Influence of using induction furnace slag as partial replacement for sand on the properties of UHPC

Abstract

This thesis investigates the utilization of Induction Furnace Slag (IFS) as a replacement for sand in Ultra-High-Performance Concrete (UHPC), aiming to enhance mechanical properties, durability, and sustainability. The research encompasses a comprehensive series of experimental formulations where sand is replaced with IFS at varying proportions (0%, 5%, 10%, 20%, and 30%). Key mechanical properties assessed include compressive strength, tensile strength, and flexural strength. The durability characteristics focus on resistance to environmental degradation, such as freeze-thaw cycles, chloride ion penetration, and sulphate attack. The findings reveal that moderate IFS replacement (10% and 20%) maintains high compressive strengths and significantly improves drying shrinkage characteristics due to enhanced particle packing and reduced pore connectivity. Furthermore, the study includes an environmental impact assessment through a detailed life-cycle analysis, quantifying reductions in carbon footprint and resource consumption. The incorporation of IFS not only promotes the recycling of industrial waste but also contributes to the reduction of the environmental footprint of concrete production. Practical recommendations are provided for the construction industry, emphasizing the use of UHPC with IFS for sustainable and resilient infrastructure development. This research underscores the potential of IFS as a valuable resource in UHPC, aligning with global efforts to achieve more sustainable construction practices.