LONG-TERM STRENGTH OF COATINGS BASED ON SOL-SILICATE PAINT

Vestnik MGSU 7/2018 Volume 13
  • Loganina Valentina Ivanovna - Penza State University of Architecture and Construction Doctor of technical Sciences, professor, head. Department “Quality Management and construction production technologies”, Penza State University of Architecture and Construction, 28 Germana Titova st., Penza, 440028, Russian Federation.
  • Kislitsyna Svetlana Nikolaevna - Penza State University of Architecture and Construction Candidate of technical Sciences, associate Professor of the Department “Technology of building materials and wood processing”, Penza State University of Architecture and Construction, 28 Germana Titova st., Penza, 440028, Russian Federation.
  • Mazhitov Erkebulan Bisengalieva - Penza State University of Architecture and Construction Postgraduate Student of the Department “Quality Management and construction technologies”, Penza State University of Architecture and Construction, 28 Germana Titova st., Penza, 440028, Russian Federation.

Pages 877-884

Subject: durability of coating based on silicate paints. The article substantiates the prerequisites for using sol-silicate paints for finishing exterior walls of buildings. Sol-silicate paints obtained by mixing the sol of silicic acid with sodium liquid glass are considered. The features of formation of the structure of polysilicate solutions have been studied. Materials and methods: silicate and sol silicate paints. Polysilicate solutions were obtained by the interaction of stabilized solutions of colloidal silica (sols) with aqueous solutions of alkaline silicates (liquid glasses). The sol of the silicic acid Nanosil 20 and Nanosil 30 was used. For determining the long-term strength, samples measuring 10 ? 30 mm were cut from a free paint and varnish film. To evaluate the parameters of the activation energy, a series of experiments were performed to measure the longevity at various constant temperatures and stresses. Results: a higher value of the activation energy and a lower value of the structure-sensitive factor for coatings based on a polysilicate solution indicate their great strength and durability. When coatings are wetted, a decrease in the activation energy of destruction is observed, and it is more significant in coatings based on potassium liquid glass, and an increase in the structure-sensitive coefficient is also observed. Conclusions: studies have been carried out to evaluate the long-term strength of coatings based on silicate paints. It has been established that the activation energy of destruction of coatings based on polysilicate solutions is higher than the activation energy of destruction of coatings based on liquid glass. The values of the structure-sensitive factor are calculated. The results of the conducted studies and calculations indicate a higher resistance of coatings based on the potassium polysilicate solution.

DOI: 10.22227/1997-0935.2018.7.877-884

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ANALYSIS OF APPEARANCE QUALITY OF SILICATE COATINGS BY ATOMIC FORCE MICROSCOPY METHOD

Vestnik MGSU 5/2018 Volume 13
  • Loganina Valentina Ivanovna - Penza State University of Architecture and Construction Doctor of Technical Sciences, Professor, Head of the Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G. Titova st., Penza, 440028, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Mazhitov Erkebulan Bisengalievich - Penza State University of Architecture and Construction Postgraduate Student, Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G.Titova st., Penza, 440028, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 599-608

Subject: studying surface quality of silicate coatings based on sol-silicate paints. Research objectives: study regularities in formation of the quality of appearance of silicate coatings, depending on the type of film-forming agent. Materials and methods: polysilicate solutions were prepared by interaction of stabilized solutions of colloidal silica (sols) with liquid glasses. Scanning probe microscopy methods were used to assess the quality of the coating surface. The parameters of surface roughness were determined. Results: it is shown that it is possible to improve the appearance of silicate coatings by using in paints the polysilicate solutions as a film-forming agent. It has been shown that for coating samples based on sodium and potassium polysilicate solution, the surface patches with a less pronounced relief are observed compared to the nature of microprofiles of the coating samples based on potassium and sodium liquid glass. Coatings based on potassium and sodium polysilicate solution are characterized by more uniform distribution of the surface roughness. Conclusions: sol-silicate paints are characterized by higher quality of appearance of the coatings.

DOI: 10.22227/1997-0935.2018.5.599-608

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