Influence of Limestone-Treated Construction Waste Aggregates on Mortar Properties: Optimization Using Response Surface Methodology

Multiple sectors, including agriculture and construction, have produced large amounts of waste in recent years, leading to significant environmental problems. The construction sector is currently faced with the severe difficulties of decreasing natural resources and a growing dependence on waste management, highlighting the need for quick action for an approach to recycling and the introduction of alternative materials. The study concentrates on recycling waste materials and developing innovative construction products. This includes replacing 20% of cement with limestone powder and rice husk, replacing 50% of fine aggregates with construction and demolition waste, and incorporating 1% coconut fiber. The evaluation of these materials involved conducting tests to assess compressive strength, split tensile strength, and flexural strength using cube, cylinder, and beam samples parallel to water absorption and non-distractive tests. The methods in machine learning, including Response Surface Methodology, were utilized for prediction, showing enhanced hardened properties. This study suggests that incorporating waste materials into construction practices can protect natural resources and provide sustainable options for the future.