High-Performance Thermal Insulation Material Based on Waste Glass

Abstract

The article is devoted to the development technology of obtaining and properties of heat-insulating environmentally safe material production from waste glass. The subject of the study is a finely fraction of a mixture of window and container glass. Differential scanning calorimetry was used, the study of the gas release process was carried out on a specially designed and manufactured installation. Developed a foaming composition consisting of calcium carbonate and sodium nitrate, which allows you to combine the decomposition temperature of the main gas-forming agent (calcium carbonate) and the softening temperature of the glass, which is a necessary condition for obtaining a foam material with a minimum apparent density. The optimal mass ratio of sodium nitrate and calcium carbonate (100:35), the foaming temperature (700 ° C) and particle sizes (less than 60 microns) were determined, allowing to obtain a material with a density of 80-100 kg/m3. The dependence of the apparent density of the obtained material on the time of foaming and the content of the gas-forming agent is obtained by mathematical modeling, which allows determining the optimal time of foaming at different temperatures. During the development of the technology, factors affecting the properties of the resulting foam material were identified, and the dependence of the main technological parameters on these factors was established. For the production of thermal insulation material, a continuous powder method is proposed, including the processes of preparing a foaming composition and producing foam blocks. The developed material has a lower coefficient of thermal conductivity, higher strength and low density compared to existing analogues and does not emit hydrogen sulfide during operation. According to the developed technology, a pilot batch of foam glass was produced, which was used by a number of construction companies in various areas of construction.