- BUILDING MATERIALS AND PRODUCTS
- Foam Glass-Ceramic Thermal Insulation For Housing Construction In The Arctic And Subarctic Territories
- UDC 699.865:661.683(211-17)
doi: 10.33622/0869-7019.2023.02.66-72
Ivan I. VEDYAKOV1, dtsniisk@rambler.ru
Vladimir F. VASKALOV1, 9857654631@mail.ru
Nikolai I. MALYAVSKIY1, nikmal08@yandex.ru
Elena V. BAZHINA2, dtsniisk@rambler.ru
Mikhail I. VEDYAKOV1, vedyakov.misha@yandex.ru
1 Research Institute of Building Constructions (TSNIISK) named after V. A. Koucherenko, Research Center of Construction, 2-ya Institutskaya ul., 6, Moscow 109428, Russian Federation
2 Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
Abstract. A new technology for the thermal production of alkaline silicate granular glass-ceramic thermal insulation is presented. As raw materials, rocks of silica or aluminosilicate composition, glassy alkaline silicate (with the addition of carbonate and hydroxide) and carbon-containing pore agent are used. A part of the silica component is also included in the binder solution, which makes it possible to increase the value of the silicate module and the degree of pore closure. This factor, as well as the increased content of aluminum oxide in silicon-containing raw materials, makes it possible to obtain a foam material with high mechanical strength and water resistance. The foaming process of raw granules is carried out at high temperatures, which leads to the closure of the initially formed open pores and to the formation of new pores under the action of a foaming agent - immediately in the closed state. This makes an additional contribution to improving the water resistance and frost resistance of granules, as well as significantly reduces their thermal conductivity and water absorption. The insignificant weight loss of the samples during boiling in water puts the obtained foam materials on a par with the most water-resistant ones known at present. Taking into account the harsh climate and the presence of many deposits of silica, silicate and aluminosilicate raw materials, the development of this area for the construction industry in the Arctic and subarctic regions has special prospects.
Keywords: alkali silicate thermal insulation, thermal foaming, silica, aluminosilicates, soluble glass, water resistance - REFERENCES
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