Conventional Pavement Structure

12.00 inchesGraded Aggregate Base

12.25 inchesAsphaltic Concrete Paving

Prepared Subgrade

stress

Inverted Pavement Structure

stress

2.00 inchesAsphaltic Concrete Paving

6.00 inchesGraded Aggregate Base

10.00 inchesCement Treated Base

Prepared Subgrade

Inverted Base Construction

Asphaltic Concrete Paving

Graded Aggregate Base

Cement Treated Base

SubgradeMinimum CBR Value of 15

Inverted Base Construction

Asphaltic Concrete Paving

Graded Aggregate Base

Cement Treated Base145 psi to 435 psi

Subgrade

Inverted Base Construction

Asphaltic Concrete Paving

Graded Aggregate Base86% of Apparent Density

Cement Treated Base

Subgrade

Inverted Base Construction

Asphaltic Concrete PavingFor Protection of GAB Layer

Graded Aggregate Base

Cement Treated Base

Subgrade

Material Depth Price

Subgrade 12 inches $12.52 y²

CTB 10 inches $15.53 y²

GAB 6 inches $6.26 y²

HMA 2 inches $5.10 y²

Material Depth Price

Subgrade 12 inches $12.52 y²

GAB 12 inches $12.52 y²

HMA 25 mm 9 inches $18.59 y²

HMA 19 mm 2 inches $4.91 y²

HMA 12.5 mm 1.5 inches $5.49 y²

Cost ComparisonsCost Comparisons

Inverted BaseStructure

GDOT InterstateStructure

Total Placement Cost = $39.41 y² Total Placement Cost = $54.03 y²