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MECHANOSYNTHESIS OF NANOSIZED SILICA FOR OBTAINING A BINDER BASED ON SODIUM POLYSILICATE
Abstract
The study solves actual modern problem for obtaining polysilicate solution (as a mineral component of clinkerless binder) based on low-quality siliceous raw materials. A mechanochemical synthesis method of sustainable colloidal silica sol (with a particle size of 5-25 nm) is proposed, as well as a grounded choice of grinding parameters is made. Influence of protolytic properties of liquid phase on dispersion speed, aggregate and sedimentation stability of the silica sol are studied. The obtained dependence of the zeta-potential of particles from the pH of diluent has shown that in acidic region have equivalence point and a low zeta-potential area in which the colloidal particles become unstable (which may lead to gelification in the system). The results of experimental determination of the presence of soluble silicate in dispersion (by the spectral method) showed that during heating (up to 90 пїЅC) in a weakly alkaline medium there is a sharp increase in its output product. It is found that the sodium polysilicate produced in this method is highly reactive and during dehydration can form water-resistant and fireresistant film on the surface of various materials. A number of recommendations on the application of polysilicate as a component of mineral clinkerless binder are given.
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References6
Iler, R.K. The Chemistry of Silica: Solubility, Polymerization, Colloid and Surface Properties and Biochemistry of Silica. Wiley, New York, 1979. – 896 p.
Pesternikov G.N. e.a. Method of preparing sodium polysilicates. Patent RF, no. 2124475, 1999.
Vedat Deniz. An investigation on the effects of the ball filling on the breakage parameters of natural amorphous silica. / Advanced Powder Technology, Volume 27, Issue 4, July 2016, Pages 1272–1279.
Y.C. Ke and P. Stroeve. Polymer-Layered Silicate and Silica Nanocomposites. Elsevier, 2005. – 394 p.
Patent of the Russian Federation №2124475 “Method of preparing sodium polysilicates”.
Victor Danilov, Arkady Ayzenshtadt, Tatyana Makhova & Olga Bessert. Strength, thermophysical and fire properties of structural heat insulation based on wood-processing and mining waste. — 16th International Multidisciplinary Scientific GeoConference & EXPO SGEM 2016, Nano, bio and green — technologies for a sustainable future, Volume 1 «Micro & nano technologies advances in biotechnology», 2016 — pp. 313-318.
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