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. Impact of Warm Mix Asphalt in Nebraska Matt Beran, P.E. Assistant Flexible Pavements Engineer Nebraska Department of Roads
- 2. Overview
- 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. What is Warm Mix Asphalt?
- 6. Warm Mix Asphalt Benefits • Fuel Savings
- 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. Warm Mix Asphalt Benefits • Fuel Savings • Improved Workability – Allows for longer haul distances – Extended paving season
- 10. Extended Paving Season • December Paving (1 hour haul)
- 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
- 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
- 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. 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. Overview
- 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. UNL Research Project Plan
- 22. Warm Mix Project Locations • STILL NEED TO GET CORRECT GRAPHIC
- 23. Warm Mix Project Locations
- 24. Highway 12: Monowi to Verdel • Sasobit able to give 80°drop in temperature • No problems when switching to Sasobit • No blue smoke with Sasobit • 15% fuel savings
- 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
- 27. Visual Evaluation (‘09 & ‘11)
- 28. 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
- 29. Overview
- 30. 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
- 31. Warm Mix Asphalt Benefits
- 32. CREDITS Click to edit or add your credits Click to edit Slide design © 2009, Mid-America Transportation Center. All rights reserved.