Features of Use of Industrial Technogenic Waste in the Field of Building Materials

Abstract

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).

Applied, Technical and Agricultural Sciences: Introduction of the Latest Technologies Into Use

“…The process of producing non-autoclaved cellular concrete has come a long way in the course of experimental research, which has helped to achieve the desired parameters of the material's physical and mechanical characteristics. Modern foam concrete can be used both for the manufacture of concrete structures directly at the construction site and for the production of prefabricated elements at landfills and moulding shops, and reinforced concrete product plants [8][9][10][11][12][13].…”

USAGE OF REGRESSION ANALYSIS METHOD FOR THE DETERMINATION OF BENZOPYRENE CONCENTRATION IN THE SOILS OF THE LANDFILLS AND REFUSE DUMPS OF SOLID MUNICIPAL WASTE (Eng)

“…Solid municipal waste (SMW) [1,2] represent great danger for the environment and human health , solid municipal waste is a mixture of the components, unlike the construction waste, which are generally homogeneous and can easily be recycled [3,4]. Volume of SMW, formed on the territory of our country, annually exceeds 54 mil.…”