Reuse of concrete and brick scrap as aggregates in concrete is a promising direction for sustainable construction and efficient management of construction waste. In the context of rapid growth in construction volumes and disposal of construction waste, the use of secondary materials can reduce the burden on natural resources, reduce waste disposal volumes and reduce carbon dioxide emissions. This paper discusses the physical and mechanical properties of secondary aggregates, the features of their preparation and processing, as well as their impact on the strength, durability and other characteristics of concrete. Analysis of domestic and foreign experience shows that, subject to technological requirements, concrete with secondary aggregates can be successfully used in various building structures. Improving environmental and economic efficiency makes the reuse of concrete and brick scrap a relevant and justified solution in modern conditions. This paper is devoted to the study of the possibility of reusing construction waste — concrete and brick scrap — as aggregates in concrete. In order to substantiate the feasibility of such an approach, a detailed analysis of existing scientific publications and engineering developments in this area was carried out. Based on the collected data, an experimental plan was drawn up, including the preparation of secondary crushed stone samples and the production of cement concrete with different proportions of recycled materials.

The experimental part determined the physical and mechanical characteristics of crushed stone obtained from concrete and brick scrap, as well as the main strength and density indicators of concrete samples made using it. A comparative analysis with traditional fillers was conducted. The results showed that, subject to certain technological conditions, secondary materials can be effectively used in the production of concrete without significant deterioration of its operational properties.