Evaluating Balanced Mixture Design for New Jersey to Enhance Asphalt Mixture Durability

This paper summarizes an effort that evaluated a methodology for designing asphalt mixtures, called balanced mixture design (BMD). In this design method, the asphalt content is not determined through volumetric analysis. Optimum asphalt content, and recommended tolerances, are established by the rutting and fatigue cracking performance of the asphalt mixture, thereby “balancing” asphalt mixture performance. Volumetrics are not ignored, as they provide good guidance that has been historically verified. However, unlike the current Superpave asphalt mixture design, the volumetrics are used as a guide and not the final determining criteria. The results of the BMD demonstrated that for almost all mixtures evaluated, an increase in asphalt content was required over the current NJDOT approved mixture design. It is apparent that asphalt mixtures produced in New Jersey are under-asphalted based on the fatigue cracking requirements. Based on the information generated in this study, the mixtures are under-asphalted on average by 0.6%. Although this was a limited dataset, the general trend is still troubling but does mirror typical field observations. The BMD methodology was shown that it could be utilized to evaluate current state agency volumetric specifications and determine if current values need to be edited.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 60-76
  • Monograph Title: Innovations in Asphalt Mixture Design Procedures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01687984
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Nov 27 2018 10:51AM