Comparative assessment of artificial (based on highly concentrated ceramic binders suspensions - HCBS) and natural (based on clay and kaolin) ceramic binders of similar composition is conducted. Analysis of their properties and characteristics shows both their significant similarity and significant difference. As with HCBS, the binding (strength) properties of clay and kaolin are determined by the colloidal particle content and nanoparticles within them. In contrast to HCBS, clay and kaolin have a significant content of chemically bonded water, a high water requirement for molding systems, and clearly different (by an order of magnitude and greater) shrinkage during drying. If binders based on clays are considered from the point of HCBS classification, then according to their chemical composition they may be classified as acid-amphoteric (similar to materials based on chamotte). However, in terms of chemically bonded water and volume concentration of a suspension, they are closer to HCBS of amphoteric and basic compositions. Addition of refractory clay and kaolin is very effective in ceramic concrete production.
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Translated from Novye Ogneupory, No. 9, pp. 25 – 35, September, 2020.
Continuation. Parts 1 – 4 of the article published in Novye Ogneupory Nos. 9 and 11 (2019) and Nos. 1, 3 and 7 (2020).
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Pivinskii, Y.E., Doroganov, V.A. & Doroganov, E.A. Cement-Free Refractory Concretes. Part 6. Comparative Evaluation of Natural (Clay) and Artificial Ceramic Binders (HCBS). Refract Ind Ceram 61, 507–512 (2021). https://doi.org/10.1007/s11148-021-00512-9
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DOI: https://doi.org/10.1007/s11148-021-00512-9