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A platform for research: civil engineering, architecture and urbanism
Polymer-Modified Asphalt Emissions from Alaskan Hot Plants—A Questionnaire Study
A questionnaire and a literature study were conducted to collect information from private contractors regarding the emissions produced when using polymer-modified asphalt (PMA) pavements in cold regions. The purpose of the study was to investigate if the emissions could be eliminated or reduced with existing experiences and information. The emphasis of the study was to investigate factors such as equipment, method of mixing asphalt and aggregate, fuel used to heat aggregate, and the materials used that might be causing the emission problems. On the basis of the research, it was concluded that the existing mixing plants are mostly drier drums older than 10 years, and the asphalt is mixed with aggregate through superheated air in the drum. The most commonly used fuel is diesel #2. The materials used included base asphalts AC-5 and AC-2.5, SBS and crumb rubber modifiers, and proprietary blends. Based on the small amount of materials used by the questionnaire responders, it was impossible to determine which materials create most emissions. Recommendations were given to reduce emissions by using batch plants or modifying existing dryer drums to include special compartments for the mixing of asphalt with the aggregate, and by not exceeding the ideal mixing temperatures.
Polymer-Modified Asphalt Emissions from Alaskan Hot Plants—A Questionnaire Study
A questionnaire and a literature study were conducted to collect information from private contractors regarding the emissions produced when using polymer-modified asphalt (PMA) pavements in cold regions. The purpose of the study was to investigate if the emissions could be eliminated or reduced with existing experiences and information. The emphasis of the study was to investigate factors such as equipment, method of mixing asphalt and aggregate, fuel used to heat aggregate, and the materials used that might be causing the emission problems. On the basis of the research, it was concluded that the existing mixing plants are mostly drier drums older than 10 years, and the asphalt is mixed with aggregate through superheated air in the drum. The most commonly used fuel is diesel #2. The materials used included base asphalts AC-5 and AC-2.5, SBS and crumb rubber modifiers, and proprietary blends. Based on the small amount of materials used by the questionnaire responders, it was impossible to determine which materials create most emissions. Recommendations were given to reduce emissions by using batch plants or modifying existing dryer drums to include special compartments for the mixing of asphalt with the aggregate, and by not exceeding the ideal mixing temperatures.
Polymer-Modified Asphalt Emissions from Alaskan Hot Plants—A Questionnaire Study
Bethard, Todd (author) / Zubeck, Hannele (author)
11th International Conference on Cold Regions Engineering ; 2002 ; Anchorage, Alaska, United States
Cold Regions Engineering ; 336-347
2002-05-08
Conference paper
Electronic Resource
English
Polymer-Modified Asphalt Emissions from Alaskan Hot Plants A Questionnaire Study
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