Modified Ash and Slag Waste in the Production of Semi-Dry Pressed Ceramic Bricks

The results of experimental studies of the secondary use of ash and slag waste from the CHP in a composition with clay alumosilicate raw materials of the Novosergievskoye deposit in the production of wall ceramics by biaxial semi-dry pressing are presented. The data on the annual coal mining and the formation of ash and slag dumps are presented, which, according to the specific effective activity of natural radionuclides, belong to the first class and can be used without restrictions. The physico-mechanical dependences of the composition of the charge: loam/ASW such as: compressive strength, average density, water absorption are determined. The expediency of introducing silica gel in an amount of 11% was revealed. Using X-ray phase analysis, neoplasms of anorthite- and volostanite-like crystalline phases were determined. These studies make it possible to obtain a 1NF ceramic brick with a strength grade of M150–175, with an average density of 1620–1790 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.V. DOROSHIN, Engineer (Graduate Student),
A.A. IL’INA, Engineer (Graduate Student)

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

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