Influence of Binary Modifying Additives on the Processes of Hydration of Cement Systems

One of the important components in the production of building mixtures for various purposes are modifying additives. A promising direction in the development of technologies for the production of building mixtures is the creation of multifunctional additives that make it possible to simultaneously regulate several operational characteristics of a building mixture, ensuring their multi-functionality. The introduction of such additives, as a rule, in an amount of several percent by weight of cement, makes it possible to actively influence the processes of hydration and formation of the structure of hardened cement stone. The paper presents the results of research related to the study of the influence of binary modifying additives consisting of marble production waste – microcalcite (MCa) and nanosilicon dioxide (SiO₂) on the properties of cement systems. The resulting additives make it possible to obtain an increase in strength in the initial stages of hardening up to 40%, and at 28 days of age up to 51% compared to the control composition. A number of calorimetric studies were also carried out, the results of which were used to estimate the effective parameters of the macrokinetics equation, in particular the apparent activation energy of modified cement compositions under isothermal conditions.

А.А. KULIKOVA¹, Assistant (This email address is being protected from spambots. You need JavaScript enabled to view it.),
N.O. KOPANITSA¹, Doctor of Sciences (Engineering), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
M.A. DMITRIEVA², Doctor of Sciences (Physics and Mathematics), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
О.V. DEMYANENKO¹, Candidate of Sciences (Engineering), associate professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.G. PETROV¹, Candidate of Sciences (Engineering), associate professor (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Tomsk State University of Architecture and Building (2, Solyanaya Square, Tomsk, 634003, Russian Federation)
² Immanuel Kant Baltic Federal University (14, A. Nevsky Street, Kaliningrad, 236041, Russian Federation)

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