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Title: APPLICATION OF DIGITAL IMAGE PROCESSING TO QUANTITATIVE STUDY OF ASPHALT CONCRETE MICROSTRUCTURE
Accession Number: 00714833
Record Type: Component
Availability: Find a library where document is available Abstract: Asphalt concrete (AC) is a strongly heterogeneous material that consists of asphalt cement, voids, fine particles, sand, and coarse aggregates. A review of the literature reveals that the investigations of AC have mainly concentrated on the macroscopic behavior of the material based on the assumption that the mixture is homogeneous. This assumption is mainly due to the extreme difficulty associated with the quantitative measurements of AC microstructure and the random nature of the aggregate distribution. This paper applies an innovative digital image-processing technique to quantify the distribution, orientation, and shape of coarse aggregates (greater than or equal to 2 mm) in AC mixtures. Results of the quantitative measurements of coarse aggregate distribution and shape in AC mixture are then presented and analyzed. The quantitative results of AC microstructure clearly indicate the following findings: (a) the microstructure characteristics of coarse aggregates in AC mixtures can be accurately measured using the digital image-processing technique; (b) the area gradation of aggregate cross sections by the Feret diameter gives an excellent prediction of the sieve gradation of coarse aggregates (greater than or equal to 2 mm) used in the design of AC mixtures; (c) the major cross sections of coarse aggregate particles have the tendency to lie horizontally in the mixtures; and (d) comparison among two laboratory and two field compaction techniques provides valuable information related to compaction quality in terms of favorable aggregate distribution within the mixtures.
Supplemental Notes: This paper appears in Transportation Research Record No. 1492, Hot-Mix Asphalt Design, Testing, Evaluation, and Performance. 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
Monograph Title: Hot-mix asphalt design, testing, evaluation, and performance Monograph Accession #: 01399807
Language: English
Authors: Yue, Zhong QiBekking, WilliamMorin, IsabellePagination: p. 53-60
Publication Date: 1995
Serial: ISBN: 309061563
Features: Figures
(5)
; References
(30)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Subject Areas: Freight Transportation; Highways; Materials; I31: Bituminous Binders and Materials
Files: TRIS, TRB
Created Date: Dec 4 1995 12:00AM
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