Question No$.2(2$ Points$)$

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 $=14L$

Weight of empty bucket $=9\mathrm{.}21kg$

Weight of bucket filled with dry rodded coarse aggregate: Trial $1=34\mathrm{.}75kg$

Trial $2=34\mathrm{.}06kg$ Trial $3=35\mathrm{.}74kg$

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.