Numerical simulation of split test process for asphalt mixture under heterogeneous state

In order to analyze the influence of heterogeneity on asphalt mixture split test, a realistic failure process analysis program was used to conduct the numerical simulation of split test. The Weibull distribution of asphalt concrete strength coefficient was assumed in the digital test to study the stress state and cracking process. Marshall split test was conducted on AC-10 specimen, and its split failure process was simulated. Analysis result shows that the cracking state tends to dispersion with the decrease of homogeneous degree, but the cracking state of specimen with high homogeneous degree is more regular. Affected by the stochastic distribution of heterogeneous element, the stress distribution presents multiple peaks in specimen split process. The split process of Marshall specimen in digital test is similar with that in physical test.