Superpave Gyratory Compactor with Shear Measurements as an Index Test for Instability Rutting Potential of Mixtures

It is widely recognized that a simple physical index test to evaluate rutting potential of asphalt mixtures is needed to verify results of volumetric designs. The ideal physical index test should allow testing during compaction to provide a history of responses under a range of air void conditions representative of the field. Various researchers have proposed methods of analysis of the compaction curve obtained from the Superpave gyratory compactor to evaluate the resistance to permanent deformation of asphalt mixtures. In this paper, the various proposed methods for relating gyratory resistance to rutting are reviewed briefly. Based on the review, a new set of gyratory compaction related parameters for evaluating the rutting potential of mixtures is proposed. Thirty-one different mixtures of known rutting performance are used to evaluate the new approach, including seven field mixtures. The results show that a fair correlation exists between the proposed index parameters, Asphalt Pavement Analyzer rut depths, and Superpave Indirect Tension (IDT) creep compliance results. In summary, the results presented in this paper provide the basis for the use of the Superpave gyratory compactor with shear measurements as a fast screening tool for the instability rutting potential of mixtures.

Language

  • English

Media Info

  • Media Type: Print
  • Pagination: pp. 317-332.
  • Monograph Title: Proceedings of the Forty-Eighth Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia, November 2003

Subject/Index Terms

Filing Info

  • Accession Number: 01604992
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD, TAC
  • Created Date: Jul 26 2016 5:02PM