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Since the world's first aerated concrete plant was built in Sweden in 1929, its products soon became popular in It is widely used in Europe. Now more than 40 countries in the world produce aerated concrete, covering cold, temperate and tropical zones. In 1965, my country introduced Swedish SIPOREX patented aerated concrete technology and complete sets of technical equipment. In 1974, my country independently developed the first set of domestic technical equipment for aerated concrete. In 1980, my country's first large-scale aerated concrete plant, Wuhan Silicate Products Factory, built using domestic complete sets of technical equipment, was completed and put into operation.
1. The development status of my country's aerated concrete industry
There are currently 230 aerated concrete plants in my country, with an annual production capacity of 10 million m3. In 1999, the annual output was 4 million m3, of which The proportion of air concrete is about 90%.
2. The development prospects of my country’s aerated concrete industry
Although my country’s aerated concrete industry has reached a considerable scale and is at the forefront of the world, it still has great challenges. development potential. This is because the current development is very unbalanced. With the exception of Beijing, Wuhan, Lanzhou, Zhengzhou, Jinan, Dongguan and other cities, other cities have developed very slowly. In recent years, the development of the Northeast region, which can best demonstrate its thermal insulation performance, has almost reached However, it is completely blank in the vast rural areas. Even in cities with large development scale, such as Beijing, the advantages of aerated concrete have not been fully exerted. Aerated concrete is a multifunctional material that combines load-bearing and thermal insulation. According to the current national energy-saving standards, only using aerated concrete can a single material meet the standard (energy saving 50%). It is estimated that if aerated concrete is used in all buildings that should use aerated concrete, Beijing's annual output should increase from the current 1 million m3 to more than 6 million m3. And if cities across the country can reach the usage level that Beijing should be able to achieve (using 0.094 m3 of air-entrained concrete per square meter of building area), the country's air-entrained concrete production may reach 100 million m3.
3. The economic benefits of my country's aerated concrete industry
Because aerated concrete blocks are a new type of wall material that saves energy, soil and waste, it has the characteristics of light weight, With the advantages of thermal insulation, sound absorption and sound insulation, earthquake resistance, fire prevention, strong plasticity, and fast construction progress, aerated concrete has a vast market and most companies' products are selling well. At present, none of the major domestic aerated concrete production companies is losing money, and some companies have become local star companies, such as Wuhan Silicic Acid Products Factory, which is named by Wuhan City as one of the ten best-managed companies in the city with the same name as Wuhan Iron and Steel Group Corporation. One of the enterprises.
Aerated concrete blocks are a local building material in the construction industry due to their large transportation volume. Generally, its transportation radius does not exceed 100 kilometers. The current average price of this product in the market is 150-200 yuan/m3, and there is no inventory. With the increasing pace of urbanization and the gradual standardization of land resource utilization, the demand for aerated concrete blocks is expected to increase at a rate of 30% per year.
This product is a national environmental protection and waste recycling project and can enjoy exemption from adjustment tax on fixed asset investment, exemption from land use tax, exemption from income tax for 5 years, and exemption from value-added tax.