Life Cycle Cost Analysis $($LCCA$)$

Existing Pavement Design

$9"$ jointed plain concrete slab

$4"$ cement$-$treated base

Silty clay subgrade

Rural, $4-$lane divided highway

Contraction joints are spaced at $18\text{'}$ on center

The pavement is $15$ years old.

Existing Pavement Condition

$7\%$ of the slabs in the outer lane experience medium to high severity transverse cracks

Random spalling along joints and cracks is present

$20\%$ of the joints exhibit low to medium severity faulting

The average PSI is $2\mathrm{.}8$

The asphalt shoulder is in fair condition

Feasible Repair Alternatives

$\backslash$table$[[$Work Item,Alternative $1,$Alternative $2,$Alternative $3],[$Replace cracked slabs $($FDR$),$Yes,$],[$Partial depth repairs of spalls,Yes,Yes,$],[$Stabilize slabs,Yes,Yes,$],[$Subdrains$,$Yes,Yes,$],[$Grind faults,Yes,,Yes$],[$AC Overlay,,,$],[$Replace outer lane,,,Yes$],[$PCC tied shoulder,,$12,20],[$Initial service life $($years$),7,,]]$

Assume an analysis period of $20$ years for an equal performance period. Assume a discount rate of $4\%.$

$1$