The Influence of Different Fibres Ratio in the Cementitious Composite on Ballistic Resistance

Abstract

The aim of this work was to determine the resistance of cementitious composite to extreme load due to the different content of steel fibres. Extreme load was caused by the impact of the projectile. Resistance was evaluated on the basis of experimental research, where local damage was investigated on samples of ultrahigh performance concrete with a dispersed steel fibre reinforcement caused by a projectile impact. The projectiles were deformable and non-deformable with a calibre of 7.62x39 and 5.56x45 mm. The projectiles in the experiment hit the centre of the sample, or to specify the classification to the left or right side of the sample. The recording of the results served to evaluate the resistance of the individual samples to the local damage. The output of this paper is to find the optimal amount of fibre in ultra-high quality concrete with respect to its ballistic resistance.