Optimization of Patching for Spray Injection Equipment

Pothole repair, often referred to as patching, is a costly and time consuming practice for localities, departments of transportation and highway agencies. These repairs are performed throughout the year, particularly during the winter months when the temperature drops below freezing with intermittent periods of thawing. Since hot mix asphalt plants are shut down during the winter, cold mix asphalt, which contains an emulsified or cutback asphalt, mixed with fine aggregates, is commonly used for these patches. Patching using the spray injection method can be used to overcome the reduced adhesion between the patching material and the existing pavement. This method utilizes heated emulsion and virgin aggregate that are sprayed into the pothole. The mix of virgin aggregate and heated emulsion can be varied depending on the size and location of the pothole. However, the selection of the aggregate and emulsion combination as well as the optimum spray rate of the emulsion are critical to ensure the longevity of the patches. This research will provide a comprehensive examination to determine the cost-effectiveness, benefits and limitations of the spray injection, identify proper procedures for use, identify different aggregate and emulsion materials for use, and provide specifications for use and storage. If proven successful, the spray injection method could result in a longer lasting pothole patch which improves the safety of the traveling public, and reduces costs associated with duplicate repairs of a pothole.


  • English


  • Status: Completed
  • Funding: $191776
  • Contract Numbers:



  • Sponsor Organizations:

    University of Akron

    Akron, OH  United States 
  • Project Managers:

    Warner , Jill

  • Principal Investigators:

    Abbas, Ala

  • Start Date: 20130930
  • Expected Completion Date: 20160330
  • Actual Completion Date: 20160330

Subject/Index Terms

Filing Info

  • Accession Number: 01595711
  • Record Type: Research project
  • Source Agency: Ohio Department of Transportation
  • Contract Numbers: 134841, 26056
  • Files: RIP, STATEDOT
  • Created Date: Apr 4 2016 2:56PM