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
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.
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
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
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