Another aggravation of the ecological and economic situation in Ukraine makes it necessary to develop new efficient technologies for processing and use of industrial man-made waste from the heat and chemical industries. Such technologies should ensure their maximum degree of use in the production of high-quality efficient construction products. The choice of technology for the preparation, processing and use of industrial waste depends on such factors as their chemical-mineralogical and particle size distribution and method of production. Although such wastes are mostly used as aggregates, their overall use remains low. The share of their use in the manufacture of construction products is 5-12%, and the manufacture of products requires additional energy consumption. The paper considers the possibility of using industrial waste not only due to their activation, but also due to the use of their multifunctional properties. When the inactivated ash is introduced into the concrete mixture, it increases the plasticity of such a mixture and at the same time the microfiller promotes the formation of a stronger contact zone by increasing the degree of crystal chemical similarity of tumors. Excessive amounts of ash in ash-containing materials lead to increased porosity and reduced rate of accumulation of strength over time, which impairs performance, including frost and corrosion resistance. Large-scale use of phosphogypsum is hindered by its specific features: physical state, high humidity, the presence of phosphoric and sulfuric acid and water-soluble harmful compounds of phosphorus and fluorine. Therefore, before using phosphogypsum, it is necessary to remove or neutralize harmful impurities and reduce the concentration of acid residues. Harmful impurities can be bound and acid residues can be neutralized by adding quicklime to the solution. Lime simultaneously neutralizes acids and binds water-soluble harmful impurities. The most effective method of using phosphogypsum, fly ash and fine powders of steel sludge SHH-15 is the integrated use of such waste, resulting in a complex metal-ash-phosphate binder (MАРВ).
The aggravation of the economic and environmental situation in Ukraine necessitates the development of new efficient technologies for the processing and use of industrial technogenic waste from the thermal power and chemical industries. Such technologies should ensure the maximum degree of use in the production of high-quality efficient building products. The choice of technology for the preparation, processing and use of industrial waste depends on the chemical, mineralogical, granulometric composition and method of production. Despite the fact that such wastes are used mainly as inert fillers, their overall use remains low. The share of their use in the manufacture of building products is 5-12%, at the same time, the manufacture of building products requires additional energy costs. Many industrial and municipal wastes, which are of great practical interest, remain insufficiently demanded for various reasons. In this regard, the popularization of the likely directions for the introduction of industrial waste and the effect achieved in this case is of fundamental importance. One of the main industries for the integrated use of waste is the industry of building materials, where this raw material can act as the basis for the creation of new highly efficient materials. Predicting the properties of such materials is a rather difficult task, the solution of which can be achieved through the formation of a systematic approach to determining quality indicators, as well as predicting and regulating the properties of materials depending on the goals and objectives solved by builders and technologists in the manufacture of building products.
This article provides information on the possibility of integrated use of phosphogypsum, metal sludge and red bauxite sludge in the manufacture of construction products. The aggravation of the ecological and economic situation in Ukraine requires the development of new efficient technologies for processing and use of man-made industrial waste from the chemical industry. Such technologies should ensure their maximum degree of use in the manufacture of construction products. The choice of technology for the preparation, processing and use of industrial waste depends on a number of factors, namely the chemical-mineralogical and particle size distribution and method of production. Although such wastes are mostly used as aggregates, their overall use remains low. The share of their use in the manufacture of construction products is only 10 - 12%. It has been established that in the presence of open dumps phosphogypsum and red bauxite sludge are a source of pollution of the surrounding areas. Large-scale use of phosphogypsum is hampered by its specific features: the presence in its composition of phosphoric and sulfuric acid and water-soluble harmful compounds of phosphorus and fluorine. Therefore, before using phosphogypsum, it is necessary to neutralize harmful impurities and reduce the concentration of acid residues. The most effective method of using phosphogypsum, fine powders of sludge steel SHH-15 and red bauxite sludge is the integrated use of such waste, resulting in metal-phosphate and metal-ash-phosphate binder. Key words: industrial waste; building materials; complex binder.
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