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Heat-resistant non-combustible material for covering surfaces of special configurations
DOI: 10.62564/M4-ID9512
Iryna Diduk1, Yurii Chuvashov1, Olga Yashchenko1, Tamara Trofimova2
1Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine
2SE STC "Basalt-fibre materials" IPM NAS of Ukraine
Thermal insulation products are available in a wide range. Organic and inorganic binders are used to produce thermal insulation coatings that provide adhesion to the coating surface. Basalt Super Thin Fibres (BSTF) with an average diameter of 2 µm; canvas density of 20 kg/m3; thermal conductivity of no more than 0.038 W/m K at a temperature of 25 °C were used for the study. Both inorganic binders (gypsum, cement, bentonite clay) and organic binders (resin FRV 1-A and hardener VAG-3, hydrolysed ethyl silicate, bakelite varnish) were used as binders. The criterion for selecting the composition of the sprayed coating was the need to obtain a fibrous composition with the highest possible thermal insulation properties. Therefore, the research was focused on the development of a binder with high frost and moisture resistance and insignificant changes in physical characteristics over a wide temperature range. The introduction of BSTV into the binder was carried out by mixing it with hydromass. As a result, samples were obtained dispersed reinforced with basalt fibres. The selection of the composition of the thermal insulation samples was evaluated by the coefficient of thermal conductivity, water absorption, and density. Experiments with bentonite clay showed the best results, as the resulting material has a lower bulk density, is chemically inert, and is environmentally friendly to use. According to the conducted researches it is established that the content of clay binder in clay-fibre compositions should be within the limits from 5 to 30 %, depending on the required density and strength of thermal insulation. Other conditions being equal, with increasing density the thermal insulation properties of fibre insulation at ordinary temperature deteriorate, while at increasing temperature from 300 to 500 C the thermal insulation properties improve with increasing density. It was found that the optimum density is 220 to 250 kg/m3 for the above conditions.
Keywords
basalt fiber; heat-resistant non-combustible fibre material
Acknowledgments
Not provided
References
[1] Chuvashov Y.N., Yashchenko O.M., Diduk I.I., Tymchyshyn S.V., Medvedev T.O., Fibrous insulation from rocks of basalt-like composition as an effective means of energy saving [in Ukrainian], Magazine Building materials and produckts. 2018, № 3-4, С.58-61
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