High Reclaimed Asphalt Pavement (RAP) Asphalt Mixes for Low Volume Roads [Summary]

2019Research SummaryPDFBriefFDOT-BE194-SUMBE194Asphalt mixturesDurabilityLow volume roadsPavement designPavement performanceReclaimed asphalt pavementsDesignHighwaysMaterialsPavementsFloridaUnited StatesFlorida. Dept. of TransportationArambula-Mercado, EdithTexas A&M Transportation InstituteFlorida. Dept. of TransportationMoseley, HowieUS Transportation CollectionRoad maintenance and rehabilitation activities by the Florida Department of Transportation (FDOT) generate about 1.8 million tons of reclaimed asphalt pavement (RAP) every year. Disposing of this material safely and productively is a continuing challenge. FDOT already uses RAP in some resurfacing projects, based on the results of previous research projects. Higher percentages of RAP are not appropriate for high volume, high speed roads, but lower volume roads could be paved with mixtures containing higher amounts of RAP. Researchers at the Texas A&M Transportation Institute developed mix design guidelines for mixtures with RAP content greater than 60% for use on off-system, low volume roads (average daily traffic < 750 vehicles).73