High-Temperature Modification of Saponite-Containing Material

One of the priority directions of the development of building materials science in the Russian Federation is the rational use of natural resources, which provides for the use of not only natural resources, but also various types of technogenic waste. In the Arkhangelsk Region, such waste is saponite-containing material (SCM), which is a multi-tonnage waste from the enrichment of kimberlite ores of the M.V. Lomonosov diamond deposit of the “Severalmaz” PJSC enterprise. Therefore, research on the search for new promising areas of use of this technogenic waste by its possible modification is relevant. For this purpose, the paper considers the issue of establishing the temperature regime of this process. As an integral criterion characterizing the change in the composition (nature) of the SCM during its high-temperature modification, it is proposed to use a physical characteristic similar to the Hamaker constant. It is established that at a temperature above 900^oC, the proposed characteristic reaches an asymptotic value, which may indicate the completion of transformational transformations in SCM samples. Also, differential thermal analysis of the saponite-containing material pre-crushed and processed at a temperature of 900^oC showed the absence of any thermal effects. In addition, high-temperature modification of saponite leads to a decrease in its specific surface area, porosity, pore diameter, moisture absorption and an increase in true density. These studies will serve as a prerequisite for optimizing the parameters of the temperature regime of the process of obtaining structural and thermal insulation material.

T.A. DROZDYUK¹, Engineer (Magister) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.M. AYZENSHTADT¹, Doctor of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
E.V. KOROLEV², Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Northern (Arctic) Federal University (NAFU) named after M.V. Lomonosov (22, Severnaya Dvina Embankment, Arkhangelsk, 163002, Russian Federation)
² St. Petersburg State University of Architecture and Civil Engineering (4, 2-nd Krasnoarmeyskaya Street, St. Petersburg, 190005, Russian Federation)

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