DYNAFLECT EVALUATION OF LAYER MODULI IN FLORIDA'S FLEXIBLE PAVEMENT SYSTEMS

Research conducted to investigate the nondestructive testing (NDT) characterization of in-place pavement materials has resulted in the development of a modified sensor spacing for the Dynaflect. The modified testing configuration provides the capability to separate the deflection response contributed by the subgrade, the stabilized subgrade, and the combination of base and asphalt concrete for typical Florida flexible pavement systems. Analysis of Dynaflect data for in-service pavements using an elastic layer computer program resulted in the development of simple power law regression equations to predict layer moduli from modified sensor deflections. This paper presents the development of the simplified layer moduli prediction equations, and the recommended testing and analytical procedures for pavement evaluation investigations. The use of this simplified approach allows a large number of test locations to be analyzed by eliminating the use of computer-iterative programs which are usually time consuming, expensive, and often subject to substantial errors.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1988/1196/1196-010.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=DYNAFLECT+EVALUATION+OF+LAYER+MODULI+IN+FLORIDA%27S+FLEXIBLE+PAVEMENT+SYSTEMS&author=K.+Badu-Tweneboah&author=B.+Ruth&author=W.+Miley&publication_year=1988
• Availability:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1196, Pavement Evaluation and 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:
  • Badu-Tweneboah, Kwasi
  • Ruth, Byron E
  • Miley, William G
• Publication Date: 1988

Media Info

• Features: Figures; Tables;
• Pagination: p. 96-107
• Monograph Title: Pavement evaluation and rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 1196
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Coefficient of subgrade reaction; Deflection; Dynaflect; Equations; Evaluation; Flexible pavements; Forecasting; Modulus of elasticity; Nondestructive tests; Pavement layers; Pavement performance; Pavements; Regression analysis; Sensors; Spacing; Test procedures
• Old TRIS Terms: Pavement deflection
• Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00490150
• Record Type: Publication
• ISBN: 0309047714
• Files: TRIS, TRB, ATRI
• Created Date: Dec 31 1989 12:00AM