Use of J-Band to Improve the Performance of the HMA Longitudinal Joint

The density and air void content of asphalt mixtures affect the durability and performance of asphalt pavements. Pavement longitudinal joints typically have a lower density than the mat because they receive less compaction than the center section of the mat for various reasons. The higher air void percentages resulting from lower densities can lead to high permeability and allow water infiltration, which in turn can cause moisture-induced damage and decrease base and subbase support to the pavement, reducing pavement life. Void-reducing asphalt membrane (VRAM) has been used at the longitudinal joints of asphalt pavements to achieve higher densities and prevent moisture infiltration, thereby reducing deterioration at the longitudinal joints. VRAM is applied before the hot-mix asphalt (HMA) layer is placed and migrates into the HMA to fill 50% to 70% of the air voids. This research evaluated the extent to which J-Band, a VRAM product, increases density and improves performance. Field cores were collected from two sections, one with and one without VRAM. Asphalt mixture performance tests, including disk compact tension and semi-circular bend tests, and push-pull tests were carried out in the laboratory on the field-collected specimens. Volumetric measurements were also taken, and ground penetrating radar was used in the field. It was determined that the pavement sections with VRAM had a lower permeability, higher bond energy, and higher fracture energy than the pavement sections without VRAM.

  • Record URL:
  • Corporate Authors:

    Iowa State University, Ames

    Institute for Transportation
    2711 South Loop Drive, Suite 4700
    Ames, IA  United States  50010-8664

    Minnesota Department of Transportation

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


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Maps; Photos; References; Tables;
  • Pagination: 61p

Subject/Index Terms

Filing Info

  • Accession Number: 01762809
  • Record Type: Publication
  • Report/Paper Numbers: MN 2020-33
  • Contract Numbers: 1003320 (wo) 6
  • Created Date: Dec 24 2020 11:47AM