Shenyang gas filling block The manufacturer introduced that as early as the Roman period, people used porous stone for the walls and dome of temples, which has reduced the weight of buildings. After the concrete came out as an artificial stone, scholars tried to mix bubbles into it to reduce its weight. How to generate bubbles has become a hot topic. In 1889, the Czech Hoffman obtained zhuanli, which uses hydrochloric acid and sodium carbonate to generate gas through chemical reaction to consume aerated concrete. In 1919, the German Berlin Peyrosahai used metal powder as the air entraining agent to produce high-quality aerated concrete, but the consumption process was unstable. In 1923, Eriksson, a Swede, obtained a consumption technology of aluminum powder as a gas generating agent, and obtained zhuanli.

This kind of air entraining agent has a large output and a small amount of hydrogen dissolved in water, so the air entraining efficiency is high, the air entraining process is relatively easy to control, and the aluminum powder resources are also rich, thus providing important technical conditions for the large-scale industrial consumption of aerated concrete. Later, with the continuous improvement and innovation of aerated concrete technology and consumption equipment, The opportunity for industrial consumption has become increasingly mature. Finally, in 1929, a world aerated concrete factory was built in Sweden. The products were soon widely used in Sweden and the cold regions of northern Europe, known as "the cold clothes of buildings"

Nowadays, there were more than 40 countries in the world that used to consume aerated concrete, all over the cold zone, micro zone, and tropical zone, especially Germany, Russia, Poland, Sweden, and Japan. However, the consumption of aerated concrete abroad mostly used ground sand as the siliceous raw material. This is because there are few coal fired power plants in these countries. Even if there are coal-fired power plants in some countries, their fly ash is not waste, but has greater application value than the consumption of aerated concrete. Poland's fly ash aerated concrete industry is booming, with an annual output of more than 1.5 million cubic meters. They have invented their own technology and complete equipment suitable for the consumption of fly ash aerated concrete.

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