Structure and Properties of Gypsum Compositions with Mineral Dispersed Additives

A study of the effect on the properties of gypsum binders of a mineral modifier, as which diabase was used, is presented. It is established that with the combined introduction of an non-activated mineral additive and Portland cement into the gypsum binder, an increase in compressive strength of up to 23% is achieved. With the joint introduction of a mineral additive activated in an ultrasonic dispersant and Portland cement into the gypsum binder, an increase in the compressive strength of over 100% is achieved in comparison with the control composition. The complex additive helps to increase the physical and mechanical properties of the material in the early stages of hardening. This may be due to the formation of a denser structure due to an increase in the dispersion of the mineral additive acting as crystallization centers, as well as due to greater activity of chemical interaction with the alkaline component. In the structure of the modified composition, poorly soluble products based on calcium hydro-silicates are formed, which compact the matrix of gypsum stone.

M.D. BATOVA¹, Master’s student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
Yu.A. SEMENOVA¹, Master’s student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.F. GORDINA¹, Cand. tech. Sciences (This email address is being protected from spambots. You need JavaScript enabled to view it.),
G.I. YAKOVLEV¹, Doctor of Sciences (Engineering) Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.F. BURYANOV², Doctor of Sciences (Engineering), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.E. STEVENS¹, Master (This email address is being protected from spambots. You need JavaScript enabled to view it.),
E.V. BEGUNOVA¹, Master (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Kalashnikov Izhevsk State Technical University (7, Studencheskaya Street, Izhevsk, 426000, Russian Federation)
² National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

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