2013年8月11日星期日

International Development of aerated concrete

Aerated concrete first appeared in the Czech Republic, 1889, Hoffman (Hofman) sodium salt made ​​of aerated concrete manufacturing patents. In 1919, Berliners Gro sand (Grosahe) made ​​with a metal powder as gas agent system out of aerated concrete, in 1923, the Swedes Exxon (J.Eriksson) with aluminum mastered the production of gas agent for the hair technology and obtained a patent. Send gas to large gas production of aluminum powder, produced by a small amount of hydrogen dissolved in water, it is made ​​of high efficiency gas, gas evolution process is also relatively easy to control, aluminum wide source, so as aerated concrete provides a large-scale industrial production important conditions. Since then, with the right technology and equipment, continuous improvement, industrial production has become more sophisticated, and finally in 1929, first in Sweden established the first aerated concrete plant. From the beginning of industrial production of aerated concrete has less than seven years of history, aerated concrete industry has been greatly developed, not only in Sweden, formed a "Yitong (Ytong)" and the "West Lieke Si (Siporex)" two patents and the corresponding number of factories, but also in many other countries have also introduced their own production technology or production technology research and development, especially in some cold climate countries such as Norway, the Netherlands, Poland, Denmark and other countries, their successful research production technology, the formation of a new patent. Such as Germany HYPOR (Hebel), the Netherlands seeking Laux (Durox), Poland, Ukraine Nepal (Unipol) and Denmark Division Tima (Stema). Before World War II, aerated concrete only in a few Nordic countries promote the application, and now, whether it is cold region, or the hot zone near the equator, production and application have been more than 60 countries across five continents.

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