GEOGRID REINFORCEMENT OF ASPHALT PAVEMENTS AND VERIFICATION OF ELASTIC THEORY

The idea of reinforcing flexible pavements has existed for some years, and a few attempts have been made to use metallic and other materials. These have not been effective. Recently, however, a new, high-strength plastic geogrid material known as Tensar has become available; and pavement reinforcement has been suggested as one of its possible civil engineering applications. Consequently, the first phase of a research program initiated in early 1981 examined the potential of a variety of materials for pavement reinforcement, including geogrids. The conclusion was that these materials did indeed offer potential and should be further evaluated. A comprehensive experimental program of tests of reinforced and unreinforced pavements was carried out in the latter half of 1981 and early 1982. Descriptions are presented of the experimental and analytical program and the comparative results. The results of the unreinforced test sections were used to verify the basic elastic layer theory. The analysis shows that the theory provides a reliable tool to predict flexible pavement responses under the design load. A calibration factor that includes the effect of the dependence of elastic moduli on stress level was suggested; the results is a better agreement between predicted and measured values. The results show that the plastic geogrid used was effective as a reinforcement, in terms of carrying double the number of load repetitions or implying a substantial saving in asphalt thickness and minimizing fatigue cracking. (Author)

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1983/949/949-007.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=GEOGRID+REINFORCEMENT+OF+ASPHALT+PAVEMENTS+AND+VERIFICATION+OF+ELASTIC+THEORY&author=A.+Halim&author=R.+Haas&author=W.+Phang&publication_year=1983
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/636690782
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. Publication of this paper sponsored by Committee on Flexible Pavements.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Halim, A O Abd El
  • Haas, Ralph
  • Phang, William A
• Conference:
  • 62nd Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1983-1-17 to 1983-1-21
• Publication Date: 1983

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 55-65
• Monograph Title: PAVEMENTS: DESIGNS FOR HEAVY VEHICLES, COMPUTER SIMULATIONS AND GEOGRID REINFORCEMENTS
• Serial:
  • Transportation Research Record
  • Issue Number: 949
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt pavements; Calibration; Elasticity (Mechanics); Fatigue (Mechanics); Flexible pavements; Grids (Transmission lines); Pavement cracking; Pavements; Plastics; Reduction (Chemistry); Size; Thickness; Validation
• Uncontrolled Terms: Pavement thickness
• Old TRIS Terms: Elastic theory; Reduction
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00389562
• Record Type: Publication
• ISBN: 0309036704
• Files: TRIS, TRB
• Created Date: Nov 30 1988 12:00AM