Strategies for Controlling and Suppressing Enrichment and Crystallization of Alkane Acids at the Bitumen-Aggregate Interface Using Mineral Microparticles and Nanoparticles

Controlling the composition and microstructure of the bitumen-aggregate interface is critical for promoting adhesion and moisture resistance of bitumen-aggregate mixtures such as asphalt pavement. Acid compounds are known to be detrimental for interfacial properties. Combined atomic force microscopy and infrared spectroscopy (AFM-IR) confirms that added alkane acids can accumulate at the bitumen-silica interface, likely having a direct impact on adhesion and wettability. Accumulation and crystallization of alkane acids at this interface can be mitigated by the addition of aluminosilicate microparticles and nanoparticles. The particles provide added surface area to draw acid compounds which may make them effective as additives for anti-stripping or moisture resistance.

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

    Transportation Research Board

    ,    
  • Authors:
    • Hung, Albert
    • Roy, Anirban
    • Fini, Ellie H
  • Conference:
  • Date: 2019

Language

  • English

Media Info

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

Subject/Index Terms

Filing Info

  • Accession Number: 01698450
  • Record Type: Publication
  • Report/Paper Numbers: 19-05689
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:24AM