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Title: CHARACTERIZATION OF FRACTURE IN ASPHALTIC MIXES BASED ON A MOLECULAR APPROACH
Accession Number: 00730229
Record Type: Component
Record URL: Availability: Find a library where document is available Abstract: In contradiction to the fracture mechanics approach, the fundamental absolute rate theory (ART) model describes the macroscopic behavior of processes on the molecular level. Attention is given to the theoretical background of the ART and its application to describing the crack growth process in asphalt concrete mixes. From the analyses, it is concluded that in the crack propagation phase, three parallel processes are distinguished: cohesive crack growth, adhesive crack growth, and a crack-retardant process. In the crack initiation phase, only cohesive crack growth is present. The difference between the mixes is specified by the free activation energy (Q sub a): increase in crack growth resistance increases the Q sub a value. This Q sub a value, determined from mechanical tests, is close to the energy that bonds the bitumen to the aggregate, determined from chemical tests.
Supplemental Notes: This paper appears in Transportation Research Record No. 1535, Characteristics of Asphalt Binders.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: JACOBS, MMJHOPMAN, P CMolenaar, A A APagination: p. 22-28
Publication Date: 1996
Serial: ISBN: 0309059100
Features: Figures
(6)
; References
(9)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials
Files: TRIS, TRB
Created Date: Dec 12 1997 12:00AM
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