The article is devoted to the urgent problem of reducing cement consumption in the production of reinforced concrete building products and structures, since cement production is not only costly, but also very energy-intensive and is characterized by a high level of greenhouse gas emissions into the atmosphere, which negatively affects global climate change. In our country the problem of recycling of industrial waste is highly topical and is also related to the growing shortage of cement due to the almost complete exhaustion of production capacity of the cement industry. In this regard, there is an imperative need to find new scientifically based ways to save cement at enterprises of construction industry. The purpose of this research was to study the possibility of application of dump ashe-and-slag mixture of Novocherkassk thermal power plant. More than 500 million tonnes of waste have been accumulated in dumps of thermal power plant, which can be used as a mineral component for the production of organomineral additives (OMA) for concrete, thus reducing cement consumption. The aim was realised by the use of mathematical planning methods. The results obtained as a result of the research indicate the expediency of the use of ash-and-slag wastes generated by solid fuel combustion. The use of ash-and-slag wastes as a mineral component for the production of organomineral additives in concrete will save cement, which is the most expensive component of the concrete mixture. Perspectives of further researches in the direction of expansion of nomenclature of organic components of organomineral additives in concrete and optimisation of compositions of the specified additives on the basis of construction and interpretation of corresponding mathematical models, does not cause doubts. Such an approach allows to comprehensively solve actual problems of industrial waste utilization, cost reduction in capital construction, increase the level of environmental protection from anthropogenic impacts.