EXPERIENCE IN THE USE OF INDUSTRIAL WASTE IN THE PAVLODAR REGION FOR THE PRODUCTION OF BUILDING MATERIALS

Abstract

The article discusses the experience of using waste from the electric power industry and metallurgy in Ekostroy NII-PV LLP, Pavlodar, Republic of Kazakhstan, for the production of construction products. The proposed composition of the concrete mixture, in comparison with existing analogues, provides for the use of local man-made waste (ash and slag waste from the burning of Ekibastuz coal, bauxite sludge from the Pavlodar Aluminum plant, steelmaking slags), differing in chemical and granulometric composition, as well as binding properties, from other analogues and prototypes. In the manufacture of construction products, a mixture is introduced, including, by weight %: slag portland cement – 14.32-17.00; sand – 18.74-25.52, crushed stone – 46.50-49.71, alumina sludge obtained during the processing of Kazakhstani bauxite – 5-7; self–disintegrating steelmaking slag - 5-7; ash and slag waste from thermal power plants from burning Ekibastuz coals – 5-7. According to the test results, the average strength of building products (paving slabs, curbs, hollow stone) is 4.3-4.9 MPa (strength class B3.5).