Influence of the Waste Steel Fibre Inclusion on the Mechanical Properties of Reactive Powder Concrete
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The mechanical properties of Reactive Powder Concrete (RPC) containing waste steel fibre (WF) recovered from waste tyres were experimentally investigated. The WF was added to RPC mixture in ratios of 1%, 2%, 3% and 4% of the total volume. The conventional casting and curing methods were utilized. Results of testing demonstrate that increases in the compressive strength, tensile strength and modulus of elasticity were achieved. The addition of WF effectively improved the energy absorption capacity of the RPC. Furthermore, the WF increased the strain at the peak stress, which indicates an increase in the deformability resistance of the RPC. The post peak branch of the stress-strain curve were more flattened as the WF content increased, which indicates an improvement in the toughness of RPC. However, the addition of WF to RPC up to 3% was flowable while increasing the WF content up to 4% results in less workable concrete. Based on the results, WF is considered as a promising alternative for the industrial steel fibres in the structural applications.