Tests of HMA overlays using geosynthetics to reduce reflection cracking.

Details

• Alternative Title:
  Tests of hot mix asphalt overlays using geosynthetics to reduce reflection cracking
• Creators:
  Chowdhury, Arif ; Button, Joe W. ; Lytton, Robert L.
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office
• Subject/TRT Terms:
  • Pavement cracking
  • Overlays (Pavements)
  • Hot mix asphalt
  • Pavements--Texas--Overlays--Testing
  • Geosynthetics--Texas--Testing
  • Pavements, Asphalt--Cracking--Texas--Prevention
• Publication/ Report Number:
  FHWA/TX-10/0-1777-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Sept. 1999-Aug. 2007.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  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 ; A marillo test pavement (flexible in harsh climate).
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• Format:
  PDF
• Funding:
  0-1777
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17632/dot_17632_DS1.pdf
• File Type:
  [PDF - 4.93 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7403bfd9989059063c457e455b86c9bf76ba1752b39e4ec894aa3adfed58e2f1