Application of Composite Binders and Carbon Nanomaterial for Aerated Concrete

The article presents the results of research on the production of composite binders using Portland cement and fly ash. The composite binder is produced by co-grinding of Portland cement and fly ash. The carbon nanomaterial was used, obtained by the plasma-chemical method on high production apparatus to modify the composite binder and aerated concrete on its basis. The modified carbon nanomaterial obtained by adding Portland cement to the plasma-chemical synthesis process was used in the study. Replacing a part of Portland cement with fly ash in a composite binder contributes to the additional formation of calcium hydrosilicates due to the binding of portlandite. The use of carbon nanomaterial increases the strength of both the ordinary Portland cement and the composite binder. Infrared spectroscopic data on cement and composite binder indicate additional formation of calcium hydrosilicates when fly ash is used. Compositions of non-autoclaved aerated concrete with the use of a composite binder and carbon nanomaterial with improved physical and mechanical properties have been investigated. Indicators of strength, thermal conductivity and shrinkage during drying of aerated concrete compositions have been determined. With the use of electron microscopic analysis, a change in the structure of the porosity of aerated concrete is shown when using a composite binder with fly ash and carbon nanomaterial. A quantitative assessment of the porosity of aerated concrete was carried out, which proves the change in the size and uniformity of the pore distribution.

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.),
N.N. SMIRNYAGINA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
K.Kh. NAZAROVA, Еngineer (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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