Contribution of Interface Fracture Mechanism on Fracture Propagation Trajectory of Heterogeneous Asphalt Composites

Asphalt mixture is a type of textured composite material made aggregates and mastic part. Overall strength failure behavior in such materials depends on the texture or heterogeneity mixture. In particular, crack growth mechanism from tip pre-crack significantly affected by asphalt environmental conditions. The can extend through soft mastic, tight interface mastic/aggregates. this research, performing some fracture tests typical with different test specimens under mode I, mixed I/II I/III, resistance trajectory propagating studied at two low medium temperatures (i.e., −15 +15 °C). load bearing capacity tested samples increases decreasing temperature. It also shown that significant part plane passes boundary mastic) only about 10–15% surface via breaking them. This percentage decreases for II III loading conditions higher testing temperatures. Compared to brittle isotropic materials, path shows more deviation, deviation those mixtures containing coarser ligament temperature