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Recycled Asphalt Shingles in HMA Implementation: A Perspective from Wisconsin

Recycled Asphalt Shingles in HMA Implementation: A Perspective from Wisconsin. CMRA Webinar on New Specifications and Implementation June 15 th , 2010. Have an Idea. Hey, how about if we …. Mmmm, Has potential, but how … do we reach it?. Define steps that make it attainable ….

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Recycled Asphalt Shingles in HMA Implementation: A Perspective from Wisconsin

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  1. Recycled Asphalt Shingles in HMAImplementation:A Perspective from Wisconsin CMRA Webinar on New Specifications and Implementation June 15th, 2010

  2. Have an Idea Hey, how about if we … Mmmm, Has potential, but how … do we reach it? Define steps that make it attainable …

  3. Building the Ladder To Implementation • Identify Areas of Impact or Concern • Seek Technical Advice • Data • Others Experience • Evaluate the Current Process • Define Risks • Estimate Cost to Implement as well as Not Implementing • Suggest Adjustments to Current Rules • Follow-up with Performance Assessment

  4. Identify Groups Needing to Interact

  5. Partner a Plan : Have a Gathering HMA Technical Team (long standing group) Members include Reps from: DOT (10) FHWA (1) HMA Industry (7) Consultants (1) Independents (2) Guests and Outside Speakers

  6. Expand Groups For Specialized Topics • Academia • Other State DOTs • Other DOT Areas of Expertise • Local Municipalities • DNR or EPA • Suppliers • Researchers • Community or Retirees • Skeptic or Two

  7. Add Actions to the Plan • Subcommittee or Task Group • Meet More Often • Expand Expertise • Gather and Analyze Data • Make Recommendations • Suggest Specification Edits • Pen Draft Language • Present back to the Technical Team

  8. Construction & Materials Specifications • Understand Content • Production Limits or Restrictions • Guidance Documents • Acceptance Parameters • ASSHTO/ASTM Testing Procedures • Specification Revision Schedule & Deadlines • Feasibility or Budget for Pilot/Demo Projects

  9. Recycled Asphaltic Materials • Reminder: All Wisconsin DNR requirements must also be met for the use of these products • Covered in standard specifications under 107.1(1) “At all times, observe and comply with all applicable federal and state laws and administrative rules, codes, local laws, ordinances, and regulations that affect the conduct of the work, and applicable orders or decrees of bodies or tribunals having jurisdiction or authority over the work.” • New requirements are based on % binder replacement instead of % by weight as used in the past

  10. Out with the Old • Specifications controlling the use of RAP were similar to most others • 460.2.5 Reclaimed Asphaltic Pavement Materials (1) The contractor may use up to 35 percent RAP material in lower layer and base mixtures and up to 20percent in upper layer mixtures. Ensure that the combined RAP and virgin aggregate conforms to aggregate requirements of table 460-2.

  11. RAP, RAS, and Pbr Define Where We Are to Evaluate Potential New Risk Binder is the main concern so option to treat all recycled binder the same Pbr = Percent Binder Replacement

  12. Chronology of Success Action delays can cost more than a month or two in terms of construction seasons Revisions submitted Mar ‘10 to affect 2011 Task Group Fall ‘08 ASP Jan 09 ASP moved to SS. 460 for 2010 Nov ‘08 Final Draft 4 projects @ contractor option ‘09

  13. The Answer’s in the Details • Subcommittee Established • Met Weekly for First 4 Meetings • Defined what we knew, what we didn’t => Collection Tasks • Analyzed Additional Information/Data => Draft Language • Set Recommendations for Limits => Near Final Draft • Present Draft to HMA Technical Team => Special Provision • Address FAQs => Submit & Develop Field Procedures • Create Presentations for Knowledge Transfer & Awareness • Seek Funding for Expanded or Related Research http://roadwaystandards.dot.wi.gov/standards/stndspec/Sect460.pdf

  14. WHAT’s NEXT? Follow-up for 2010: • Collect Additional Data for Review • Mixture Design • Field Production • Binder Affects • Quality Management Program Impacts • Monitor Materials Availability • Evaluate Product Performance • Report Findings • Identify Potential Language Tweaks

  15. For Further Information Contact Thomas Brokaw Asphalt, Aggregate, & Soils Engineer Materials Laboratory Supervisor Co-Chair HMA Technical Team WisDOT Bureau of Technical Services (608)246-7934 thomas.brokaw@dot.wi.gov OR ….. Judie Ryan HMA Engineering Specialist Wisconsin Highway Research Chair –Flexible Pavements WisDOT Bureau of Technical Services (608)246-5456 judith.ryan@dot.wi.gov OR …..

  16. Stop In and See Us This Summer AASHTO Subcommittee on Materials 96th Annual Meeting Sunday, August 08, 2010 - Friday, August 13, 2010 Being held in Madison, WI http://www.transportation.org/meetings/261.aspx U.S. Department of Transportation

  17. Questions? Thank You CMRA for the Opportunity !

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