Evaluation of the Performance of High-SBS Modified Asphalt Binder Through Accelerated Pavement Testing

A full-scale experiment was conducted at the Florida Department of Transportation's (FDOT’s) Accelerated Pavement Testing (APT) facility to evaluate the performance of a newly formulated asphalt binder, namely high styrene–butadiene–styrene (SBS) modified asphalt (HSMA) binder. Test sections were constructed using three dense-graded Superpave asphalt mixtures consisting of the same aggregate components and gradation. One mixture included a polymer-modified asphalt (PMA) binder meeting PG 76-22 requirements, another contained HSMA binder at the same effective binder content, and the third one also used HSMA binder but at an additional 0.5% binder content. The subsequent accelerated testing showed that, under similarly controlled conditions, test sections using HSMA binder exhibited better rutting and fatigue cracking performance than those with PG 76-22 PMA binder. The 0.5% additional HSMA binder content resulted in negligible added performance compared to the sections using HSMA binder at the design content. Furthermore, supplementary laboratory tests including dynamic shear rheometer (DSR), multiple stress creep recovery (MSCR), softening point, and indirect tensile (IDT) strength confirmed the improved properties of the HSMA binder and HSMA mixtures.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFK20 Standing Committee on Asphalt Binders.
  • Corporate Authors:

    Transportation Research Board

    ,    
  • Authors:
    • Kwon, Ohhoon
    • Choubane, Bouzid
    • Greene, James
    • Sholar, Gregory
  • Conference:
  • Date: 2019

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 6p

Subject/Index Terms

Filing Info

  • Accession Number: 01698419
  • Record Type: Publication
  • Report/Paper Numbers: 19-00585
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:22AM