STRENGTH AND DEFORMABILITY DISTRIBUTION IN UHPFRC PANELS

The resistance as well as strain hardening and softening properties of UHPFRC depend on the type of matrix and mainly on the initial fibre dosage and final fibre distribution and orientation in the cast element. According to the final fibre distribution and orientation these properties may vary in a wide range. The strength and deformability distribution in a thin UHPFRC panel is studied. Tensile and flexural specimens cut in different directions and at different positions in the panel are analysed in order to determine locally the mechanical material properties. The real fibre dosage, distribution and orientation are determined. The results show a wide scatter of the mechanical properties, whereas the physical properties, especially the air permeability, are not affected by the mechanical scatter.