Interpretation of aggregate volume fraction effects on fracture behavior of concrete

Fracture process zone has a strong effect on fracture energy particularly for concretes with coarse aggregates. In order to demonstrate this effect, four groups of concrete mixtures with various aggregate volume fractions were designed. Three point bending tests were applied on beam specimens with a single size but different notch size to obtain the boundary effect model based fracture energy. The results were evaluated to determine the effect...