y{d}^3$ in dense sand. The void ratio of the soil at site is $0\mathrm{.}5$ and the

degree of saturation is $30\%.$ When the material is excavated, the sand loosened and the

void ratio increased to $0\mathrm{.}8.$

a$.$ To haul away the excavated soil, the contractor is using trucks which have a

maximum capacity of $10y{d}^3.$ How many truck loads of soil will have to be hauled

away, if the full capacity of the truck is utilized? $[$Ans$.1,800$ loads$]$

b$.$ According to city ordinance, the maximum legal weight that trucks can carry is $10$

tons. Can the truck driver be cited if he is carrying soil to the maximum capacity $($by

volume$)?$ Assume specific gravity of soil solids to be $2\mathrm{.}65.[$Ans$.$ Yes. Soil weight is

$13\mathrm{.}1$ ton$]$