Interaction of Warm Mix Asphalt (WMA) Technologies and High-Reclaimed Asphalt Pavement (RAP) in Asphaltic Mixes

Several studies have been conducted on RAP-containing WMA mixes. However, the behavior of high-RAP mixes is not fully understood. This paper aims to advance the knowledge on the interaction of WMA technologies and high-RAP mixes. This is done through the study of the effect of the RAP content, RAP source, WMA additive type, mixing and compaction temperatures, and mixture conditioning duration on the compactability and mechanical stability of high-RAP WMA mixes. A fractional factorial design was used to produce 16 combination of mixes incorporating the mentioned factors. Analysis was made using indices derived from the densification curves of the mixes. The results show that lowered production temperatures, RAP source, and RAP content significantly affect workability and stability high-RAP WMA mixes. Also, incorporation of high RAP contents can be achieved without reducing workability or stability of the mixes, if production temperatures are kept at Hot Mix Asphalt (HMA) levels. WMA additive type exhibit no statistically significant effect on the workability of the studies mixes.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures.
  • Authors:
    • Alsalihi, Mohammed
    • Faheem, Ahmed
  • Conference:
  • Date: 2018


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 18p

Subject/Index Terms

Filing Info

  • Accession Number: 01663687
  • Record Type: Publication
  • Report/Paper Numbers: 18-06084
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 22 2018 11:57AM