STRUCTURAL OVERLAYS FOR PAVEMENT REHABILITATION

Research in California on the use of deflection measurements for asphalt concrete overlay design resulted in a revision to the California overlay design method presented at the Western Summer Meeting of the Highway Research Board in August 1970. Deflection reduction characteristics and tolerable deflection levels of asphalt concrete were revised based on the performance of highway projects under study since 1960. A higher initial deflection level will result in a slightly greater percentage of reduction for a given overlay thickness. An evaluation of the design method compares predicted versus measured deflections on 69 reconstructed highways. The deflection level after reconstruction can be predicted within plus or minus 0.008 in. (plus or minus 0.2 mm) with a 95 percent confidence limit by using the deflection reduction guide. Pavement deflections are measured by using the California traveling deflectometer, which provides a dynamic type of measurement while traveling along the roadway at 1/2 mph (0.8 km/h). An asphalt concrete overlay design guide was developed that simplifies the procedure for determining overlay thicknesses, but other factors such as the condition of the structural section and reflection cracking potential may alter the design. Since 1960, the overlay method has been used on approximately 450 different roadways. /Author/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/572/572-003.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=STRUCTURAL+OVERLAYS+FOR+PAVEMENT+REHABILITATION&author=R.+Bushey&author=K.+Baumeister&author=J.+Matthews&publication_year=1976
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309024854
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Design of Composite Pavements and Structural Overlays. 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.
• Authors:
  • Bushey, Roy W
  • Baumeister, Karl L
  • Matthews, James A
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 29-37
• Monograph Title: Pavement Design, Performance, and Rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 572
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt concrete; Deflection; Disasters; Driver rehabilitation; Forecasting; Measurement; Measuring instruments; Pavement design; Pavement overlays; Pavement performance; Pavements; Reflection cracking; Thickness
• Uncontrolled Terms: Rehabilitation
• Old TRIS Terms: Pavement deflection
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00139560
• Record Type: Publication
• ISBN: 0309024854
• Files: TRIS, TRB
• Created Date: Sep 16 1976 12:00AM