Introduction. Fly ash is a by-product of electricity generation using coal or other solid fuels. It is a material containing various chemical compounds such as calcium, potassium and sodium oxides. Since fly ash is not a biodegradable material and can have a negative impact on the environment, its use in asphalt concrete is one of the possible ways to reduce waste and improve the environmental situation, as well as reduce the use of natural resources.
Problem statement. Road construction with asphalt pavements requires a large number of components of these mixtures. In this regard, the need for scarce carbonate mineral filler is growing. Therefore, it is advisable to consider research aimed at studying industrial by-products, in particular fly ash, in order to use them as mineral fillers for asphalt concrete.
Objective. To analyze the existing experience of using fly ash as a mineral filler in the production of asphalt mixtures for further implementation and improvement of environmental safety and performance characteristics of road pavements due to new road construction materials.
Materials and methods. Analysis of information sources and experience in the use of industrial waste as mineral filler, study of requirements for materials and their composition.
Results. An analytical review of the experience of using fly ash as a mineral filler was conducted. Various sources were studied and analyzed, requirements for materials, their grading and content in asphalt mixtures were established.
Conclusions. The analysis of information sources on the use of fly ash as a raw material for the production of mineral filler has established that it is used in full in different countries of the world and in most cases in road construction. It was found that the use of various wastes in road construction is a feasible option that requires further study.
