Evaluation of Bio-Fog Sealants for Pavement Preservation

Pavement preservation is playing an increasingly significant role in maintaining aging pavement infrastructure. One important component is the application of sealants to the pavement surface. In a joint study between Minnesota Department of Transportation (MnDOT) and the University of Minnesota, the field performance and mechanical properties of asphalt mixtures from pavement sections treated with a number of new products, called bio sealants, is investigated. The objective of the study is to obtain relevant properties of treated asphalt materials to understand the mechanism by which sealants improve pavement performance. Laboratory testing was performed on treated asphalt binder and mixtures. For binders, a dynamic shear rheometer and a bending beam rheometer were used to obtain rheological properties of treated and untreated asphalt binders. Field cores from both untreated and treated sections were collected and thin beam specimens were prepared from the cores to compare the creep and strength properties of field-treated and laboratory-treated asphalt mixture. It is observed that the oil-based sealants have a significant softening effect on the control binder compared to the water-based sealants. For asphalt mixtures, different trends are observed for the field samples compared to the laboratory prepared samples. Similar to binder results, significant differences are observed between the asphalt mixtures treated with oil-based and water-based sealants, respectively. From the analysis performed on the bending creep and strength results at low temperature, it is concluded that the application of sealants in the field have no significant effect on these properties. Fourier transform infrared spectroscopy (FTIR) analysis showed that the sealant products could not be detected in mixture samples collected from the surface of the treated section.

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  • Corporate Authors:

    University of Minnesota, Twin Cities

    Department of Civil, Environmental, and Geo-Engineering
    500 Pillsbury Drive, SE
    Minneapolis, MN  United States  55455-0116

    Minnesota Department of Transportation

    Local Road Research Board, 408 Transportation Building
    St Paul, MN  United States  55155

    Minnesota Department of Transportation

    Research Services and Library
    395 John Ireland Boulevard
    St Paul, MN  United States  55155
  • Authors:
    • Ghosh, Debaroti
    • Turos, Mugur
    • Marasteanu, Mihai
  • Publication Date: 2016-6


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 86p

Subject/Index Terms

Filing Info

  • Accession Number: 01608680
  • Record Type: Publication
  • Report/Paper Numbers: MN/RC 2016-20, 2015011
  • Contract Numbers: (c) 99008 (wo) 148
  • Created Date: Aug 15 2016 2:50PM