Recycling Materials in Construction

Abstract This paper presents a detailed and critical review of recycled materials used in the construction industry, with emphasis on sustainability, efficient use of resources, and reduction of environmental impact. The analysis is based on recent studies focused on construction and demolition waste (CDW), including materials such as recycled concrete aggregates (RCA), plastics, metals, glass, and industrial by-products like fly ash and slag. The comparison of multiple research works shows that recycling processes, material composition, and treatment techniques play an important role in determining the mechanical properties, durability, and environmental behavior of recycled construction materials. The results indicate that using recycled materials can lead to lower greenhouse gas emissions, reduced energy consumption, and decreased landfill disposal, while still ensuring acceptable performance in many structural applications. At the same time, several limitations must be considered. These include variations in material properties, higher water absorption in recycled aggregates, and the absence of clear standards for large-scale use. In addition, the study highlights the importance of modern recycling technologies, life cycle assessment (LCA) methods, and circular economy principles in improving the overall efficiency and reliability of these materials. Future research should focus on improving processing techniques, increasing durability, and developing advanced materials such as hybrid and smart systems. Overall, the use of recycled materials in construction can be considered an important step toward a more sustainable and low-carbon built environment.