Virtual testing procedure for cracking performance prediction of HMA
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A multiscale virtual-testing methodology is developed and evaluated with the goal of linking the binder and aggregate properties to the cracking performance of asphalt concrete. The main ingredients of the proposed methodology are (a) a virtual fabrication technique that generates the microstructure of asphalt concrete specimens without the need for physical fabrication, (b) a lattice modeling approach that simulates the micromechanical behavior of cracked asphalt concrete specimens, and (c) a multiscale methodology that incorporates the effects of aggregates of widely varying sizes. The resulting methodology is utilized to simulate the load-deformation behavior of real uniaxial tension test specimens. A comparison of the predicted response to the measured response indicates that the proposed method shows promise, but requires further work aimed at the fundamental understanding of the micromechanical behavior of the binder. 2008 Taylor & Francis Group, London.