Investigation of Strength and Durability of High-Performance Concrete Incorporating Partial Replacement of Sand with Quartzite Waste

Concrete is the most widely used construction material due to its versatility, strength, and durability. However, the continuous exploitation of natural river sand as fine aggregate has led to environmental degradation and scarcity of resources. This research investigates the feasibility of using Quartzite Waste (QW) as a partial replacement for fine aggregate in High-Performance Concrete (HPC). Various replacement levels of Quartzite waste (0%, 20%, 40%, 60%, 80%, and 100%) were examined for their impact on workability, compressive strength, split tensile strength, flexural strength, and durability properties such as water absorption and acid resistance. The results reveal that a partial replacement of 40–60% yields optimal mechanical and durability performance. Thus, incorporating Quartzite waste in HPC not only promotes sustainable waste management but also enhances the mechanical and durability performance of concrete.