Warm-mix asphalt : European practice.
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2008-02-01
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Creators:D’Angelo, John ; Harm, Eric ; Bartoszek, John ; Baumgardner, Gaylon ; Corrigan, Matthew
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Cowsert, Jack
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Harman, Thomas
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Jamshidi, Mostafa
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Jones, Wayne
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Newcomb, Dave
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Prowell, Brian
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Sines, Ron
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Yeaton, Bruce
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Abstract:Warm-mix asphalt (WMA) is a group of technologies that allow a reduction in the temperatures at which ; asphalt mixes are produced and placed. These technologies tend to reduce the viscosity of the asphalt and ; provide for the complete coating of aggregates at lower temperatures. WMA is produced at temperatures ; 20 to 55 °C (35 to 100 °F) lower than typical hot-mix asphalt (HMA). In 2007, a team of U.S. materials ; experts visited Belgium, France, Germany, and Norway to evaluate various WMA technologies through ; the Federal Highway Administration’s International Technology Scanning Program. ; The scan team learned that the benefits of WMA technologies include reduced fuel usage and emissions in ; support of sustainable development, improved field compaction, which can facilitate longer haul distances ; and cool weather pavement, and better working conditions. A range of technologies is available to produce ; WMA. European agencies expect WMA performance to be the same as or better than the performance ; of HMA. Although several areas need to be addressed as these technologies are adapted to U.S. materials ; and production practices, the scan team believes that the United States has no long-term barriers to WMA ; use. With additional research and trials, the team expects that highway agencies will allow WMA as an ; alternative to HMA.
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Main Document Checksum:urn:sha-512:2b25fc871253077273d248ec92d3d5d6dc5ac29cb5ccee32c64e22eb680e1eda1244103a428fca4055f46800c9da30a8d65bf9a468fddc1f81a55ba7b7fd8273