Laboratory Tests of Concrete Beams Reinforced with Recycled Steel Fibres and Steel Bars

Abstract

This paper explores the possibility of the partial replacement of the longitudinal reinforcement in reinforced concrete (RC) beams with recycled steel fibres (RSF). Testing was focused on the contribution of two volume ratios of the RSF—0.5%, 1.0%. Basic compression and flexural tensile tests were performed to evaluate the effectiveness of the fibres following current standards. Additionally, the full-scale beams with and without conventional reinforcement were subjected to four-point bending tests. The results indicate that RSF improved the load-bearing capacity of the RC beams. Cooperation of RSF with the steel bars in carrying loads was proved. Findings from the Digital Image Correlation (DIC) revealed no impact on the cracking pattern of the RC beams.

Effect of Tire Cords, Steel and Polypropylene Fiber Content on the Fatigue Response of Cement-Based Mortars

“…Primarily, it allows for the reuse of these materials, which would otherwise end up in waste sites, reducing environmental burdens. Additionally, steel fibers significantly enhance the compressive and tensile strength of concrete, resulting in improved resistance to compression and bending [18,19], as well as increased residual tensile strength under bending [20,21]. Moreover, their presence promotes even load distribution and minimizes the formation of micro-cracks, enhancing the durability of concrete structures [18,20,21].…”