Dry Building Mixtures for Floor Coverings Using Nanodispersted Additives

The article presents the results of studies on determining the compressive strength of a composite binder for floor dry building mixes, which makes it possible to judge the physical and mechanical properties of the binder, when cement is hydrated without additives and with the addition of superplasticizer and nanodispersed silicon dioxide – nanosilica. The hardening kinetics of composite binders was determined using thermal analysis by differential scanning calorimetry (DSC) on a Mettler Toledo Excellence instrument with a modular design. With the introduction of superplasticizer, a steric hindrance appears, allowing the particles of the composite binder to be effectively dispersed in the mixture. With the introduction of nanosilica into the composition of the composite binder, the physical, mechanical and operational properties of the floor covering are improved due to the directed formation of the composite structure. It is proved that when replacing cement with fly ash by 30%, the preservation of the strength characteristics of the cement stone was determined. An increase in the uniformity and density of the structure, the formation of the optimal composition of the new formations of the hardening composite, in the analysis of the phase composition, were noted. It has been established that the joint introduction of Portland cement, fly ash, superplasticizer and nanosilica into a dry mortar for floor coverings leads to an increase in physical and mechanical properties.

E.V. BADMAEVA, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.),
S.A. LKHASARANOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
L.A. URKHANOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

East Siberia State University of Technology and Management (40B, Klyuchevskaya Street, Ulan-Ude, 670013, Russian Federation)

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