APPLICATION OF SIMPLIFIED LAYERED SYSTEMS TO NDT PAVEMENT EVALUATION

Presented are nondestructive testing (NDT) deflection measurements on flexible, rigid, and composite pavements obtained with two vibratory devices, the Pavement Profiler and the WES 16-kip vibrator, and one impulse loading device, the falling weight deflectometer (FWD). The deflection bowls are analyzed in terms of the elastic parameters of layers using the Hogg, the Burmister, and the Odemark-Ullidtz approximation to linear layered elastic system models. The results are compared with those obtained using more exact solutions and are found to be satisfactory. The evaluated elastic parameters were found to be similar for all three NDT devices for the subgrade and the surface layers of the pavement. Lower elastic moduli were found for the base course with deflection bowls produced by the FWD than for those produced by the other two vibratory devices. Most pavement evaluation is done on pavements that have been in service for many years and have a varied history of maintenance and overlaying. The resulting lack of homogeneity must be considered in developing a strategy for pavement evaluation. It is therefore necessary to examine a large number of test points. The use of simplified layered system models for NDT pavement evaluation is, therefore, recommended. This makes it economically feasible to analyze each test point with respect to the relative contribution of the strength of the subgrade and the condition of the pavement structure to the overall performance of the pavement. It is also possible to examine material variability for each of the layers. Results of such computations given in this paper show higher variability in the asphaltic concrete and the base course layers than in the concrete or the subgrade.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1985/1022/1022-004.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=APPLICATION+OF+SIMPLIFIED+LAYERED+SYSTEMS+TO+NDT+PAVEMENT+EVALUATION&author=G.+WISEMAN&author=J.+GREENSTEIN&author=J.+Uzan&publication_year=1985
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Mechanics of Earth Masses and Layered Systems. 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:
  • Wiseman, Gdalyah
  • Greenstein, Jacob
  • Uzan, Jacob
• Publication Date: 1985

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 29-36
• Monograph Title: Analysis and testing of granular bases and subbases
• Serial:
  • Transportation Research Record
  • Issue Number: 1022
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accuracy; Alternatives analysis; Deflection; Evaluation; Modulus of elasticity; Nondestructive tests; Pavement performance; Pavement subgrade; Pavements; Strength of materials; Test procedures; Vibration tests
• Old TRIS Terms: Layered system mechanics; Pavement deflection; Vibrational testing
• Subject Areas: Geotechnology; Highways; Pavements; I42: Soil Mechanics;

Filing Info

• Accession Number: 00457444
• Record Type: Publication
• ISBN: 0309039118
• Files: TRIS, TRB
• Created Date: Aug 31 1986 12:00AM