Physico- mechanical properties of concrete with fibre hybridization and mineral additives

Abstract

This research looks at using silica fume and copper slag as concrete replacement material, which reduces pollution while simultaneously meeting the growing need for river sand in concrete. Assessment of compressive strength flexural strength, and split tensile strength at various ages are part of this experimental inquiry. The findings revealed that enhanced workability with increasing fibre concentration is a symptom of the combined usage of silica fume and copper slag having a substantial effect. The negative impact of steel fibres on concrete workability was mitigated by adding more flexible basalt fibre. All specimens showed improved compressive strength despite the impact of fibre hybridization, which implies the combined action of silica fume and copper slag in achieving increased strength at all curing ages. The flexural capacity of the concrete mixes was increased due to the fibres' bridging effect, the silica fume's binding effect, and the filling effect of the copper slag. Furthermore, hybridization of the concrete with steel, basalt, and glass fibre showed to be a good technique for boosting the overall performance of the concrete when combined with a 5% silica fume replacement as cement and a 30% replacement of sand by copper slag.