Ranking rutting performance of bituminous binders in asphalt specimens using linear viscoelastic properties

Permanent deformation has conventionally been described by the viscosity-temperature relationship of bitumen at the high in-service pavement temperatures. However, the increase in traffic loads and widespread usage of polymer modified binders (PMBs) has necessitated more accurate predictions of bitumen creep performance. The US Strategic Highway Research Programme (SHRP) attempted to improve rutting predictions through the introduction of a rutting parameter. An overview of the SHRP rutting parameter is presented in this paper and improved creep predictions based on Anderson’s and Shenoy’s equations as well as the dissipated to stored energy ratio are considered. The aforementioned Linear Visco-Elastic (LVE) relations are calculated from frequency sweep data measured with a dynamic shear rheometer (DSR) and used to rank six bitumens in terms of creep performance. These LVE relations are then compared to the non-recoverable creep compliance parameter, Jnr, in predicting the ranking of laboratory tested hot mix asphalt (HMA) specimens in terms of rutting resistance.

Language

  • English

Media Info

  • Pagination: 8p
  • Monograph Title: 11th Conference on Asphalt Pavements for Southern Africa: CAPSA15, 16-19 August 2015, Sun City, South Africa

Subject/Index Terms

Filing Info

  • Accession Number: 01597107
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Apr 22 2016 11:14AM