PERFORMANCE OF FULL-DEPTH ASPHALT BASES ON SAN DIEGO COUNTY EXPERIMENTAL BASE PROJECT

The San Diego County experimental base project consists of 35 test sections designed to determine thickness requirements for five full-depth asphalt bases and two untreated granular bases. Testing was discontinued in 1973 after 7 years of traffic. This experiment was planned to determine specific thicknesses of various types of base courses required to give a desired level of performance, to relate certain measured properties of the pavement and pavement components to observed performance, and to study deflection and strain behavior of the test pavements to provide a better theoretical basis for translating future performance results to other environments. This paper is concerned with the first two objectives. Four full-depth asphalt bases were analyzed, and their relative thickness requirements were determined and related to pavement performance measured by a performance rating system and by the present serviceability index. Under test conditions and limitations of the analysis, it was possible to develop significant relationships between a panel rating of test section performance and the deflection and equivalent thickness for four full-depth asphalt base sections included in the experiment. The data did not yield significant relationships with either traffic of present serviceability index. Base weighting factors, relative to a high-quality asphalt concrete base, were developed from the analysis for asphalt cement, cutback asphalt, and emulsion-asphalt-treated bases by using a marginal quality sandy gravel aggregate.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1974/521/521-004.pdf
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=PERFORMANCE+OF+FULL-DEPTH+ASPHALT+BASES+ON+SAN+DIEGO+COUNTY+EXPERIMENTAL+BASE+PROJECT&author=J.+Shook&author=J.+Lambrechts&publication_year=1974
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Flexible Pavement Design. 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:
  • Shook, J F
  • Lambrechts, J R
• Conference:
  • 53rd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1974-1-21 to 1974-1-25
• Publication Date: 1974

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 47-59
• Monograph Title: Asphalt concrete pavement design and evaluation
• Serial:
  • Transportation Research Record
  • Issue Number: 521
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt cement; Bituminous aggregates; Deflection; Emulsified asphalt; Liquid asphalt; Pavement base course; Pavement performance; Pavements; Sandy gravels; Serviceability; Test sections; Thickness
• Uncontrolled Terms: Serviceability Index
• Geographic Terms: San Diego County (California)
• Old TRIS Terms: Pavement deflection
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 00095731
• Record Type: Publication
• ISBN: 0309023661
• Files: TRIS, TRB
• Created Date: Jul 2 1975 12:00AM