ISS Hot Applied Binder Materials for Pavement Preservation

1. ISS Hot Applied Binder Materials for Pavement Preservation ISS Seminar “At The Lodge” November 15, 2007

2. When Upgrading Asphalt Cement, Reclaimed Tire Rubber (CRM) is a Very Important Modifier, Singularly or in Conjunction with other Materials

3. ISS Blend Site Asphalt Storage & Heat Tank Asphalt Transport Asphalt-Rubber Heater Blender Spreader Truck Receiving Asphalt-Rubber Blend Crumb Rubber Hopper

4. Other Types of Blending Equipment

5. Rubber Particle Before Interaction

6. Crumb Rubber Particle After Interaction

7. Advantages of Crumb Rubber (CRM) As a Modifier in Asphalt Cement The use of CRM as a modifier in asphalt cement will result in a duel modification of the blended binder. The CRM also has specific additives contained in it as part of the tire manufacturing process. These additives allow for the binder to be highly resistant to aging and to maintain visco-elastic properties for a much longer period of time as compared to conventional asphalt or other modified asphalt binder materials.

8. ISS Supraton Mill / SBS Polymer Modification

9. Why Blend in the Field?

10. Viscosity Testing on the Project Site Quality Assurance – In The Field!

11. Binder Properties are Affected By: • Asphalt Cement: PG 70-10, 64-16, 58-22, 52-28 • Percentage of Tire Rubber • Percentage of High Natural Rubber (If Utilized) • Percentage of SBS Polymer (If Utilized) • Other Modifiers (If Utilized) • Reaction Time • Reaction Temperature • Type of Blender • Is the Siefer Mill Being Used? • Agitation (During and After Manufacture) • Agitation (During Application)

12. Advantages of Field Blended Binders in Spray Apply (Chip Seal) Applications Higher Binder Application Rates (Viscosity) Use of High Quality Pre-Coated Aggregate Resistance to Aging Resistance to Reflective Cracking Lower Initial Cost based on Alternative Lower Life Cycle Cost based on Reduced Maintenance Costs and Performance

13. Field Blended Binder Materials Polymer Modified Asphalt (PMA) Rubberized Scrub Seal Binder Rubberized Asphalt Binder (RAB) Asphalt-Rubber (A-R) Polymer Modified Asphalt-Rubber (PMAR)

14. Polymer Modified Asphalt (PMA) Usually 94 to 96 Percent PG Asphalt Cement and 4 to 6 Percent of Various Types of Polymer __________________________________________ Application Rates Binder - .30 to .50 Gallons Per Square Yard Aggregate – 18 to 26 Pounds Per Square Yard

15. Polymer Modified Asphalt (PMA)Physical Properties

16. Rubberized Scrub Seal Binder* Prepatory Seal or Massive Crack Filler Prior to Surface Treatment Usually 86 to 90 Percent of a Low Penetration Asphalt Cement and 10 to 14 Percent of a Fine Grind CRM and SBS Polymer Combination ____________________________________ Application Rates Binder - .20 to .50 Gallons Per Square Yard Aggregate or Sand – None Required

17. Rubberized Scrub Seal BinderPhysical Properties

18. Rubberized Asphalt Binder (RAB)* Equal / Alternate to Terminal Blend (AC 15-5TR or PG 76-22TR) Usually 89 Percent PG Asphalt Cement and 11 Percent of Fine Grind CRM and *Coarse Grind SBS Polymer Combination * Siefer Mill is Utilized to Sheer SBS Polymer _________________________________________ Application Rates Binder - .30 to .55 Gallons Per Square Yard Aggregate – 18 to 28 Pounds Per Square Yard

19. Rubberized Asphalt Binder (RAB)Physical Properties

20. Asphalt-Rubber Binder (A-R) Usually 80 to 85 Percent PG Asphalt Cement and 15 to 20 Percent of 12 to 14 Mesh CRM or a Combination of CRM and High Natural Rubber ________________________________________ Application Rates Binder - .55 to .75 Gallons Per Square Yard Aggregate – 26 to 36 Pounds Per Square Yard

21. Asphalt-Rubber (AR) Physical Properties

22. Polymer Modified Asphalt-Rubber(PMAR) Usually 82 to 85 Percent of PG Asphalt Cement and 15 to 18 Percent of 12 to 14 Mesh CRM and Fine Grind SBS Polymer Combination _________________________________________ Application Rates Binder - .60 to .75 Gallons Per Square Yard Aggregate – 26 to 36 Pounds Per Square Yard

23. Polymer Modified Asphalt-Rubber (PMAR) Physical Properties

24. Hot Applied Binder Application

25. Aggregate Quality-Variables-

26. SAM, SAMI and Cape Seal Aggregate Gradation Requirements 3/8 inch SAM & SAMI ½ inch SAM & SAMI

27. Other Aggregate Requirements ● 90% Has 2 – mechanically fractured faces ● ASTM C131 – 100 Revolutions, 7% loss ASTM C131 – 500 Revolutions, 30% loss ● Maximum of 8% Flat or Elongated Particles ● Sodium Sulfate Test May be Required ● Pre-coating Usually @ 0.5 to 0.75 %

28. Pre-coated Aggregate Application

29. What is the Difference Between These Various Binder Materials and Aggregate?Where Should These Different Materials be Used?

30. What About Your Pavement Condition?Strongly Consider Pavement Condition Index (PCI) as Your Guide!Remember Pre-Maintenance is Mandatory!!

31. What is the PCI of this Pavement? Which Binder Should be Used Here?

32. Rubberized Asphalt Binder (RAB)* Equal / Alternate to Terminal Blend (AC 15-5TR or PG 76-22TR) Usually 89 Percent PG Asphalt Cement and 11 Percent of Fine Grind CRM and *Coarse Grind SBS Polymer Combination * Siefer Mill is Utilized to Sheer SBS Polymer _________________________________________ Application Rates Binder - .30 to .55 Gallons Per Square Yard Aggregate – 18 to 28 Pounds Per Square Yard

33. Can you Effectively Crack-Seal or Patch a street in this Condition? What is the PCI? Which Binder Should be Used?

34. Asphalt-Rubber Binder (A-R) Usually 80 to 85 Percent PG Asphalt Cement and 15 to 20 Percent of 12 to 14 Mesh CRM or a Combination of CRM and High Natural Rubber ________________________________________ Application Rates Binder - .55 to .75 Gallons Per Square Yard Aggregate – 26 to 36 Pounds Per Square Yard

35. What About This Street? What is this PCI? Which Binder Should Be Used?

36. Polymer Modified Asphalt-Rubber(PMAR) Usually 82 to 85 Percent of PG Asphalt Cement and 15 to 18 Percent of 12 to 14 Mesh CRM and Fine Grind SBS Polymer Combination _________________________________________ Application Rates Binder - .60 to .75 Gallons Per Square Yard Aggregate – 26 to 36 Pounds Per Square Yard

39. Considering all of the VariablesLeads to:Long Term Performanceand Cost Effectiveness

40. Don’t Expect Miracles Pre-maintenance is Mandatory Consider Climatic Region Binder Design (PG Asphalt!) Construction Procedures (Details) Consider Traffic Conditions Consider Construction Date DON’T LET THE VARIABLES GET YOU DOWN!

41. Review - Advantages of Highly Modified Binder Materials in Spray Apply ApplicationsMore Than You Thought?

42. 1) Higher Binder Application Rates (.55 to 1.25 gallons per square yard)2) Resistance to Reflective Cracking3) Resistance to Aging = Longer Life (tire rubber!)4) Higher Percentage of Aggregate Embedment (26 to 34 pounds per square yard)5) Higher Percentage of Aggregate Retention6) Better Temperature Susceptibility7) High Production = Reduced Construction Time8) Alternative to Reconstruction9) Can be used in Many Systems & Applications (Phase Construction, Multi-Layer Systems)10) Low Cost11) Corrective vs. Rehabilitative Maintenance

43. Cost Considerations Agency: Budget and Fiscal Year (Timely Bidding) Project Size (Partnering) CIWMB Grants Pre Maintenance Costs Life Cycle Cost Contractor: Asphalt Cement and Fuel (Cost Going Way Up!) Mobilization Costs (Partnering) Scheduling & Construction (Partnering) Mother Nature (Early or Late Construction)

44. Discussion!