Performance Evaluation of Ultra High Performance Concrete Manufactured with Recycled Steel Fiber

Abstract

This study investigated the rheological properties and impact resistance of ultra-high-performance concrete (UHPC) enhanced by using waste steel fibre (WSF) extracted from waste tires. The experimental program involved testing five different percentages of WSF to fortified UHPC, which were produced to illustrate how WSF affected the rheological properties of UHPC. The five different percentages of WSF were of 0.3 %, 0.45%, 0.6%, 1.05% and 1.35% by volume of concrete. Both hardened and fresh properties, such as unit weight, compressive strength, slump, flexural strengths, indirect tensile strength (IDT), and impact resistance of UHPC were analyzed, and the results showed that Compressive strength, IDT, and Flexural increased by 49 %, 79 %, and 40 % for mixtures containing 1.35 % waste steel fibre, respectively. The UHPC mixes also showed significant higher impact resistance compared with conventional mix.