DEVELOPMENT OF VARIOUS TYPES OF CEMENTS FOR THE DEVICE OF STRUCTURAL LAYERS OF ROAD PAVEMENT BASED ON ASPHALT GRANULAR CONCRETE MIXTURES

Abstract

Today, the highway is not just a construction site, but also an important component in the structure of the country's economic development. Recently, transport loads on the structural layer of pavement have increased many times over as a result of an increase in freight turnover on the roads of the automobile network. To maintain the operational reliability of roads and extend their life cycle, high-quality and innovative materials are needed, technological modes of work adapted to them, as well as timely laboratory research, quality control and monitoring of materials being developed. This will improve the physical and mechanical properties of materials used in the construction of pavement structural layers. One effective approach is to reinforce the pavement base using cement based asphalt granular concrete mix (AGC), which involves the recycling of local materials instead of expensive stone materials. In the work, studies were carried out on the effect of a binder based on NLMK PJSC granulated blast-furnace slag, modified with various chemical additives, on the physical and mechanical properties of the asphalt granular concrete mixture. The effectiveness of the developed compositions lies in the fact that the slag becomes more hydraulically reactive not as a result of activation with caustic alkali or other low-modulus soluble silicates, but due to the use of special reagents that do not adversely affect process equipment and workers. Moreover, the annual growth of carbon dioxide emissions into the atmosphere in the production of cement expands the need for the use of alternative types of binders in construction. It has been established that samples of AGBS-K type asphalt-granular concrete mixture based on the developed compositions of an inorganic binder exceed the strength characteristics of composites using cement.