Response of Thin UHPFRC Targets with Various Fibre Volume Fractions to Deformable Projectile Impact

The resistance to impact loading was tested on rectangular slabs with the measurements of 300 mm × 400 mm × 50 mm (length × width × thickness). It was verified experimentally that fibres are important inhibitor of the damage when dealing with projectile impact. The damage of the slab was reduced significantly when the fibre volume fraction was increased. Also it was shown that the best performance was achieved with the highest fibre volume fraction. It is very important to note that using 2% of steel fibres in the thin UHPFRC targets resulted in no scabbing from the back face of the slab with only a front crater forming. This is very important for facade panels and walls that are used for the purpose of protecting people where no perforation and scabbing of the concrete are allowed to occur.