A Synthesis of Technical Needs of Asphalt Pavements for Local Roads

Thursday, September 19, 2019 - 15:30

Under this investigation, researchers conducted a search for literature relevant to pavement design and asphalt mixture design of Low Volume Roads (LVRs). This investigation was complemented with a web-based survey submitted to state agencies and industry in an attempt to answer some questions that many practitioners may have related to the state-of-the-practice of LVR design. Researchers were able to identify challenges presented by the design of LVRs in order to provide some suggestions and opportunities for improvement of this process. One of these challenges is the existence of several methodologies of conducting asphalt mixture design and pavement design. Three mixture design approaches that consider traffic level as input parameters were briefly discussed. All three methodologies were selected because they contain mixture design criteria for low-volume applications. In terms of flexible pavement design, empirical approaches were found to be the most commonly used. These tend to be simple and require few inputs, but reliability is still an issue. In addition, the number of pavement design methodologies is significantly higher compared to mixture design, to the point that several states have adopted their own methodology. Several asphalt mix design and pavement design research studies focused on LVRs were included in this document.  The full report is available at http://eng.auburn.edu/research/centers/ncat/files/technical-reports/rep19-04.pdf

 


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