Overview of Warm Mix Asphalt Paving Technologies
The asphalt paving industry is constantly exploring technological improvements that will enhance the material's performance, increase construction efficiency, conserve resources, and advance environmental stewardship. Current and impending regulations on emissions and energy conservation are making attractive the reduction in asphalt mix production temperature. Warm Mix Asphalt (WMA) is a means to this end and several systems have been developed including: foaming, emulsions, additives, synthetic binders and others. Warm mix asphalt is produced at temperatures 20 to 40oC lower than Hot Mix Asphalt (HMA). The immediate benefit of lower temperatures is the reduction in energy consumption, greenhouse gas emissions, fumes, and odours generated at the plant and the paving site. The technical benefits are substantial, including reduction of short term binder hardening, reduction of mixture tenderness, possible increase of percentage of reclaimed asphalt pavement in new asphalt pavement mixes, and possible extension of the construction season. This paper presents an overview of the current warm mix asphalt state-of-practice. A review of the various warm mix asphalt systems is provided. Findings of various studies concerning the observed and measured field performance and the environmental benefits in terms of energy conservation and reduced greenhouse gas emissions are also detailed.
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Corporate Authors:
Polyscience Publications
P.O. Box 1606, Station St Martin
Laval, Quebec Canada H7V 3P8 -
Authors:
- Croteau, JM
- TESSIER, B
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Conference:
- Proceedings of the Fifty-third Annual Conference of the Canadian Technical Asphalt Association (CTAA)
- Location: Saskatoon Saskatchewan, Canada
- Date: 2008-11-0 to 2008-11-0
- Publication Date: 2008
Language
- English
Media Info
- Media Type: Print
- Pagination: p. 333-46
- Monograph Title: Proceedings of the Fifty-Third Annual Conference of the Canadian Technical Asphalt Association (CTAA): Saskatoon, Saskatchewan, November 2008
Subject/Index Terms
- TRT Terms: Air quality management; Benefit cost analysis; Bituminous materials; Conferences; Durability; Environment; Mix design; State of the art reports; Temperature; Vehicle performance
- Uncontrolled Terms: In service behavior
- Geographic Terms: Canada
- Subject Areas: Data and Information Technology; Finance; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;
Filing Info
- Accession Number: 01120612
- Record Type: Publication
- Source Agency: Transportation Association of Canada (TAC)
- Files: TAC
- Created Date: Feb 2 2009 7:41AM