1. Effect of Recovered Binder From Recycled Shingles
Ramon Bonaquist, P.E.
Chief Operating Officer
Advanced Asphalt Technologies, LLC

2. Acknowledgement Wisconsin Highway Research Program Project 0092-10-06
Effect of Recovered Binders from Recycled Shingles and Increased RAP Percentages on Resultant Binder PG
WHRP 11-13

3. Topics Recycling in Asphalt Paving Performance Grading System
Effect of Adding Recycled Binder
Wisconsin Data for RAP and RAS
Summary and Producer Options

4. Why Use Recycled Asphalt?
Reduce cost
Sustainability
2001 FHWA Recycled Materials Policy---
“…recycled materials should get first consideration in materials selection … and Restrictions that prohibit the use of recycled materials without technical basis should be removed from specifications.”

5. Sources of Recycled Asphalt
Reclaimed Asphalt Pavement (RAP)
Recycled Asphalt Shingles (RAS)
5 % asphalt binder
95 % well graded aggregate
20 % hard asphalt binder
75 % fine aggregate
5 % fiber
Manufacturer waste
Old roofs (tear offs)

6. 2011 Quantities
366 Million Tons HMA/WMA

7. Specifications
Recycled Mixtures Must Meet Same Performance and Quality Standards
Same Strength and Durability
Produced with Same Variability

8. Binder Grade Selection
Performance Grading System
Performance Grade
PG 64-22
High Pavement Temperature, °C
Low Pavement Temperature, °C

9. Performance Grading Production Rutting Fatigue Cracking
Thermal Cracking
46 to 82 °C
135 °C
4 to 40 °C
0 to -36 °C
Rotational Viscometer
Dynamic Shear Rheometer
Bending Beam Rheometer
Direct Tension
Unaged
Rolling Thin Film Oven
Pressure Aging Vessel

10. PG Criteria

11. Effect of Aged Asphalt Binder
Increased mixture stiffness
Greater potential for thermal cracking
Controlled by Binder Performance Grade

12. Blending Chart – Engineering Tool
Estimate Performance Grade of Blended Binders
Virgin Binder
Recycled Binder
% Recycled Binders

13. Blending Chart Example
Binder Replacement, %
Virgin Binder
RAP Binder
32 %

14. Wisconsin Recycled Asphalt
12 RAP Sources
6 RAS Sources
Property
Average Continuous Grade, C
High
82.8
Intermediate
26.9
Low
-21.8
Property
Average Continuous Grade, C
High
116.7
Intermediate
32.7
Low
-6.5

15. Low Temperature Grade RAS 0.23 C/% RAP 0.08 C/%
Must be below Specification Limit

16. Intermediate Temperature Grade
RAS
0.15 C/%
RAP
0.09 C/%
Must be below Specification Limit

17. High Temperature Grade
RAS
RAP
0.56 C/%
0.22 C/%
Must be Above Specification Limit

18. Summary and Producer Options
RAS Grade Change is About Double RAP Grade Change
Use Softer Virgin Binder
Availability
Storage
Produce as Warm Mix Asphalt
Small effect ~ 4-5 % Additional RAS Binder
Concerns with blending
Use a Rejuvenator or Modifier
Cost

19. Questions/Discussion
Ramon Bonaquist
Advanced Asphalt Technologies, LLC
108 Powers Court, Suite 100
Sterling, VA 20166