Is Seal Coating Counterproductive or Not?

While seal coating has been widely used as a cost-effective strategy in asphalt pavement preservation by Minnesota Department of Transportation and local agencies with great success, some cities and counties in Minnesota have reported their concerns about the premature stripping of street pavements that have been seal coated. The objective of this study was to diagnosis whether seal coating was counterproductive in asphalt pavement preservation. In this study, the research team investigated the mechanisms accountable for asphalt pavement stripping under seal coats and provided recommendations. Comprehensive field and laboratory data collection was conducted to diagnose premature stripping. Some possible causes of stripping were proposed after preliminary diagnoses. For example, one proposed cause was that due to the weak bond strength of the asphalt pavement, the underlying seal coating could be prone to premature stripping under high-moisture and multiple freeze-thaw conditions. Corresponding laboratory testing was then conducted. Based on the research conducted in this study, it cannot be simply concluded that seal coating is counterproductive.

  • Record URL:
  • Corporate Authors:

    Local Road Research Board

    395 John Ireland Boulevard
    St. Paul, Minnesota  United States  55155-1899

    Michigan Technological University

    Department of Civil and Environmental Engineering
    1400 Townsend Drive
    Houghton, MI  United States  49931

    Minnesota Department of Transportation

    Office of Research & Innovation
    395 John Ireland Boulevard, MS 330
    St. Paul, MN  United States  55155-1899
  • Authors:
  • Publication Date: 2020-12


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 97p

Subject/Index Terms

Filing Info

  • Accession Number: 01765569
  • Record Type: Publication
  • Report/Paper Numbers: MN 2020-34
  • Contract Numbers: 1003321 (wo) 1
  • Created Date: Feb 8 2021 4:02PM