ANALIZA PARAMETRÓW MECHANIKI PĘKANIA W WARUNKACH I MODELU OBCIĄŻENIA BETONU

Nowadays fibre concrete, as one of the concrete`s composites, is still developing. The major idea of sustainable development deals with durability of constructions. Fibres in concrete improve resistant to cracks and by that increase durability. Taking this phenomenon into consideration, the knowledge of fracture mechanics parameters is really important. The aim of this paper was to determine the influence of basalt fibres addition to stress intensity factor and crack opening displacement (COD). Concrete discs 150 mm width and 50 mm thick with crack length’s 15, 45 or 75 mm were studied. Load was applied according to opening mode. Zwick/Roell Z250 machine was used in the experiment. Samples without fibres behave as quasi– –brittle but these ones with fibres worked more like quasi–plastic material. Results were very diversified, because of heterogenic structure of concrete and the fibres tendency to fuse.