In the 1930s, Saint-Gobain of France first developed foam glass with calcium carbonate as a foaming agent. In 1935, it applied for the first patent. Subsequently, in 1939, the Soviet Union experimentally produced foam glass at the intermediate pilot plant of the Mendeleev Institute of Chemical Technology.
Foam glass was first invented by Pittsburgh Corning Company of the United States. It is made of cullet, foaming agent, modified additive and foaming accelerator. After fine pulverization and uniform mixing, it is then melted at high temperature, foamed and annealed. And made of inorganic non-metallic glass materials. It consists of a large number of uniform bubble structures with a diameter of 1 to 2 mm. Among them, the sound-absorbing foam glass is more than 50% open-cell bubble, the heat-insulating foam glass is more than 75% closed-cell bubble, and the product density is 160-220 kg/m3 of foam glass insulation product, which can be passed according to the requirements of use. The changes are adjusted.
Because this new material has the functions of moisture proof, fireproof and anti-corrosion, and the glass material has the advantages of long-term use performance, it is in a harsh environment such as heat insulation, deep cooling, underground, open air, flammable, damp and chemical attack. It is favored by users. It is widely used in wall insulation, petroleum, chemical industry, machine room noise reduction, highway sound absorption barrier, electric power, military products, etc., and is called green environmental protection insulation material by users.
Depending on the properties of the foam glass, it can be used as insulation material in various sectors of construction engineering, as well as in shipbuilding, chemical, cryogenic and high temperature technologies. White and stained glass are also used as sound absorbing and decorative materials. Waste in production – foamed glass powder and scrap can also be used as fillers for decorative light concrete and other applications. Depending on the application, foam glass products produced by the corresponding processes can be divided into four categories, namely, insulating foam glass, sound absorbing decorative foam glass, facing foam glass and granular foam glass.
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