Influence of the Chemical Nature of Plasticizers on the Properties of Gypsum Paste and Stone

The results of the study of the effect of additives of different types of industrial plasticizers (water – soluble surfactants), widely used in cement concretes – C-3, Melflux, Stachement 2280, on the technological and physical-mechanical properties of gypsum binder are presented. It is established that their introduction into the gypsum paste leads to a significant water-reducing effect, depending on the chemical structure and concentration of the additive, and the setting time changes: C-3 monotonically reduces them, and Stachement and Melflux slow down the hydration process of semi-aqueous gypsum. The concentration dependence of the strength of the cured gypsum binder is described by curves with maxima at 0.5% (C-3) and 0.6% (Melflux, Stachement). The latter increase the compressive strength of the cured gypsum binder by 5 times, and when bending by 3.5 times compared to the strength of the unmodified binder.

V.G. KHOZIN¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
N.V. MAYSURADZE¹, Candidate of Sciences (Engineering)
A.R. MUSTAFINA¹, Graduate Student
M.E. KORNYANEN², Director

¹ Kazan State University of Architecture and Engineering (1, Zelenaya Street, Kazan, 420043, Republic of Tatarstan, Russian Federation)
² OOO “Gypsum Company” (“Gipsovaya Kompaniya”) (24, Off. 305, Volzhskaya Street, Siukeevo Village, Kamsko-Ust’insky District, Republic of Tatarstan, 422825, Russian Federation)

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