Synthesis of Information Related to Highway Problems. Topic 38-06. Pre-Overlay Treatment of Existing Pavements

Billions of dollars will be spent on the American roadway infrastructure over the next decade. Federal and state highway agencies are shifting their emphasis from new construction to rehabilitation projects. Hot mix asphalt (HMA) overlays and, to lesser extent, Portland Cement Concrete (PCC) overlays are the most common rehabilitation methods. An overlay can immediately improve driving conditions, such as smoothness and safety. It is well recognized that the existing pavement should be repaired prior to the overlay and that the deterioration of overlay starts from distresses in existing pavements. However, there is not a systematic or consolidated document available to guide the highway agencies for determining cost-effective repairs. Even the AASHTO M-E Design Guide calls for engineering experience for pre-overlay repair. With the retirement of many agency engineers, a reliance professional judgment could result in inappropriate practices for pre-overlay repairs. There have been some studies related to pre-overlay repairs. These studies have been limited to some specific cases encountered by individual state highway agencies, such as Wisconsin, Texas, Illinois, California, Minnesota, and Ohio. In addition, NCHRP 20-50 has examined general pavement performance with two different pre-overlay repairs, based on Long-term Pavement Performance data. The findings of these miscellaneous studies have not been integrated into a systematic document. A synthesis of knowledge and practice would be greatly helpful to guide highway agencies in selecting pre-overlay repairs to obtain good overlay performance with limited funding. </font><br /><br /><font size="4"></font><br /><p> </p>


  • English


  • Status: Completed
  • Funding: $30000.00
  • Contract Numbers:

    Project 20-05, Topic

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Williams, Jon

  • Start Date: 20061001
  • Expected Completion Date: 0
  • Actual Completion Date: 20070101
  • Source Data: RiP Project 15992

Subject/Index Terms

Filing Info

  • Accession Number: 01464664
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 20-05, Topic
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:47PM