The purpose of the study is to obtain a durable and cheap road-building material based on ash, reinforced with mineral astringent. Within the framework of the research, the optimal dosages of binders were searched for, the characteristics of the strength of mixture of ash with sludge and ash with cement were also determined. A comparative analysis of the economic efficiency between using a mixture of ash from the incineration of sewage sludge, reinforced with nepheline sludge, and traditional road building materials was carried out. The results of the study of mixtures of ash with mineral binders, such as nepheline sludge and cement, show that the obtained materials have high strength indicators and high indicators of the modulus of elasticity. They can be attributed to strength grades from M20 to M100. The developed building material (ash mixed with binders (nepheline sludge, cement)) could replace a similar building material in the technology of road construction, because if this mixture is taken in optimal dosages, it will be more profitable in the process of use, both from the point of physical and mechanical views, and point of view of economic indicators.

Studies have investigated the use of slaked lime in strengthening slurry of the sludge-ground and ash-ground mixtures in order to impart a higher strength to the crystal lattice, as well as to accelerate the hardening processes by reducing the acidity of the medium. The results of the exploratory study on the interaction of sandy soil with mineral binders, as well as the results of the study of the physico-mechanical characteristics of samples of ash-sand mixture with slaked lime and the study of the physico-mechanical characteristics of samples of nepheline sludge soil mixed with slaked lime are presented. The obtained results confirm that the use of localized soils reinforced by mineral binders, including industrial waste, is economically feasible, which will allow the development of forest roads infrastructure Recycling of industrial waste in significant volumes in forest road construction will reduce the area of storage sites, thus is a priority from the point of view of ecology.

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