Investigation of the porosity process of foamglass charges using carbon-containing gas-forming substances

The application of the Arrhenius equation for the production of foam glasses in the “perlite-cullet” system using carbon-containing substances as gassing agents is considered. When calculating the activation energy of the porosity, it is assumed that the processes occurring while firing foamglass charge in the temperature range of 850... 1000оС are in equilibrium. Graphs of the dependence of the sintered material density on the firing temperature are constructed. Calculations for the temperature range under consideration were used to obtain values of the activation energy of porosity, taking int account the type of gassing agent. It has been established that carbon-containing gas generators can be used to produce foam glasses of the “perlite-cullet” system without use of alkaline. The types of gassing agents that contribute to the decrease in the density of the sintered material at energetically favorable temperature regimes are determined. Mathematical dependencies are obtained that allow one to interpret the process of gas formation in the foam glass charge of the “perlite-cullet” system and determine the upper limits of the firing temperature regime.