Evaluation of the Degree of Blending of Reclaimed Asphalt Pavement (RAP) For Warm Mix Asphalt

Gaitan, Luis; Mehta, Yusuf A.; Nolan, Aaron; DuBois, Eric; Reger, Darren; Purdy, Caitlin; Batten, Eileen; McCarthy, Leslie
March 2012
Proceedings of the International Conference on Waste Technology ;2012, p1210
Conference Proceeding
The paving industry in recent years has seen the emergence of a plethora of warm mix asphalt (WMA) technologies and application. With most states incorporating a recycled asphalt pavement (RAP) limit, it is necessary for WMA to not only serve as a greener technology but to work in conjunction with current RAP practices. The purpose of this study is to develop a methodology for quantifying the degree of blending that occurs in warm mix asphalt RAP mixtures at higher percentages of RAP. In addition to the methodology, the degree of blending will be determined for WMA and hot mix asphalt production temperatures as well as other varying pre-paving conditions like mixing time, conditioning time, and WMA type. Degree of blending proved to be sensitive to only the mixing time condition while not displaying any trends or significant differences in any other conditions.


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