Study on ligaments’ areas differences between different sizes of modCT concrete specimens

The topic of the paper is aimed at the initial study of different types of surface roughness—depending on the three different sizes used during destructive loading experiments. The specimens subjected to modified compact tension tests (modCT) are used for tensile mode loading. Same material is used—concrete, so the quasi-brittle fracture is represented. Change of roughness (through fracture surface area) is investigated by 2D laser profilometer scanning.