Investigation of The Properties of Ceramic Bricks with Nickel Slags by the Least Squares Method

The results of research on the development of the production of ceramic bricks from low-melting high-plastic clay with the addition of nickel slags by plastic molding are presented. An assessment was made of the dependence of criterion indicators – physical and mechanical properties of bricks (water absorption, density and compressive strength) on technological factors: firing temperature (900–1100^оC) and slag content in the charge (5–60%). The coefficients of multiple determination are established by the least squares method. The analysis of the obtained regression equations proves the validity of the selected factors, as the most influencing on the change in the physical and mechanical properties of products. For such indicators as water absorption, density and compressive strength of ceramic bricks, regression dependences are plotted. The adequacy of the regression models was also assessed. For the regression equation for water absorption, the average approximation error is 5%, for density – 2%, for compressive strength – 8%, which indicates the high accuracy of the constructed models. Based on the data obtained, taking into account the requirements of GOST 530–2012, two most optimal compositions of ceramic masses were selected, on the basis of which samples of ceramic bricks with the addition of nickel slag were molded. After firing, the products were characterized by compressive strength corresponding to the M175 and M200 grades.

V.A. GUR'EVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.A. IL'INA, Engineer (Graduate student)

Orenburg State University (13, Pobedy Avenue, Orenburg, 460018, Russian Federation)

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