Air-entrained concrete is a kind of porous lightweight concrete. It is a porous concrete made of silicon and calcareous materials by grinding into slurry, adding air-generating agent, forming and cutting, and autoclaved curing. It belongs to the category of foam concrete. The quality is much better than that of foam concrete.
Autoclaved aerated concrete came out in 1889 and was successfully developed in Sweden for the first time in 1929. The country's Ytong company obtained a technical patent. Since then, the world has begun the industrial production journey of autoclaved aerated concrete. Before the Second World War, the production of aerated concrete did not exceed 1 million m3, and it was mainly concentrated in the three Nordic countries: Sweden, Norway and Finland. The Second World War seriously hindered the rapid development of aerated concrete, which made the emerging industries with good development momentum stagnate. Until the end of World War II, due to the global energy shortage, the aerated concrete with energy-saving advantages was once again obtained. develop. In the 1950s, Western Europe, Eastern Europe, and the former Soviet Union successively introduced aerated concrete production technology and improved the production process, and a number of patented technologies emerged.
my country is an earlier country in the production and application of air-entrained concrete. As early as from 1932 to 1934, he set up a factory in Shanghai to produce aerated concrete blocks, and built five tallest buildings with 17 to 20 floors in China at that time: International Hotel, Xincheng Hotel, Jin Jiang Hotel, Riverside Building and HSBC Bank. After the high-rise was completed, the factory also ceased production. After the founding of the People's Republic of my country, in the 1960s, our country introduced the technology of Sypolex from Sweden and set up a factory in Beijing to build an aerated concrete production line, which opened the prelude to the industrial production of aerated concrete in my country. After more than 30 years of development, especially since the reform and opening up, the aerated concrete industry has developed rapidly. More than 1,230 large aerated concrete plants have been built across the country, with an annual production capacity of 10 million m². , production base and other complete systems.
