Concrete Hollow block is made by concrete block machine, used cement as the base material, gravel or waste residue as aggregate, by pressurized vibration molding, hollow rate between 30%~50%, replacing the traditional clay solid brick new wall material, concrete hollow brick has light weight, fire prevention, sound insulation, thermal insulation, anti-seepage, earthquake resistance, durability and other major characteristics, and no pollution, energy saving, is the green building materials that the contemporary need, it has become an important part of the new type of wall material in modern times, and has broad development space and development prospects.
Brief introduction of the development of concrete Hollow Blocks
Hollow blocks were first invented by the Americans. In 1866, American Harchison obtained the first patent certificate for the production of hollow blocks in the United States.In 1874, Rudols obtained a patent for hollow blocks of various shapes made of concrete.In 1890, Palmer's production technology made concrete blocks the first in the world. In 1897, a house was built with 30cm × 8cm × 10cm hollow blocks.In 1900, Palme invented the world's first hollow block forming machine, opening the way for the industrial production of hollow blocks.Since then, various mechanical and manual hollow block forming machines have appeared. A large number of hollow block factories began to be built around the United States, and block buildings began to spread.After the end of World War II, the output of hollow blocks in the United States has reached 500 million.The successful production and application of hollow blocks in the United States has led to the development of hollow blocks in Europe, America, Asia, Australia, Africa and other countries, and has gradually become a worldwide new wall material, which has been widely used.
At present, concrete hollow blocks have become the dominant wall materials in countries all over the world.In developed countries, the proportion of applications has accounted for 70% of wall materials. The annual output of the United States has reached 4.5 billion, South Korea 2.7 billion, Russia 900 million, Japan 300 million. There are more than 2,000 block types in the United States, and most of the buildings are constructed using hollow blocks.From the development trend of the whole world, hollow blocks will be developed on a larger scale, and it is an indisputable fact that it has become the first wall material.
China's hollow block production has also been nearly 80 years.In 1923, China introduced hollow block production technology from the United States, and built 25 block buildings at Tongren Road, Yan'an Middle Road, Shanghai, its external walls also used decorative blocks.In the 1960s, as a result of the rapid development of the New China cement industry, led to the production of concrete blocks, China's block factory rapidly increased, block factories were built in Duyun City and Shuicheng City, Guizhou Province.In 1973, Linyi County, Hunan Province produced a variety of wall blocks. Later, the development of hollow blocks in Tujia-Miao Autonomous Prefecture of Xiangxi was brilliant. However, the real large-scale development of hollow blocks in China is after the reform.In order to protect the land, save energy, and realize the light and energy-saving of the building, the state has listed the development of hollow blocks as the basic national policy, and established the National Hollow Block Association. Governments at all levels have set up wall material reform offices to promote the development of hollow block industrialization.At present, the annual output of China's blocks has reached 50 million m³, and nearly 100 million m²of block buildings have been built. 80% of the houses in Shaoxing, Zhejiang and Chongqing Sichuan have adopted hollow blocks.China's recently enacted "the 10th Five-Year" building block development planning requirements, by 2005, to strive for county town village building blocks and block buildings can reach the national construction block and block construction of the total amount of 1∕2,China's urban and rural building block construction of houses to double on the current basis, to 200 million square meters, total production reached 95 million m³, the annual growth rate of the block should reach about 15%. This grand plan will open up a new era of hollow block production in China. It is foreseeable that China's future buildings will mostly use hollow block buildings.
