Q$.2$

$(10$ points$)$

An asphalt pavement structural cross section consists of $6-$inch asphalt layer atop an $8"$

aggregate base over a subgrade layer with an elastic modulus of $10,000$ psi. Assuming

a layer coefficient of the asphalt mix of $0\mathrm{.}44$ and that for the aggregate base $0\mathrm{.}12,$ a

drop in serviceability of $2\mathrm{.}0,$ and overall standard deviation of $0\mathrm{.}45$ and a reliability

level of $90\%.$ Drainage quality is good with $10\%$ of the time the pavement structure

remains saturated. Determine the ESAL predicted to use the pavement during the

pavement life. For full credit, show your work on the attached nomograph.