Investigating Mechanical Properties and Waste Management Strategies in the Sustainable Use of Construction Waste

The ongoing escalation in the volume of solid concrete generated through the dismantling of antiquated and impaired residential structures due to natural calamities and conflicts is contributing to an amplified demand for waste landfills. This surge in concrete disposal is concurrently exacerbating environmental degradation. To ameliorate these challenges, substantial research efforts have been directed towards exploring the viability of recycling solid concrete waste as a viable alternative to traditional aggregates in the production of ecofriendly concrete. Numerous laboratory investigations have delineated that the inclusion of materials such as recycled brick powder in specific proportions within the mortar mixture can affect mechanical properties for mortar. The primary aim of this research initiative is to scrutinize the influence of incorporating recycled brick powder in sequential proportions (5%,10%,15%, 20% and 25%) as a partial substitute for the cement component on the mechanical characteristics of mortar, In addition to the reference mix without powder replacements (0%). the experimental programs include three groups of tests: physical properties: (Particle-Size Distribution "Gradation", Water Absorption). Mechanical properties: (Compressive strength, and flexural strength), Mortars were meticulously evaluated using 40x40x160 mm specimens. The outcomes of the laboratory study, conducted over durations of 7 days, 28 days, and 56 days, revealed commendable mechanical properties diverge from those of conventional mortar, opening up new possibilities for incorporating recycled demolition materials into non-load-bearing structural elements, and various components in buildings. The significance of this research resides in the utilization of brick powder as an additive in mortar, presenting a dual advantage of environmental conservation by repurposing waste materials and mitigating the environmental impact associated with traditional waste disposal. Furthermore, the incorporation of brick powder in mortar formulations contributes to a reduction in the required quantities of cement for concrete manufacturing. This reduction not only enhances the sustainability of construction practices but also aids in minimizing carbon dioxide emissions attributable to the cement production process, aligning with broader environmental sustainability objectives in the construction industry. Moreover, as part of the extensive framework of this study, a comprehensive set of recommendations and evaluations was presented, specifically delving into the realm of emergency construction waste management. This included a thorough analysis of disaster waste management protocols to enhance our understanding and improve existing practices in handling construction-related waste during emergency (war, hurricane, earthquake, storm…).