Warm Mix Asphalt - A Greener Alternative to Hot Mix Asphalt
Warm Mix Asphalt is defined as a group of technologies that allow for a reduction in the temperatures at which asphalt mixes are produced and placed relative to traditional Hot Mix Asphalt (HMA). WMA is produced and placed at temperatures 20 to 50 deg C less than conventional HMA. The production and paving of asphalt at these reduced temperatures generates fewer emissions and requires less energy while maintaining or enhancing pavement performance. MTO began preliminary research on the application of WMA to Ontario roads in 2006, followed by initial WMA trial contracts in 2008. To evaluate the environmental benefits of WMA, MTO required additional tests and measurements be performed on several of the 2010 contracts. These included emissions measurements at both the asphalt manufacturing plant and paving site, temperature measurements of the WMA during production and paving, and additional tests to assess WMA pavement performance . In these trial contracts, WMA paving occurred at temperatures 10 to 30 deg C lower than conventional HMA without any adverse effects on asphalt properties. The WMA trials were successful and supported increased WMA usage. As a result, MTO decided to target 10 percent WMA use on contracts completed in 2011. In addition, MTO decided to include larger tonnages of WMA than in previous years, and to use WMA in both the binder course and surface course layers. This project was nominated for the TAC 2011 Environmental Achievement Award. For the covering abstract of this conference see ITRD record number 201211RT334E.
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Corporate Authors:
Transportation Association of Canada (TAC)
401-1111 Prince of Wales Drive
Ottawa, Ontario Canada -
Authors:
- POLITANO, L
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Conference:
- 2012 CONFERENCE AND EXHIBITION OF THE TRANSPORTATION ASSOCIATION OF CANADA - TRANSPORTATION: INNOVATIONS AND OPPORTUNITIES
- Location: Fredericton New Brunswick, Canada
- Date: 2012-10-14 to 2012-10-17
- Publication Date: 2012
Language
- English
Media Info
- Pagination: 14 p.
- Monograph Title: 2012 Conference and Exhibition of the Transportation Association of Canada - Transportation: Innovations and Opportunities
Subject/Index Terms
- TRT Terms: Admixtures; Bituminous mixtures; Conferences; Durability; Energy; Field tests; Measurement; Pollutants; Temperature; Vehicle performance
- Uncontrolled Terms: In service behavior
- Geographic Terms: Canada
- ITRD Terms: 4736: Admixture; 4967: Bituminous mixture; 8018: Canada; 8525: Conference; 5910: Durability; 2442: Emission; 213: Energy; 9121: In service behaviour; 6226: In situ; 6136: Measurement; 6722: Temperature
- Subject Areas: Energy; I15: Environment; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;
Filing Info
- Accession Number: 01480635
- Record Type: Publication
- Source Agency: Transportation Association of Canada (TAC)
- Files: ITRD, TAC
- Created Date: May 1 2013 1:21PM