Abstract
The rate sensitivity of concrete, mortar and mixtures of the two reinforced with recycled steel fibres was experimentally investigated with a use of Split Hopkinson Pressure Bar (SHPB). The range of strain rates achieved ranged between 54 and 115 s −1. The results of the investigation revealed the considerable strain rate effect in tested mixtures (DIF= 1.91–2.66). The insignificant influence of the coarse aggregate on the strain rate sensitivity of mortar also emerged, which was attributed to the type of the aggregate used. The observed strain rate sensitivity of the mixtures was significantly reduced by the fibre contribution in case of both concrete and mortar.
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