1. Florida APT Update

2. Current APT Research Asphalt segregation
Tack coat rate effect on cracking resistance
Asphalt density
FC-5 thickness
High polymer binder

3. Asphalt Segregation Impact of segregation on pavement performance
Develop/refine methods to quantify segregation using texture measurements (CTM)
Finalizing report

4. Asphalt Segregation

5. Tack Coat Rate
Inadequate tack coat may increase top-down cracking potential
Three residual tack coat rates
0.02 gal/sy, 0.04 gal/sy, & 0.06 gal/sy
One unbonded section

6. Asphalt Density Three densities were targeted
87%, 90%, and 93%
Establish guidelines for inspectors

7. FC-5 Thickness
Thicker open-graded friction courses ravel & rut quicker
FC-5 placed at 0.75, 1.25, and 2 inches thick
PG & PG binders
1.5-inch SP-12.5 w/ PG 76-22
10.5-inch limerock base
12-inch granular subbase
FC-5 Variable thickness

8. High Polymer Binder
PG HP vs. PG rutting & cracking comparison
Two binder contents for PG HP
Design AC content
Design AC content + 0.5%

9. Concrete Test Road Two construction phases Phase 1 Phase 2
Earthwork
Instrumentation infrastructure
Work began Nov 1
Phase 2
Concrete paving
Scheduled to let July 2018
More details