PAVEMENT EVALUATION BY USING DYNAMIC DEFLECTIONS

Dynamic test deflections were duplicated by elastic theory by using the Chevron N-layered computer program. Dynamic surface deflections obtained by using the road rater were used in conjunction with elastic theory to analyze pavement behavior. A procedure was developed to use field-measured road rater deflections for the estimation of the elastic modulus of the foundation material and the determination of the equivalent thicknesses of new material that approximate the behavior of the structure. The estimated moduli and the equivalent thicknesses can be used as inputs to design overlay thicknesses. An analysis of the deflections of the first three sensors of the road rater also makes it possible to distinguish weaknesses in asphalt concrete layers from weaknesses in the supporting foundation. /Author/

[1]  Gary L Hoffman,et al.  A PRACTICAL APPROACH TO FLEXIBLE PAVEMENT EVALUATION AND REHABILITATION , 1977 .

[2]  Jim W. Hall,et al.  Nondestructive Vibratory Testing of Airport Pavements. Volume 1. Experimental Test Results and Development of Evaluation Methodology and Procedure , 1975 .

[3]  L W Shepherd,et al.  DEFLECTION ANALYSIS OF FLEXIBLE PAVEMENTS , 1972 .

[4]  Robert C. Deen,et al.  TEMPERATURE DISTRIBUTION WITHIN ASPHALT PAVEMENTS AND ITS RELATIONSHIP TO PAVEMENT DEFLECTION , 1969 .

[5]  K Majidzadeh.  DYNAMIC DEFLECTION STUDY FOR PAVEMENT CONDITION INVESTIGATION , 1974 .

[6]  E. J. Yoder.  Principles of Pavement Design , 1959 .

[7]  James H. Havens,et al.  Kentucky Research: A Flexible Pavement Design and Management System , 1976 .

[8]  H. Saunders,et al.  Book Reviews : AN INTRODUCTION TO THE MECHANICS OF SOLIDS S. H. Crandall; N.C. Dahl; and T. J. Lardner McGraw-Hill Book Co. , New York, N. Y. (1972) , 1975 .

[9]  James H. Havens,et al.  STRUCTURAL ANALYSIS OF BITUMINOUS CONCRETE PAVEMENTS , 1972 .

[10]  James H. Havens,et al.  Resurfacing, Restoration, and Rehabilitation of Interstate Highways: Criteria and Logic Used to Determine January 3, 1977, Needs and Estimates of Costs , 1977 .

[11]  Chu-Kia Wang,et al.  Elementary theory of structures , 1957 .

[12]  G F Nielson,et al.  PREDICTING PERFORMANCE OF PAVEMENTS BY DEFLECTION MEASUREMENTS , 1969 .

[13]  E. Dill,et al.  An Introduction to the Mechanics of Solids , 1972 .

[14]  James H. Havens,et al.  Discussion of M.W. Witczak's A Comparison of Layered Theory Design Approaches to Observed Asphalt Airfield Pavement Performance , 1975 .

[15]  Yuan-yu Hsieh.  Elementary Theory of Structures , 1970 .

[16]  M W Witczak.  ASPHALT PAVEMENT PERFORMANCE AT BALTIMORE-WASHINGTON INTERNATIONAL AIRPORT , 1974 .

[17]  D. S. Dugdale,et al.  Introduction to the Mechanics of Solids , 1967 .

[18]  N K Vaswani.  DESIGN OF FLEXIBLE PAVEMENTS IN VIRGINIA USING AASHO ROAD TEST RESULTS , 1969 .

[19]  E. J. Yoder.  PRINCIPLES OF PAVEMENT DESIGN. SECOND EDITION , 1975 .