Laboratory Evaluation of Asphalt Mixtures Containing Dry Added Ground Tire Rubber and a Processing Aid

Commonly used to modify asphalt binder for use in hot-mix asphalt construction, ground tire rubber (GTR) is the focus of this study. For use as co-modifiers with GTR in asphalt binder modification for asphalt pavement construction, various additives have been recommended. Co-modifiers have been promoted more recently to be incorporated into hot-mix asphalt through dry addition into asphalt mixtures of GTR and additive. An improved modified asphalt paving binder is represented by these additives to be provided by incorporating a small amount of additive into GTR modified asphalt binder. This, in turn, leads to easier mixing, reduced cracking, reduced tackiness, lower life-cycle cost, longer service life, and less permanent deformation. The results of a comprehensive evaluation of trans-polyoctenamer (TOR) modified binder incorporated with GTR in modification of asphalt binder are reported in this paper. Evaluated in dense, open graded friction course (OGFC), and stone matrix asphalt (SMA) mixtures were four binders, as follows: GTR wet pre-blended; GTR dry added to mixture; performance grade (PG) 67-22; and Styrene-Butadiene-Styrene block copolymer (SBS).

Language

  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 507-539
  • Monograph Title: Asphalt Paving Technology 2012
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01523153
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 10 2014 12:54PM