Enhancing the Fundamental Knowledge and Use of Asphalt Emulsions Using Systematic Scientific and Engineering Approaches

Due to their lower application temperature, lower energy consumption, and lower viscosity, asphalt emulsions are gaining popularity in the United States and worldwide. About 3 million tons of asphalt emulsion are produced in the US, which accounts for 5% to 10% of the total asphalt consumption. However, there is still a lack of understanding of the mechanisms by which asphalt emulsions are produced and how they work. This research project reviews current literature available on asphalt emulsions to determine the present state of the practice, documents the development of an asphalt laboratory at Iowa State University, reports asphalt emulsion results, and creates an action plan for future work. Two standard emulsions, one non-modified and one polymer-modified, were produced in the laboratory using a state-of-the-art laboratory-scale asphalt emulsion mill, emulsion properties were compared and experience was gained. To determine standards by which to compare emulsions to the performance grade (PG) system of binder classification, master curves of elastic modulus (G*) were plotted between emulsion residue and their base binders. The elastic recovery of polymer-modified asphalt emulsion residue was also tested to compare its performance with polymer-modified binders. Finally, sweep tests were conducted on laboratory-prepared chip seal samples to compare the aggregate mass lost between samples prepared with asphalt emulsion and hot applied asphalt.

Language

  • English

Project

  • Status: Completed
  • Funding: $45000
  • Contract Numbers:

    DTRT13-G-UTC37

  • Sponsor Organizations:

    Midwest Transportation Center

    Iowa State University
    2711 S Loop Drive, Suite 4700
    Ames, IA  United States  50010-8664

    Iowa Highway Research Board

    Iowa Department of Transportation
    800 Lincoln Way
    Ames, IA  United States  50010

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    Midwest Transportation Center

    Iowa State University
    2711 S Loop Drive, Suite 4700
    Ames, IA  United States  50010-8664
  • Performing Organizations:

    Iowa State University, Ames

    Institute for Transportation
    2711 South Loop Drive, Suite 4700
    Ames, Iowa  United States  50010-8664
  • Principal Investigators:

    Buss, Ashley

  • Start Date: 20170301
  • Expected Completion Date: 20180228
  • Actual Completion Date: 20180731

Subject/Index Terms

Filing Info

  • Accession Number: 01632704
  • Record Type: Research project
  • Source Agency: Midwest Transportation Center
  • Contract Numbers: DTRT13-G-UTC37
  • Files: UTC, RiP
  • Created Date: Apr 26 2017 1:28PM