Tests of HMA Overlays Using Geosynthetics to Reduce Reflection Cracking

The primary objective of this field phase of the research project was to evaluate geosynthetic products placed under or within hot mix asphalt overlays to reduce the severity or delay the appearance of reflection cracks and to calibrate and validate FPS-19 Design Check. Multiple end-to-end test pavements incorporating geosynthetic products (fabrics, grids, and composites) and including control sections were constructed in three different regions of Texas (Amarillo, Waco, and Pharr Districts) with widely different climates and geological characteristics. Performance of these test pavements has been monitored for five to six years, depending on the date of construction. The oldest test pavements (Pharr) are exhibiting essentially no cracking. The Amarillo and Waco test pavements are exhibiting a fair amount of low severity and a very small amount of medium-severity reflective cracking. Based on measured cracks in the original pavement before overlaying, the percentage of reflective cracking in each test section was calculated and plotted with time of pavement in service. Calibration of FPS-19 Design Check could not be accomplished due to the absence of sufficient amount of cracks with medium-severity level. Instead, using the field data, relative life ratio of test sections was projected. Field specimens obtained from these test pavements were tested using the large overlay tester. Field monitoring revealed that some geosynthetic products are effective in delaying reflective cracking. They were relatively more effective in the Waco test pavement (concrete in mild climate) than the Amarillo test pavement (flexible in harsh climate).

  • Record URL:
  • Supplemental Notes:
    • Project Title: Field Synthesis of Geotextiles in Flexible and Rigid Pavement Rehabilitation Strategies Including Cost Consideration. Report Date: February 2009; Published: December 2009.
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 3135 TAMU
    College Station, TX  United States  77843-3135

    Texas Department of Transportation

    Research and Technology Implementation Office, P.O. Box 5080
    Austin, TX  United States  78763-5080

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Chowdhury, Arif
    • Button, Joe W
    • Lytton, Robert L.
  • Publication Date: 2009-12

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Technical Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 100p

Subject/Index Terms

Filing Info

  • Accession Number: 01154197
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-10/0-1777-3, Report 0-1777-3
  • Contract Numbers: Project 0-1777
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 8 2010 11:44AM