MOISTURE SENSITIVITY IN ASPHALT CONCRETE MIXTURES. FINAL REPORT

The research performed for this report was intended to recommend alternative mix design procedures and parameters for evaluation of asphalt mixture sensitivity, with more of an emphasis on volumetric relationships. Three Minnesota Department of Transportation (Mn/DOT) projects were selected to represent the following durability issues: 1) debonding of asphalt form aggregate, 2) cohesion problems, and 3) mix design problems. Materials were obtained from these construction projects and evaluated in the laboratory. Gradations were varied from the project specifications so that mixtures with more and less asphalt were evaluated along with the project mixture. Testing included the temperature susceptibility and moisture sensitivity of the mixtures, in addition to the net adsorption test on the aggregates. The results suggested means for identifying moisture sensitivity mechanisms in mixtures during the mixture design phase, although these need to be confirmed through more extensive investigation. Aggregate mineralogy, gradation, and mixture proportioning can all play a role in improving the durability characteristics of asphalt mixtures. Recommendations are made for continued research and implementation of an improved approach to asphalt mixture design.

  • Corporate Authors:

    University of Minnesota, Twin Cities

    Department of Civil Engineering, 500 Pillsbury Drive, SE
    Minneapolis, MN  United States  55455

    Minnesota Department of Transportation

    Office of Materials, 1400 Gervais Avenue
    Maplewood, MN  United States  55109
  • Authors:
    • Stroup-Gardiner, Mary
    • Newcomb, D E
    • Crow, B
    • Kussman, W
    • Wegman, D
  • Publication Date: 1995-11

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 65 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00720168
  • Record Type: Publication
  • Report/Paper Numbers: MN/RC-96/04
  • Contract Numbers: 72275 TOC #149
  • Files: TRIS, STATEDOT
  • Created Date: Apr 15 1996 12:00AM