A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Recycling Asphalt Pavements Containing Modified Binders
The objective of Phase I of this research was to evaluate the current state of the practice in New England/New York Region regarding the use and specifications of modified binders. Existing literature regarding Modified Binders was reviewed; State Transportation Agencies and their suppliers were surveyed. The purpose of the inquiries was to determine which types of modified asphalt binders are being used in the Northeast currently. The inquiries were intended to define what constitutes modified binder and provide a working definition that is regionally accepted by users of modified binders. Phase II examines effects of combining RAP with HMA that is composed of different PG binder grades and different types of polymer and acid modification. This research attempts to address whether there is cause for concern with respect to incompatibility when combining RAP with different types of modified asphalt. Asphalt in designed mixes is expected to maintain characteristics such as flexibility at lower temperatures and elasticity to resist deformation at higher temperatures. Once RAP of unknown origin is combined into the mix, there is risk that the chemistry of the virgin binder in the mix could be altered, thus, reducing benefits of the modifier.
Recycling Asphalt Pavements Containing Modified Binders
The objective of Phase I of this research was to evaluate the current state of the practice in New England/New York Region regarding the use and specifications of modified binders. Existing literature regarding Modified Binders was reviewed; State Transportation Agencies and their suppliers were surveyed. The purpose of the inquiries was to determine which types of modified asphalt binders are being used in the Northeast currently. The inquiries were intended to define what constitutes modified binder and provide a working definition that is regionally accepted by users of modified binders. Phase II examines effects of combining RAP with HMA that is composed of different PG binder grades and different types of polymer and acid modification. This research attempts to address whether there is cause for concern with respect to incompatibility when combining RAP with different types of modified asphalt. Asphalt in designed mixes is expected to maintain characteristics such as flexibility at lower temperatures and elasticity to resist deformation at higher temperatures. Once RAP of unknown origin is combined into the mix, there is risk that the chemistry of the virgin binder in the mix could be altered, thus, reducing benefits of the modifier.
Recycling Asphalt Pavements Containing Modified Binders
J. Mahoney (author) / S. Zinke (author) / J. DaDalt (author) / A. Zofka (author) / A. Bernier (author)
2011
67 pages
Report
No indication
English
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