POLYFUNCTIONAL SLUDGE CONCRETE WITH CONDUCTIVE COATING MODIFIED WITH CARBON NANOMATERIAL

The purpose of this paper is to develop a unique multifunctional composite material and study its properties. To achieve this goal, it is necessary to solve the following main tasks: - study of the evolution of mechanical properties of sludge concrete under the action of cyclic water saturation-drying; - study of conductive coating modified with carbon nanomaterial; - study of hardening of heavy metals and mechanical properties of sludge concrete under the influence of cyclic water saturation-drying; - study of sludge concrete with an electrically conductive coating modified with carbon nanomaterial. Currently, there are more than 200 municipal sewage treatment plants in operation in the Republic of Belarus. The amount of wet sludge released during wastewater treatment at municipal treatment plants can be up to 2% of the volume of incoming wastewater. A significant amount of waste generated creates a problem with the need to place it, and not only in Belarus, but also in most countries of the world. The most promising method of using wastewater sludge is to use dewatered sludge as a fuel alternative to coal, for example, for cement production. Although this approach to a certain extent ensures effective disposal of sludge, but in the process of its combustion, the ash is enriched with toxic heavy metals, which creates a risk of environmental pollution. Thus, this does not completely solve the problem of sludge recycling. It was proposed to use the obtained sludge ash as an additional binder for concrete in order to prevent the leaching of heavy metals in sediments and reduce the environmental impact of clinker production. At the same time, there is the issue of floods and other external factors that provoke saturation of concrete with water, which leads to expansion and contraction of the material, thereby increasing the internal stress of the concrete. When these stresses reach the strength threshold of the concrete, cracks begin to form. At the same time, this increases the risk of leaching of heavy metals from the concrete matrix. These factors have become a problem for the use of slurry concrete in green building.