Porovnání výbuchové odolnosti dvou UHPFRC směsí s běžně používanými betony na základě typu porušení

Abstract. This paper presents results of the extensive experimental programme which was performed in cooperation with the LAFARGE Centre de Recherche, University of Pardubice. Two proprietary UHPFRC composite materials were tested for their blast (contact and close-in) resistance. In total, twenty-eight slabs with dimensions of 1000 x 1000 mm and thicknesses of 100, 150 and 200 mm were tested. Specimens were loaded with explosive charge of weight of 100 - 1000 g in various distances from the specimens top surface. All specimens were visually evaluated for the damage extend, failure mode and crack pattern. Results from the experiment were compared with the results for normal strength reinforced concrete available in literature. These results are covered by two empirical approaches commonly used for the estimation of the type of failure and damage extend. Results showed that both tested premixes performed better than ordinary mixtures in terms of blast resistance. Differences between tested materials and commonly used mixtures were described as well. Finally, both materials were compared from the material properties point of view as well as by their blast resistance performance.