"USE OF FLY ASHES AND ASH AND SLAG MIXTURES OF PAVLODAR GRES-2 IN ROAD CONSTRUCTION "

In the context of increasing environmental load and increasing volumes of industrial waste, the search for effective methods of utilizing ash generated during fuel combustion at thermal power plants is becoming relevant. This work is devoted to the development of an ash-soil composite material designed to strengthen road bases using ash from GRES-2 in the Pavlodar region. The purpose of the study is to create a composition of ash-soil material with high physical, mechanical and operational characteristics. The study included a study of the patterns of formation of the structure and properties of the material depending on the formulation and technological factors, and a technology for its manufacture was developed. The scientific novelty of the study lies in the theoretical substantiation and experimental confirmation of the hardening processes of ash-soil composites, as well as the structure formation of the ash binder activated by individual and complex activators, depending on the soil moisture and compaction pressure. The practical significance of the work is manifested in the creation of an environmentally friendly and economically feasible solution for strengthening road bases using industrial waste. The implementation of the research results will reduce the volume of stored waste, reduce the environmental load and free up land plots used for ash dumps. The expected result is an increase in the strength and durability of road structures due to the use of ash-soil composite. Keywords: soil strengthening, cohesive soils, ash and slag mixture, lime, road construction, soil modification, frost resistance.