Aerated concrete is a new kind of lightweight and porous construction material, which has the advantages of light weight, good insulation, machinability and non-combustion.It can be made into different specifications of blocks, plates and thermal insulation products, widely used in industrial and civil building load bearing or envelope filling structure, by the world's construction industry generally attention, become a building materials in many countries to promote and develop.　　

Aerated concrete is a porous silicate product made of siliceous materials (sand, fly ash and silicon-containing tailings, etc.) and calcareous materials (lime and cement) as the main raw materials, mixed with air-producing agent (aluminum powder), mixed with water, formed by chemical reaction, through pouring molding, pre-nutrition cutting, autoclastic curing and other technological processes.

Aerated concrete first appeared in the Czech Republic. In 1889, a man named Hofman obtained a patent for aerated concrete using hydrochloric acid and sodium carbonate.In 1919, Grosahe, a Berliner, made aerated concrete from metal powder not used as an aerating agent.In 1923, The Swede J. A. Eriksson mastered the production technology of using aluminum powder as an aerosol and obtained the patent right.The production of gas from aluminum powder is large, and the amount of hydrogen dissolved in water is small, so the gas production efficiency is high and the gas production process is easy to be controlled. The aluminum powder is from a wide range of sources, which provides an important condition for the large-scale industrial production of aerated concrete.Since then, with the continuous improvement of technology and equipment, the opportunity for industrial production is increasingly ripe, and finally in 1929, the first aerated concrete plant was built in Sweden.

Unipol in LAN and Stema in Denmark.Before World War II, aerated concrete was only popularized and applied in a few Northern European countries, but now, regardless of the cold region, or the hot zone near the equator, the production and application has spread to more than 60 countries in five continents.　

      As early as the 1930s, China has a record of producing and using aerated concrete.At the beginning, a small aerated concrete factory was built near the bridge of Pingliang Road in Shanghai. Its products are used for the inner partition of several single-story factories of the current National MAO No. 6 factory and high-rise buildings such as Shanghai Mansion, International Hotel, Jinjiang Hotel and New City Building, etc., and have been used till now.

     After liberation, China attaches great importance to the research and production of aerated concrete.In 1958, the former Institute of Building Science under the Ministry of Construction began to study steam raised fly ash aerated concrete. Since 1962, the Institute and relevant units in Beijing have studied and trial-produced aerated concrete products.And soon in Beijing silicate factory (now Beijing Light materials factory) and Guiyang grey sand brick factory industrial experiments were successful.In 1965, the patented technology and complete equipment of Cipolexx company of Sweden were introduced, and China's first aerated concrete factory -- Beijing aerated concrete Factory was built in Beijing, marking that China's aerated concrete entered the era of industrial production.

　　The development and application of aerated concrete process equipment in China began from 1971 when the technology equipment of Cipolexis was mapped, digested and absorbed.It has successively formed the 6-meter turning cutting unit of Northeast China Architecture Design Institute (at present, various equipment manufacturing enterprises have launched models of 3.9 meters ×1.2 meters, 4.2 meters ×I.2 meters, etc.);Shanghai Yangpu 4-meter pre-laid steel wire coil cutting type cutting unit;3.9-meter pre-laid steel wire lifting cutting unit of Beijing Building Materials Design and Research Institute;Changzhou Building Materials Research and Design Institute and China Architecture Northeast Design Institute copy of the High wave cutting unit;JHQ cutting unit digesting and absorbing Haibor by Northeast China Architecture Design Institute;The sitima complete set of equipment and 4 meters and 6 meters series of step cutting machine (imitated Yitong) and a complete set of equipment digested and absorbed by Changzhou Building Materials Research and Design Institute have laid a foundation for the domestication of aerated concrete equipment.

　　Since the first aerated concrete plant was built in 1965, China has built more than 330 aerated concrete plants in nearly 40 years.With a total design capacity of over 20 million cubic meters, it has become the country with the most extensive application of fly ash to produce aerated concrete and the most mature technology.Moreover, it further expands the scope of raw materials, and successfully USES other industrial wastes such as broken dust from stone processing, waste slurry discharged from cement pipe pile production, glass, coal mining, gold mining tailings and other silicon materials in aerated concrete production.With the development of production, a number of research institutes and colleges and universities engaged in the production, equipment and applied technology research of aerated concrete have emerged throughout the country, and systems of scientific research, design, teaching, construction, equipment and supporting materials have been established and improved.The standards and specifications of raw materials, products, test methods and construction applications have been formulated, which make China's aerated concrete form a complete industrial system.