PAVEMENT ELASTIC CHARACTERISTICS MEASURED BY MEANS OF TESTS CONDUCTED WITH THE FALLING WEIGHT DEFLECTOMETER

In this paper a procedure is described that obtains the elastic moduli of both flexible and semi-rigid pavements from tests carried out with a falling weight deflectometer (FWD). The pavements are schematized as an elastic four-layer body. For bituminous and hydraulic-bound layers, a linear elastic law was adopted, whereas a nonlinear elastic law was used for unbound layers (subbase and subgrade). The behavior of a large number of pavements subjected to the FWD load was analyzed by using a finite-element model. A wide range of layer thicknesses and moduli were included in the pavement sections tested. From this analysis and by using the multiple regression technique, it was possible to determine analytical functions between deflections and moduli. The procedure allows an evaluation of the moduli of the different pavement layers by using these functions and the deflections measured under the FWD load. An example of a practical application of this procedure to the elastic characteristics of semi-rigid pavements of some Italian motorways is presented in the paper.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1985/1007/1007-006.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=PAVEMENT+ELASTIC+CHARACTERISTICS+MEASURED+BY+MEANS+OF+TESTS+CONDUCTED+WITH+THE+FALLING+WEIGHT+DEFLECTOMETER&author=A.+MARCHIONNA&author=M.+Cesarini&author=M.+Fornaci&author=M.+MALGARINI&publication_year=1985
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Pavement Rehabilitation. 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:
  • Marchionna, Aurelio
  • Cesarini, Maurizio
  • Fornaci, Massimo G
  • Malgarini, Mauro
• Publication Date: 1985

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 46-53
• Monograph Title: Nondestructive pavement evaluation and overlay design
• Serial:
  • Transportation Research Record
  • Issue Number: 1007
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Deflection; Falling weight deflectometers; Finite element method; Modulus of elasticity; Multiple regression analysis; Pavements
• Old TRIS Terms: Multiple regression; Pavement deflection
• Subject Areas: Geotechnology; Highways; Pavements; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00452643
• Record Type: Publication
• ISBN: 0309038170
• Files: TRIS, TRB
• Created Date: Aug 27 2004 9:59PM