TECHNICAL REGULATION OF THE USE OF SECONDARY RAW MATERIAL FROM CONSTRUCTION WASTE

Abstract. The purpose of the article is an analytical study of the results of the experimental determination of the technical characteristics of secondary materials made from fragments of concrete products and stone wall materials, and natural raw materials of a similar purpose to establish the possibility of their interchangeability and the need to improve the national regulatory framework due to the normalization of quality indicators for secondary raw materials for the production of concrete and reinforced concrete products. The results of the study of quality indicators of recycled materials from construction waste and natural materials for use as aggregates in concrete mixtures are presented, as well as the characteristics of cement concrete based on such materials. Analytical studies have established that, based on the results of comparative experimental studies of the technical characteristics of secondary materials made from fragments of concrete products and stone wall materials, and natural raw materials of a similar purpose, the researchers did not reach a unanimous conclusion on the full replacement of natural mineral aggregates in concrete with secondary raw materials of the same grain composition. Attention is focused on the fact that the experience of countries where a significant part of construction waste is processed into secondary raw materials proves the need to create regulatory documents for recycled materials. It is emphasized that there are no regulatory documents in the national regulatory base of Ukraine that would establish requirements for the quality indicators of recycled aggregates for use in concrete, which is one of the reasons for restraining the use of construction and demolition waste. Given the large number of buildings damaged or destroyed during the war, demolition waste is a mixture of different materials and fragments of different types of products, therefore, it is possible that a series of regulations for different compositions of recycled construction waste will be needed to ensure the involvement of material after recycling in construction production.