Use of high-volume reclaimed asphalt pavement for asphalt pavement rehabilitation due to increasing highway truck traffic from freight transportation.
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2012-06-01
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Edition:Final report.
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Abstract:The objective of this research was to examine the effects that different methods of RAP stockpile fractionation had on
the volumetric mix design properties for high-RAP content surface mixes. The processing of RAP materials resulted in
the degradation of the aggregate structure of the original pavement. The increased presence of fine RAP materials in the
stockpile could be attributed to the amount of crushing done on the RAP millings. Fractionation methods were designed
to separate the stockpile at certain sizes to isolate the fine RAP materials which contained higher amounts of fine
aggregate and negatively impacted the volumetric properties of the mix design. These isolated RAP materials were used
in reduced proportions or completely eliminated, thereby decreasing the amount of fine aggregate material introduced
to the mix
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