Study of the Water-Glass Role in the Foam Glass Synthesis Using Glycerol Foaming Agent

Abstract

The article discusses the peculiarities of the "water-glass – glycerol" foaming mixture components interaction during foam glass synthesis. The important role of the foaming additive type in the foam glass porous structure formation was described, the main foaming substances were listed. The obtaining and researching technology of the samples was described, the compositions of the initial batches using the "water-glass – glycerol" mixture were developed. It was shown that a material with a highly porous structure and density below 500 kg/m3 can be obtained only with the combined introduction of water-glass and glycerol. In this case, mixtures with a predominance of water-glass in the foaming mixture possess optimal properties. Using DSC, it was shown that the addition of water-glass to the mixture completely eliminates the evaporation of glycerol at lower temperatures and intensifies its combustion at higher temperatures. Thus, the addition of water-glass to the glycerol-based foam glass batch allows glycerol to be saved up to higher temperatures that increases the resulting material porosity.

The problems of protection and heat insulation of steel tanks which are used in hydrogen power engineering

“…Use of organic pore forming agent (glycerin) allows to reach uniform distribution of pore forming agent through the whole charge volume and, respectively, to obtain more homogenous porous structure. The foaming mechanism of foam glass passes according to the reactions (2) and (3) [18][19][20]:…”

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

“…Pyroxenes, garnets, amphiboles, feldspars, chlorites, epidote, and scapolite dominate the technogenic material [15,23]. Waste also contains pyrite, calcium carbonate, magnetite, and quartz [26].…”

“…Hesky et al worked on the development of liquid glass mixtures for the production of foam glass [25]. Goltsman et al studied the role of liquid glass in the synthesis of foam glass using a glycerol-based blowing agent [26]. Bernardo et al studied in detail Biosilicate glass-ceramic foams obtained as a result of the activation of refined alkalis and gel casting [27].…”