The Effect of Technological Additives on the Structure of Foam Glass

The set of properties of foam glass provides the possibility of its use in many sectors of the national economy. Despite a fairly large number of publications devoted to foam glass, the issues of its structure have not been sufficiently studied. The issues of the kinetics of the foaming process of foam glass, the charge compositions of which are differently predisposed to crystallization, as well as the creation of foam glass with specified properties, depending on the conditions of its synthesis, are little studied. The purpose of this work is to study the effect of technological additives on the structure of foam glass. 9 compositions of foam glass, the main components of which are cullet, ash-slag mixture, are considered. Sodium tetraborate, technical chalk were used as technological additives; chromium oxide, zirconium dioxide, magnesium oxide were used as initiators of crystallization, anthracite was used as a gas–forming agent. The synthesized samples were studied using microtomographic analysis, the calculation and analysis of microtomographic porosity was carried out, the total and closed porosity, histograms of the distribution of the pure volume by quantity were calculated, the distribution patterns of the substance, the densest inclusions and pores in the volume are visualized. The mechanism of volumetric crystallization of glass, characterized by chemical differentiation of glass, causing heterogeneity of its structure, is shown. The results are a sequential stage in a series of studies aimed at solving the problem of developing a technology for designing building materials with the use of ash and slag waste from various thermal power plants.

I.S. GRUSHKO^1,2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Don State Technical University (1, 344000, Gagarina Square., Rostov-on-Don, Russian Federation)
² Platov South-Russian State Polytechnic University (132, Prosvjaschenija Street, Novocherkassk, 346428, Russian Federation)

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