Технічна інженерія (Nov 2023)
The influence of high temperatures on the strength characteristics of building materials
Abstract
The use of sludge from stone processing enterprises, especially the granodiorite sludge, is an intriguing and promising direction of research. This material has a unique composition that can significantly affect the properties and characteristics of ceramic products. The study of this aspect is key to understanding the potential of using sludge in ceramics and the opportunities for ecological optimization of production processes. The publication examines the possibility of using waste from stone processing enterprises as a filler for ceramic products, in particular ceramic bricks. Waste from the processing of Pokostiv granodiorite and Kateryniv labradorite was taken into the study. The waste was baked in its pure form and in mixtures with clay. Heating took place up to 950 °С. After sintering, the samples were tested for compression. Although the particle size of granite slurry is similar to that of clay and the chemical composition is quite similar, the sintering temperature of 950 ºC does not induce a similar effect in granite slurry as in clay, forming an internal structure with increased porosity and an increased number of interconnected pores. This has a direct effect on the compressive strength of the material. However, ceramics produced with a content of up to 90% granite slurry demonstrate satisfactory compressive strength and are therefore suitable for the production of ceramic bricks. The addition of up to 90% sludge gives the material unique characteristics that make it attractive for use, including reduced density and increased porosity. Both of these aspects greatly influence the potential heat and sound insulation characteristics, which are important in the ceramic industry. Reducing the density allows you to get a lighter material with acceptable characteristics and a lower load on the building structure due to the inclusion of waste.
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