OPTIMIZATION OF PARTICLE SIZE COMPOSITION OF FILLERS OF HEAT-RESISTANT CONCRETE OF FINE-GRAINED STRUCTURE
Special attention of manufacturers of refractory products is attracted by heat-resistant concrete of fine-grained structure. The task of optimizing grain composition of heat-resistant concrete aggregates based on by-products and related products of silicon carbide production and wastes of abrasive tool production on ceramic bond is of scientific and practical interest. It is proposed to use grain compositions of intermittent granulometry for heat-resistant concrete. Due to the use of discontinuous granulometry of the grain component of the heat-resistant concrete composition, an optimal ratio between the grain sizes of quartz sand and the abrasive waste was achieved. Uniform distribution of aggregate in the heat-resistant concrete mixture made it possible to obtain tight contact between their grains, which caused a dense, well-packed concrete structure, and makes it possible to save cement binder by 5…10 %. The compressive strength of the intermittent particle size aggregate samples was 38,7 MPa, and the thermal resistance (water, 800 °C) was 16.