Effect of Additives on Healing Performance of Moisture Damaged Hot Mix Asphalt by Using Microwave and Induction Heating

The objective of this study is to evaluate the effect of different additive agents on the healing performance of asphalt mixtures suffering from moisture damage. In addition, the moisture resistance due to additive agents was also examined by conducting Indirect Tensile Strength (ITS) test. A PG64-22 bitumen was modified with several additives, including 2 types of anti-stripping agent (ASA) and 2 types of rejuvenator. To improve the healing performance and accelerate temperature attainment, steel wool fibers (SWF) were introduced into the asphalt mixture for microwave and induction heating. All test specimens were further categorized into 4 different freeze-thaw (FT) cycles. The results indicated that mixing asphalt binder with additives improves the moisture resistance as well as the tensile strength of asphalt mixtures. A total of 8 damage-healing (DH) cycles were applied to all asphalt mixtures, examined by Three-Point Bending (TPB) test. It suggested that adding rejuvenator provides a better healing performance for all mixes. Optimum healing was observed at 2 to 3 damage-healing cycles for both healing treatments. Overall, asphalt mixtures modified with additive agents not only obtained higher moisture resistance but also gained better healing performance under repetitive FT cycles.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures.
  • Corporate Authors:

    Transportation Research Board

    ,    
  • Authors:
    • Phan, Tam Minh
    • Park, Dae-Wook
    • Le, Tri Ho Minh
    • Kim, Jun
    • Tam, Allistair Bliss Cabrera
  • Conference:
  • Date: 2019

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 5p

Subject/Index Terms

Filing Info

  • Accession Number: 01698433
  • Record Type: Publication
  • Report/Paper Numbers: 19-00287
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:38AM