Modification of Composite Binders with an Ultrafine Additive Obtained by Hydrolysis of Portland Cement

The article presents the results of studies on the production of binders using aluminosilicate rocks – perlites of the Mukhor-Tala deposit of the Republic of Buryatia and an ultrafine additive obtained by hydrolysis of Portland cement. Composite binder obtained by joint grinding of Portland cement, vitreous and crystallized perlite. To modify the composite binder, an ultrafine additive obtained by the hydrolysis of Portland cement was used. The particle size of the ultrafine additive was determined by laser diffraction. The strength indicators of composite binders with different contents of vitreous and crystallized perlite have been determined. Physical and mechanical parameters of the developed compositions of composite binders with the replacement of the clinker component up to 30 wt. %, are not inferior to those of ordinary Portland cement. The combined use of crystallized and vitreous perlite promotes the appearance of additional centers of crystallization of calcium hydrosilicates and the binding of portlandite by amorphous silica. An IR spectral analysis of composite binders modified with an ultrafine additive was carried out. Changes in the phase composition of the formed calcium hydrosilicates have been established. The combined use of perlites and ultrafine additives in the composition of composite binders contributes to an increase in the degree of hydration, the formation of a larger amount of CSH(B).

D.V. DANZANOV, Engineer (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.),
S.A. LKHASARANOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
Zh.G. DAMBAEV, 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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