Multifunctional decorative coatings based on cement-silicate binder

• Main Authors: Shaybadullina, Arina, Yakovlev, Grygory, Grakhov, Valery, Polyanskikh, Irina, Ginchitskaya, Yuliya
• Format: Conference Proceeding
• Language: English
• Subjects: Adhesion tests; Adhesives; Admixtures; Cement; Coating effects; Composition; Cost effectiveness; Decoration; Electromagnetic radiation; Facades; Frost resistance; Light fastness; Multi wall carbon nanotubes; Pearlite; Perlite; Portland cements; Protective coatings; Sand; Sodium silicates; Titanium dioxide; Zinc oxide
• ISSN: 2261-236X; 2274-7214; 2261-236X
• DOI: 10.1051/matecconf/201816308002

A facade decorative coating has been developed that is based on sodium silicate and Portland cement and modified with a complex ultra-and nanodispersed admixture including titanium dioxide, expanded perlite sand, and multi-walled carbon nanotubes dispersion. The advantage of the produced coating is using Portland cement as a silicizer instead of the conventionally used zinc oxide. Adding ultra-and nanodispersed admixtures to the cement-silicate composition leads to the structural modification of the matrix of the binder composition along with the formation of a more durable coating (up to 4-5 times compared with the existing analogues) and the possibility of absorbing man-made electromagnetic radiation up to 38%. Expanded pearlite sand in the silicate coating provides a relief surface when applied on the base. The cement-silicate composition for coating facades is shown to have the following physical and technical characteristics: the viscosity measured with Viscometer-6 is 29 sec; the hydrogen index of the medium pH=12.33; the film resistance to static effect of water is 8 hr; the paint consumption for a two-layer coating is 200-400 g/m2; the adhesion (the cross-cut test) is 1 point; the conventional light-fastness is 4-5 points; the frost-resistance of the silicate coating is 75 cycles. The developed facade cement-silicate coating can be applied on the surface of silicate-containing materials. The cost effectiveness of using the multifunctional protectivedecorative coating has been proved in comparison with similar compositions.