Investigation of the Significant Factors Affecting the Shear Bond Strength in the Field

The objective of this study was to investigate the effects of application rate, tack coat material type, and pavement surface type on shear bond strength at the interface. To achieve this objective, twenty-seven test sections in three field projects were constructed. Seven types of tack coat material including conventional tack coat, non-tracking emulsion tack coat, rapid curing cutback, and non-tracking polymer modified asphalt cement were applied at various application rates. The cores were collected from the field at different service times including after construction and after twelve months to investigate the effect of time on shear bond strength. The shear bond strength test was conducted by PINE shear test apparatus. The results indicated that the application rate is not a significant factor on shear bond strength after construction and twelve months service life. Regarding the surface type, the shear bond strength is significantly dependent on the surface type of the pavement. Also, in case of tack type, rapid curing cutback resulted in greater shear bond strength compared to trackless tack coat on a same surface type. This indicated that long-term curing influence is more noticeable for rapid curing cutback than a quick setting trackless tack coat. However, hot-applied trackless tack coat provides the greatest shear bond strength that is attributed to the high viscosity and stiffness of the asphalt cement. Finally, the service time had a noticeable influence on the shear bond strength of all tack types at all surface types.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFK40 Standing Committee on Surface Requirements of Asphalt Mixtures.
  • Corporate Authors:

    Transportation Research Board

  • Authors:
    • Banihashemrad, Amin
    • Sakhaeifar, Maryam
    • Wilson, Bryan
    • Seo, Ah Young
  • Conference:
  • Date: 2019


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 8p

Subject/Index Terms

Filing Info

  • Accession Number: 01698442
  • Record Type: Publication
  • Report/Paper Numbers: 19-05126
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:25AM