Digital Repository, CP2006

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DETERMINATION AND PREDICTION OF CRACK PATTERNS IN ASPHALT MIXTURE UNDER STATIC LOADING
B. Birgisson, A. Montepara, E. Romeo, R. Roncella, R. Roque, G. Tebaldi

Last modified: 2013-03-12

Abstract


This paper presents a comparison between predicted and measured crackpatterns developing in asphalt mixtures during static loading. Two different stateconfiguration were investigated performing the Indirect Tensile Test (IDT) and theSemi-Circular Bending Test (SCB). A Digital Image Correlation System was applied toobtain a dense and accurate displacement/strain field of asphalt mixtures and fordescribing the cracking behavior. The resulting fracture behavior in the tests waspredicted using a displacement discontinuity boundary element method to explicitlymodel the microstructure of asphalt mixtures. The predicted crack initiation and crackpropagation patterns are consistent with observed cracking behavior. The results alsoimply that fracture in mixtures can be modeled effectively using a micromechanicalapproach that allows for crack growth both along aggregate surfaces, as well asthrough aggregates.

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