NDOR Research Conference: Matt Beran

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Nebraska Department of Roads Conference 2012
Presented by Matt Beran

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NDOR Research Conference: Matt Beran

  1. 1. Impact of Warm Mix Asphalt in Nebraska Matt Beran, P.E. Assistant Flexible Pavements Engineer Nebraska Department of Roads
  2. 2. Overview
  3. 3. What is Warm Mix Asphalt?(WMA)• Hot Mix Asphalt designs that are modified to be produced, placed and compacted at 20-100°F less than typical Hot Mix Asphalt (HMA).
  4. 4. What is Warm Mix Asphalt?
  5. 5. Types of Additives
  6. 6. Warm Mix Asphalt Benefits• Fuel Savings
  7. 7. Fuel Savings• Fuel prices almost 3 times higher than last year• 10-20% potential fuel savings• Potential savings of $1 million each year
  8. 8. Warm Mix Asphalt Benefits• Fuel Savings• Improved Workability – Allows for longer haul distances – Extended paving season
  9. 9. Longer Haul Distances
  10. 10. Extended Paving Season• December Paving (1 hour haul)
  11. 11. Warm Mix Asphalt Benefits• Fuel Savings• Improved Workability – Allows for longer haul distances – Extended paving season• Reduced Emissions (Greenhouse Gases) – Will be key with continuing environmental regulations
  12. 12. Reduced Emissions
  13. 13. Reduced Emissions
  14. 14. Reduced Emissions
  15. 15. Warm Mix Asphalt Benefits• Fuel Savings• Improved Workability – Allows for longer haul distances – Extended paving season• Reduced Emissions (Greenhouse Gases) – Will be key with continuing environmental regulations• Improved Work Environment
  16. 16. Improved Work Environment
  17. 17. Warm Mix Asphalt Benefits• Fuel Savings• Improved Workability – Allows for longer haul distances – Extended paving season• Reduced Emissions (Greenhouse Gases) – Will be key with continuing environmental regulations• Improved Work Environment• Possible Less Aging of Asphalt Binder• Improved Plant Performance – Reduced wear on plant
  18. 18. Warm Mix Asphalt History• 1997: First pavements constructed in Europe• 2004: First U.S. field trails in Florida and North Carolina• 2006: Numerous field trails around U.S.• 2007: First field trail in Nebraska• 2008: Second field trial in Nebraska – Over 200 WMA test sections across U.S.
  19. 19. Overview
  20. 20. Research Need• Verify national findings• Testing WMA with local conditions – Both laboratory and field testing – Evaluate if there is a superior type• See if WMA can perform as good or better than HMA
  21. 21. UNL Research Project Plan
  22. 22. Warm Mix Project Locations• STILL NEED TO GET CORRECT GRAPHIC
  23. 23. Warm Mix Project Locations
  24. 24. Highway 12: Monowi toVerdel• Sasobit able to give 80°drop in temperature• No problems when switching to Sasobit• No blue smoke with Sasobit• 15% fuel savings
  25. 25. Highway 14: Elgin to US-20• 50°drop in temperature• More viscous feeling than HMA• No smoke with both Zeolite and Evothern• Minimal fuel savings
  26. 26. Visual Evaluation (‘09 & ‘11)
  27. 27. Research Needs• Verify National Findings• Testing WMA with local conditions – Both laboratory and field testing – Evaluate if there is a superior type• See if WMA can perform as good or better than HMA
  28. 28. Overview
  29. 29. Benefits for Nebraska• Accelerated timeline for implementation• Increased NDOR confidence in WMA• Increased contractor’s awareness• Met FHWA goals for WMA• WMA specification adopted January 2012• Will be utilizing on at least 4-6 projects this year – Also on 2-3 Country Projects
  30. 30. Warm Mix Asphalt Benefits
  31. 31. CREDITSClick to edit or add your credits Click to editSlide design © 2009, Mid-America Transportation Center. All rights reserved.

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