Abstract：
Accumulating vast amounts of pollutants drives modern civilization toward sustainable development. Construction waste is one of the prominent issues impeding progress toward net-zero. Pollutants must be utilized in constructing civil engineering structures for a green ecosystem. On the other hand, large-scale production of industrial steel fibers (ISFs) causes significant damage to the goal of a sustainable environment. Recycled steel fibers (RSFs) from waste tires have been suggested to replace ISFs. This research critically examines RSF\'s application in the mechanical properties\' improvement of concrete and mortar. A statistical analysis of dimensional parameters of RSFs, their properties, and their use in manufacturing various cement-based composites are given. Furthermore, comparative assessments are carried out among the improvements in compressive, split tensile, and flexural strengths of plain and RSF-incorporated concrete and mortar. In addition, the optimum contents of RSF for each strength property are also discussed. The influence of RSFs parameters on various strength properties of concrete and mortars is discussed. The possible applications of RSF for various civil engineering structures are reviewed. The limitations and errors noticed in previous review papers are also outlined. It is found that the maximum enhancement in compressive strength (CS), split tensile strength (STS), and flexure strength (FS) are 78%, 149%, and 157%, respectively, with the addition of RSF into concrete. RSF increased cement mortars\' CS, STS, and FS by 46%, 50.6%, and 69%, respectively. The current study encourages the building sector to use RSFs for sustainable concrete.
摘要：
大量污染物的积累推动了现代文明走向可持续发展。建筑垃圾是阻碍净零进程的突出问题之一。污染物必须用于构建绿色生态系统的土木工程结构。另一方面,工业钢纤维（ISF）的大规模生产对可持续环境的目标造成了重大损害。来自废轮胎的回收钢纤维(RSF)已被建议取代ISF。本研究严格考察了RSF在改善混凝土和砂浆力学性能方面的应用。RSF尺寸参数的统计分析，他们的属性,以及它们在制造各种水泥基复合材料中的用途。此外，在压缩性改进中进行比较评估，分裂拉伸,以及普通和RSF混合混凝土和砂浆的抗弯强度。此外,还讨论了每种强度性能的最佳RSF含量。讨论了RSFs参数对混凝土和砂浆各种强度性能的影响。回顾了RSF在各种土木工程结构中的可能应用。还概述了以前评论论文中注意到的局限性和错误。发现抗压强度(CS)的最大增强，劈裂抗拉强度(STS),挠曲强度(FS)为78%，149%,和157％，分别,在混凝土中加入RSF。RSF增加了水泥砂浆，STS,和FS的46%，50.6%,69%,分别。当前的研究鼓励建筑部门使用RSF可持续混凝土。
