The fractality of fracture patterns induced by splitting tests is investigated for four concrete. Image processing techniques are used to extract the crack topology from digitized images. The Box-Counting method is applied to the crack networks to measure their fractal properties. The fractal analysis can successfully describe the progressive vanishing of microstructural disorder effects, related to different scales of observation of the process. No clear correlation was found between the fractal dimension and the fracture energy in the composites. The most relevant effect of the invasive fractality of damage is the crack-resistance behaviour encountered in the tests.
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