OBTAINING AND STUDYING PHYSICAL AND MECHANICAL PROPERTIES OF SULFUR CONCRETE COMPOSITIONS

The development of new types of building materials that can function effectively for a long time in various aggressive conditions and climatic zones is one of the most important areas in modern construction materials science. As part of the study, fifty sulfur concrete compositions based on petrochemical and thermal power industry waste were developed using the "hot" technology method. In the process, the physical and mechanical properties of these compositions were studied, including compressive strength, density and water absorption. To achieve optimal characteristics of sulfur concrete, it is necessary to include three main components: technical sulfur, quartz sand and ash and slag waste with varying degrees of dispersion. The optimal sulfur content in the compositions should be 40% or 45% by weight to ensure maximum physical and mechanical properties. The study revealed that an increase in the proportion of ash and slag waste or quartz sand leads to a sharp decrease in the strength of the samples. Increasing the proportion of ash and slag waste in sulfur concretes leads to a significant increase in water absorption and a decrease in density, which is explained by an increase in the porosity of the samples. The effect of the modifier - sodium silicate - on the physical and mechanical properties of concrete was also studied. Adding this modifier reduces strength (several times), but at the same time reduces water absorption by 8-10% and increases density by 7-10%. In conclusion, the results of the study emphasize the importance of the composition for the physical properties of sulfur concretes and open up opportunities for their use in construction.