Application of a Biomodifier as a Fog Sealant to Delay Asphalt Ultraviolet Aging

This study examines merits of applying a bio-modifier as a fog sealant on bituminous materials surface to delay aging specifically caused by ultraviolet (UV) radiation during pavement service life. In this study four type of bituminous based materials including an asphalt binder (PG 64-22) and three types of crack sealants (with varying polymer content) are used. Materials are prepared in small samples on aluminum plates and are aged under continuous UV exposure and UV/Moisture/Condensation exposure. The changes in the chemical characteristics of the materials are then analyzed using Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy. The complex moduli of samples are measured using a dynamic shear rheometer. The results show that the amount of oxygen in asphalt decreased after covering with bio-modifier in both the binder and the sealants. The complex moduli for binder samples shows an increase that could be due to the presence of fog sealant in the specimens. However, in sealant samples where the bio-modifier has been removed prior to running the test, the shear moduli show a decrease, indicating that the materials covered with Bio-binder have stayed softer than the materials not covered with it. Overall, the findings prove that Bio-binder has the potential to be used in the asphalt industry as a fog sealant.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AHD18 Standing Committee on Pavement Preservation.
  • Authors:
    • Zadshir, Mehdi
    • Hosseinnezhad, Shahrzad
    • Ortega, Ruben
    • Chen, Fiangliang
    • Hochstein, Daniel
    • Xie, Jeff
    • Yin, Huiming
    • Parast, Mahour
    • Fini, Elham H
  • Conference:
  • Date: 2018

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 4p

Subject/Index Terms

Filing Info

  • Accession Number: 01657910
  • Record Type: Publication
  • Report/Paper Numbers: 18-05825
  • Files: TRIS, TRB, ATRI
  • Created Date: Jan 25 2018 9:33AM