Influence of Anthropogenic Waste on the Structure and Properties of Ceramic Bricks

The features of the effect of the introduction of nickel slags from the dumps of the South Ural Nickel Plant to the charge with low-melting clay of Khalilov deposit of Orenburg region on the properties of ceramic bricks are shown. Data on the influence of the material composition of the clay/slag charge on the strength, shrinkage, water absorption and density of experimental samples after firing in the temperature range of 900–1050°C are presented. With the help of modern research methods involving high – tech equipment, the micro-and macrostructure of ceramic samples with the addition of slag in the amount of 5–40% is considered. The structure of synthesized samples depending on the percentage of clay/slag was studied using mercury porometry. It was found that with an increase of the proportion of slag in the charge, the number of dangerous pores in the sample decreases from 2.9 to 0.18%, and the number of transition pores increases from 5.3 to 8.01%. Due to this, despite an increase in water absorption from 14.73 to 17.67% and a decrease in the ultimate compressive strength from 27 to 21.5 MPa, the frost resistance of samples with a slag content in the charge is 40% higher than that of samples containing 5% slag. The developed pore structure of both samples at the meso-level explains their relatively low density of 1500–1730 kg/m³.

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, Postgraduate Student

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

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