Performance assessment of warm mix asphalt (WMA) pavements : executive summary report.

757338738Executive summary report.PDFTech ReportFHWA/OH-2009/08134312Warm mix paving mixturesPaving materialsOhioOhio. Dept. of Transportation. Office of Research and DevelopmentSargand, Shad M.Figueroa, J. LudwigOhio. Dept. of Transportation. Office of Research and DevelopmentNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceUS Transportation CollectionWarm Mix Asphalt (WMA) is a new technology which wasintroduced in 1995 in Europe. WMA is gaining attention allover the world because it offers several advantages overconventional asphalt concrete mixes. The benefits include:(1) Reduced energy consumption in asphalt mixtureproduction process; (2) Reduced emissions, fumes, andundesirable odors; (3) More uniform coating of aggregatewith binder, which should reduce surface aging; and (4)Extended construction season in temperate climates. WMArequires the use of additives to reduce the temperature ofproduction and compaction of asphalt mixtures. WMAtechnologies include:-Aspha-min, the addition of sodium aluminumsilicate or zeolite to the asphalt mix.-Sasobit, the addition of a paraffin-wax compoundextracted from coal gasification.-Evotherm, the addition of an emulsion to improvethe coating and workability of WMA mixes