Synthesis of Nanoproushers Amorphous Silicon Dioxide for the Construction Industry

Number of journal: 11-2019
Autors:

Selyaev V.P.
Neverov V.A.
Nurlybaev R.E.
Selyaev P.V.
Kechutkina E.L.
Liyaskin O.V.

DOI: https://doi.org/10.31659/0585-430X-2019-776-11-15-25
УДК: 624:539.2

 

AbstractAbout AuthorsReferences
Silica fume is a strategic multi-purpose raw material resource for the construction industry of the Russian Federation. The possibility of synthesis of microsilica on the basis of opal-cristobalite rocks is shown. It has been established that on the basis of diatomites from deposits of the middle Volga region of the Russian Federation and the Aktyubinsk region of the Republic of Kazakhstan, it is possible to obtain synthetic silica fume of high “purity” with silica content above 99%, particle size 20–200 nm, bulk density below 200 kg/m3. As a result of experimental studies carried out with the use of modern instruments and equipment, and analyzing the elemental composition, the structure of diatomites and the structural features of the surface of particles of disperse systems have established: synthesized silica fume is represented by the opal mineral; has an amorphous structure with porosity up to 95%; The surface of the particles of synthesized silica contains mainly silanol groups, adsorbed water, and is characterized by high heterogeneity with the fractal dimension of scattering inhomogeneities Ds=2.64. An analytical (polynomial) model of the dependence of the particle size, the “purity” of the synthesized silicon dioxide on the concentration, temperature, and the ratio L:S of a colloidal solution in the synthesis process was obtained. The possibility of using synthesized silicon dioxide for the production of: vacuum insulation panels (with a thermal conductivity of 0.002–0.02 W/m·K); high-strength cement composites (strength over 100 MPa on the seventh day); uviol glasses.
V.P. SELYAEV1, Doctor of Sciences (Engineering), Academician of RAACS (This email address is being protected from spambots. You need JavaScript enabled to view it.)
V.A. NEVEROV1, Candidate of Sciences (Physics and Mathematics) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
R.E. NURLYBAEV2, PhD (This email address is being protected from spambots. You need JavaScript enabled to view it.)
P.V. SELYAEV1, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
E.L. KECHUTKINA1, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
O.V. LIYASKIN1, Post-graduate student (This email address is being protected from spambots. You need JavaScript enabled to view it.)

1 National Research N.P. Ogarev Mordovia State University (68, Bolshevistskaya Street, Saransk, Republic of Mordovia, 430005, Russian Federation)
2 Satbayev University (Kazakh National Research Technical University named after K.I. Satpayev) (office 13, 22, Satpayeva Street, Almaty, 050013, Republic of Kazakhstan)

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For citation: Selyaev V.P., Neverov V.A., Nurlybaev R.E., Selyaev P.V., Kechutkina E.L., Liyaskin O.V. Synthesis of nanoproushers amorphous silicon dioxide for the construction industry. Stroitel’nye Materialy [Construction Materials]. 2019. No. 11, pp. 15–25. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2019-776-11-15-25


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