PREDICTION OF RIGID-PAVEMENT PERFORMANCE FROM CUMULATIVE DEFLECTION HISTORY

Data from the AASHO Road Test were used to investigate a functional relationship between the cumulative deflections sustained by a rigid pavement and a quantitative measure of the corresponding condition of the pavement. Cumulative deflections were estimated from periodic Benkelman beam deflections. Deflections had been measured at approximate 2-week intervals during the road test, and we assumed in the analysis that such deflections were representative of those that would have been measured had Benkelman beam deflections been measured continually. The present serviceability index (PSI) was used as a quantitative measure of pavement condition. Because of wide variation in response to loading of similarly constructed test sections and even between replicate test sections, no definitive relationship could be established that could predict PSI as a function of cumulative deflection. However, when data from test sections having the same slab thickness were averaged, a PSI-cumulative deflection relationship could be described by two straight lines intersecting at a threshold cumulative deflection. For cumulative deflections less than the threshold, an increase in cumulative deflecton produced small changes in PSI; for cumulative deflection larger than the threshold, relatively small increases in cumulative deflection produced large changes in PSI. The level of the threshold cumulative deflection increased with increasing slab thickness. /Author/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1977/633/633-007.pdf
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=PREDICTION+OF+RIGID-PAVEMENT+PERFORMANCE+FROM+CUMULATIVE+DEFLECTION+HISTORY&author=W.+Highter&author=E.+Moore&publication_year=1977
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Pavement Condition Evaluation. 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:
  • Highter, William H
  • Moore, Edward L
• Publication Date: 1977

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 40-45
• Monograph Title: Pavement surface properties and performance
• Serial:
  • Transportation Research Record
  • Issue Number: 633
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Benkelman beam; Deflection; Forecasting; Loads; Measurement; Pavement performance; Pavements; Rigid pavements; Road tests; Serviceability; Thickness
• Uncontrolled Terms: Pavement thickness; Serviceability Index
• Old TRIS Terms: Pavement deflection
• Subject Areas: Design; Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00173179
• Record Type: Publication
• ISBN: 0309026598
• Report/Paper Numbers: HS-022 762
• Files: TRIS, TRB
• Created Date: May 3 2000 12:00AM