Question

For constructing an embankment, the soil is transported from a borrow area using a truck which can carry $6m^3$ of soil at a time. The details are as follows.

Property	Borrow area	Truck (loose)	Field (compacted)
Bulk density(g/cc)	1.66	1.15	1.82
Water content (%)	8	6	14

The number of truck loads of soil required to obtain $100m^3$ of compacted earth fill

• A. 12 nos.
• B. 56 nos.
• C. 25 nos.
• D. 33 nos.

Answer 1

The correct option is C 25 nos.

Weight of solid remains same in case of truck.
Weight of soild carried through truck

$=159.649\frac{g}{cc}{m}^3$

Weight of soil carried through truck.

$W_s=\frac{W}{1+w}$

$159.649=\frac{W}{1+0.06}$

$W^{\prime }=169.227\frac{g}{cc}{m}^3$

Volume of soil carried through truck

$=\frac{169.227}{1.15}=147.155m^3$

$No.oftruck=\frac{147.155}{6}=24.525$

$\approx 25.$