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Title: NONDESTRUCTIVE EVALUATION OF COMPLEX MODULI IN ASPHALT CONCRETE WITH AN ENERGY APPROACH
Accession Number: 00780191
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: A modified version of the impulse-echo method is presented to nondestructively estimate the average Poisson's ratio and the average dynamic complex bulk, shear, extensional, and longitudinal moduli of asphalt concrete specimens made of different mixtures. The estimated moduli represent an average over the volume of the specimens and over the frequency band of 10 to 50 kHz. By using principles of statistical energy analyses, the proposed methodology is based on the energy-density decay function of a diffuse wave field. The methodology allows evaluation of the energy dissipation characteristics of different asphalt concrete mixtures and their dependence on material microstructure. As a consequence, energy-density decay functions may be used to search for an optimum asphalt concrete microstructure. In this study, it was observed that the typical Superpave mixture generally exhibits higher average dynamic energy storage capacity and higher energy decay rates (i.e., loss moduli).
Supplemental Notes: This paper appears in Transportation Research Record No. 1681, Hot-Mix Asphalt Mixtures.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: dos Reis, HLMHabboub, A KCarpenter, S HPagination: p. 170-178
Publication Date: 1999
Serial: ISBN: 0309071070
Features: Figures
(10)
; References
(39)
; Tables
(4)
TRT Terms: Uncontrolled Terms: Subject Areas: Energy; Highways; Materials; I31: Bituminous Binders and Materials
Files: TRIS, TRB, ATRI
Created Date: Dec 6 1999 12:00AM
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