The first country in the world to research and produce shale is the United States, which has a history of more than 80 years. The world famous American skyscrapers are all made of ceramsite raw materials. Subsequently, the Netherlands, Denmark, Belgium, Russia and other countries are widely producing and applying ceramsite. China began researching ceramsite in 1956, mainly studying sintered fly ash ceramsite, which formed production capacity in the 1960s. In recent years, shale ceramsite production has developed rapidly in Beijing, Tianjin, Heilongjiang, Inner Mongolia, Jilin, Yunnan, Xinjiang and other places, and Heilongjiang has developed faster. However, it still cannot meet the market demand. The ceramsite factories in Qing'an and Hegang have even experienced the phenomenon that customers queue up after paying the money. It can be seen that the market demand for ceramsite is very strong and the market prospect is broad.
Meet the policy and adapt to the development requirements of the construction industry
With the development of social economy, the construction industry has developed rapidly. Due to its small size, heavy weight and poor thermal insulation performance, clay solid bricks are difficult to adapt to the needs of building development, while the development space of new building materials shale products is expanding. . The former State Building Materials Bureau, the Ministry of Agriculture, the State Land Administration, and the Ministry of Urban and Rural Construction and Environmental Protection successively issued the "Opinions on Strictly Restricting the Destruction of Bricks and Bricks to Actively Promote the Reform of Wall Materials". In 2005, the General Office of the State Council issued the State Council [2005]. Document No. 33, “Notice on Further Promoting Wall Materials Innovation and Promotion of Energy-Efficient Buildingsâ€, actively called for the development, promotion and utilization of new building materials and products. In the "Ninth Five-Year Plan" of China's national economic and social development and the 2010 long-term goal outline, it is also explicitly proposed to revitalize the pillar industries, and to develop and promote new building materials with the focus on building urban and rural housing and public facilities for the development of building materials industry and construction industry. And products. At the same time, in order to vigorously promote the development of the new wall material industry, the state and local governments have given preferential policies in various aspects such as taxation, and implemented the “three priority†policy for project development, loan and land use for new wall materials. The National Building Materials Bureau has determined that 20 cities including Beijing, Tianjin and Harbin will be pilot cities for the development of new building materials and their products. For urban buildings in the cold and cold regions, all energy-saving design standards must be met. The Provincial Construction Department issued the “Notice on the Approval of Energy-Saving Products for Construction Projects in Our Province†and the “Opinions on Strengthening the Production and Application Management of Building Blocks†to implement a market access system for wall materials.
Superior performance
The production of solid clay bricks not only destroys a large amount of effective cultivated land, but also consumes a lot of energy in the production process, pollutes the environment and causes huge losses to agricultural production. Ceramsite and its concrete products have five advantages: wide application, excellent performance, remarkable energy saving effect, strong construction adaptability and good technical and economic effects. The ceramsite insulation wall board and the ceramsite insulation beam trough are used in conjunction with the existing red brick wall to make up for the disadvantages of high thermal conductivity and large heat loss of the red brick wall. The shale shale production is located in the central part of Heilongjiang Province. Every winter heating, a large amount of coal ash is generated, which can provide sufficient mixed materials for the production of concrete blocks; the protection of the production and utilization of such wall materials The superior performance of arable land, energy conservation, waste utilization, and improvement of building functions is of great significance for the protection of the ecological environment.
Using shale to paint ceramsite concrete block as a new type of wall material, its volume is 1.7 times that of clay brick, and its thermal insulation performance is 1.2 times that of clay brick. It is undoubtedly the best substitute for clay solid brick. The Institute of Building Science tests that to achieve this standard, the solid thickness of the clay brick wall should reach 148cm to meet the requirements, while the shale ceramsite block wall can meet the requirements only 40cm, and the wall thickness is reduced by 3.7 times. The use area is expanded by 20%, and the house's winter heating and summer cooling energy consumption are reduced by more than 50%. According to the calculation of the authoritative department, the simple construction material price comparison method is calculated: 512 red bricks are needed per cubic meter, calculated according to 0.32 yuan per red brick, and the funds are 163.84 yuan. The ex-factory price per cubic meter of ceramics is 150-180 yuan, 270-280 yuan per cubic meter of load-bearing ceramic blocks, and 320-330 yuan for non-load-bearing ceramic blocks. Take multi-storey buildings (3-6 floors) as an example: in the case of no change in structure, the cost per square meter of red brick and load-bearing ceramsite block is (no fee): all use red brick is 100.35 Yuan/m2; use 25% load-bearing block 113.45 yuan/m2; use 50% load-bearing block 126.54 yuan/m2; use 100% load-bearing block 139.73 yuan/m2. Although the ceramsite block is slightly higher in price than the clay solid brick, the two are compared in terms of construction: the block is produced according to the design requirements, and the construction efficiency is much higher than the original building method; in the construction cost and use Life comparison: Clay solid bricks need external insulation boards for heat preservation treatment, the cost is increased, the wall life is shortened, and the insulation performance of the blocks eliminates the secondary insulation and prolongs the service life of the wall.
Great market potential
The ceramsite block has light weight, good heat preservation, low thermal conductivity, low heat loss, good impermeability and good fire resistance. These advantages make the ceramsite block popular in the construction industry. At present, Heilongjiang Province produces about 1 million cubic meters of light aggregate concrete blocks annually, of which about 400,000 cubic meters of ceramsite concrete blocks. These lightweight blocks can only meet the needs of 1.6 million square meters of construction work. According to incomplete statistics, the province's average annual construction area is more than 15 million square meters, or even higher. Only Harbin's annual completion area is 4 million square meters, and annual light-weight blocks are about 1 million cubic meters. From the perspective of Heilongjiang Province in China, about 10 to 4 million cubic meters of light-weight blocks are needed each year, and there are huge gaps of 2 to 3 million cubic meters in the light-weight block market, if the use rate of shale ceramsite blocks It accounts for 50%, and it still lacks 100-1.5 million cubic meters. Especially in the peak period of infrastructure construction, the contradiction between supply and demand is more prominent. In addition, with the acceleration of the construction of villages and towns and the improvement of the brick-and-mortar rate in rural areas, the demand for energy-saving and heat-insulating building materials in rural areas is increasing, especially in the northeastern rural areas where the central heating cannot be combined. It can also meet the heat preservation of oil pipelines and the heat preservation of water pipelines in thermal power plants. It is lower in cost than the pipeline insulation materials currently used, and has good heat preservation effect. Lightweight materials made of ceramsite can be exported to Japan, Korea, etc. The production and use of clay solid bricks, the demand for lightweight bricks will increase, and the market prospects for shale ceramsite blocks will be even broader.
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