Evaluation of a Rubber-Modified Mixture in Alabama

Some state agencies and contractors are investigating rubber-modified asphalt mixtures as a substitute for using polymers such as styrene-butadiene-styrene (SBS) in asphalt mixtures. If rubber-modified mixtures can perform equivalently to polymer-modified mixtures, state agencies and contractors will have additional tools for achieving the desired asphalt mixture properties needed to withstand pavement distresses. The objectives of this research were twofold. First, a laboratory testing plan was developed to predict the field performance of the mixtures. Secondly, the research team monitored the field performance of a rubber-modified asphalt mixture in Alabama for a period of five years to determine if the mixture was durable in field conditions. In addition, a laboratory testing plan was developed to validate the mixture's field performance. To complete these objectives, the production and construction of a rubber-modified asphalt mixture and control polymer-modified asphalt mixture were monitored in August 2010. In addition to monitoring the construction of the project, each mixture and binder was sampled at the plant and taken to the National Center for Asphalt Technology (NCAT) laboratories for mixture and binder characterization. NCAT would return to the site yearly to assess the field performance of the mixtures in terms of cracking, rutting, texture, and ride quality.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Interim Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 43p

Subject/Index Terms

Filing Info

  • Accession Number: 01529343
  • Record Type: Publication
  • Report/Paper Numbers: 14-03
  • Created Date: Jun 24 2014 10:22AM