Assessing Techniques and Performance of Thin OGFC/PEM Overlay on Micro-Milled Surface

The practice of placing an open-graded friction course (OGFC) or a porous European mix (PEM) directly on top of a conventional milled surface has rarely been done in Georgia due to concerns that this rehabilitation method could potentially cause delamination of the surface layer due to poor bonding between the OGFC/PEM layer and the conventional milled surface. This report presents the research study for evaluating the quality of two micro-milling operations (one on I-75 and one on I-95) designed to reduce the potential for these issues. Results obtained from the I-75 project indicated that based on four years of satisfactory performance of the PEM overlay the use of a 95-percentile ridge-to-valley texture depth (RVD) parameter as the threshold value for compliance with the correction 3.2 mm RVD acceptance requirement could be too restrictive. Alternatively, Mean RVD was tentatively adopted on the I-95 project for compliance with the correction 3.2 mm RVD acceptance criteria. The research team concluded that the ultimate decision for selecting an appropriate RVD parameter for compliance with the correction 3.2 mm RVD acceptance requirement should be based on the long-term performance of the OGFC/PEM layer placed on the micro-milled surface.

• Record URL:
  http://g92018.eos-intl.net/eLibSQL14_G92018_Documents/07-07.pdf
• 
• Corporate Authors:

  Georgia Institute of Technology, Atlanta

  School of Civil and Environmental Engineering
  Atlanta, GA  United States  30332

  Georgia Department of Transportation

  Office of Materials and Research, 15 Kennedy Drive
  Forest Park, GA  United States  30297-2534

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Lai, James
• Publication Date: 2014-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Photos; References; Tables;
• Pagination: 182p

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Evaluation and assessment; Friction course; Milling; Overlays (Pavements); Pavement maintenance; Pavement performance; Texture
• Geographic Terms: Georgia
• Subject Areas: Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 01610831
• Record Type: Publication
• Report/Paper Numbers: FHWA-GA-11-0707, 07-07
• Contract Numbers: SPR00-0008-00-516
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Sep 21 2016 2:40PM