Civil Engineering Materials #$5\mathrm{.}14$

Coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained:

Volume of bucket: $\frac{1}{2}f{t}^3$

Weight of empty: $20\mathrm{.}3lb.$

Weight of bucket filled with dry rodded coarse aggregate:

Trial $1$: $76\mathrm{.}6lb.$

Trial $2$: $75\mathrm{.}1lb.$

Trial $3$: $78\mathrm{.}8lb.$

a$.$ Calculate the average dry$-$rodded unit weight.

b$.$ If the bulk dry specific gravity of the aggregate is $2\mathrm{.}620,$ calculate the percent voids between aggregate particles for each trial.