The country’s vigorous promotion of the application of new wall materials and the gradual replacement of solid clay bricks are an urgent need to increase resource utilization and protect the environment. It is a major measure for China to implement land resources protection and achieve a sustainable development strategy.
The state has stipulated that the use of clay bricks should be prohibited in more than 170 large and medium-sized cities after November 2003. During the “Twelfth Five-Year Plan†period, all brick finished products use autoclaved products. The State Council, the National Development and Reform Commission, the Ministry of Land and Resources, the Ministry of Construction, the State Administration of Taxation and other departments have successively introduced a series of encouraging policies and preferential measures. For example: income tax, value-added tax exemption policy, fixed assets investment adjustment tax to zero, land use tax and urban facilities supporting fee reduction, priority shall be given to the financial department of the profit and loss, and the slag discharge unit shall not be allowed to collect fees. and many more.
Each year, China produces more than 100 million tons of various types of solid waste, and the cumulative stockpiles have reached several billion tons. It not only occupies large amounts of land, but the harmful substances contained in it have seriously polluted the surrounding soil, water bodies, and atmosphere. Accelerating the development of new wall materials using coal gangue, fly ash, construction waste, metallurgical and chemical waste solid waste as raw materials is an important way to increase resource utilization, improve the environment, and promote the development of recycling economy.
According to the document issued by the State Administration of Industry [2005] No. 33, “according to the end of 2010, all cities prohibit the use of solid clay bricks, and the annual solid clay brick production in the country is controlled below 400 billion pieces.†Therefore, the development of new wall materials is not only in line with The vital interests of the broad masses of the people and the country's development strategy are also the direction of the people and the general trend. It is a sunny industry that benefits the country and the people. There is huge room for development and the market has broad prospects.
At present, some autoclaved lime-sand brick porous (blind-hole) bricks produced in China's mechanical lime sand brick equipment are the requirements for the implementation of national wall reform, overcoming the problems associated with the use of small hollow blocks and silicate solid bricks, and considering the development of high strength, Lightweight, heat-preserving multifunctional wall-type material that integrates wall structural materials, decoration, insulation, or heat-insulating materials, and uses it to build houses that reduce wall work after masonry The use of mortar for masonry will further speed up the completion of residential buildings, reduce the amount of materials used in construction sites, pile up sites and wet operations, and at the same time make substantial use of cheap Yangtze River sand, save a lot of clay resources, save energy, and protect the environment.
The autoclaved lime-sand bricks cannot be formed by the commonly used vibration molding process, and a bi-directional hydroforming process must be adopted. Bi-directional hydraulic molding products have high density, high strength, accurate geometric dimensions, and neat appearance. After the product is molded, it can be carried. At the same time, only the replacement of molds can produce standard brick solid bricks, porous blind hole bricks, porous blind hole blocks, energy-saving bricks and other products, to achieve a multi-purpose machine, creating a good condition for the diversification of factory products.
With the implementation of the new standards of thermal design for the construction industry and the building materials industry as the pillar industries of the national economy and improving the living comfort, the new green wall materials with the advantages of land, land, waste, energy saving, and low cost and high quality will be replaced. Clay solid bricks are imperative.
The state has stipulated that the use of clay bricks should be prohibited in more than 170 large and medium-sized cities after November 2003. During the “Twelfth Five-Year Plan†period, all brick finished products use autoclaved products. The State Council, the National Development and Reform Commission, the Ministry of Land and Resources, the Ministry of Construction, the State Administration of Taxation and other departments have successively introduced a series of encouraging policies and preferential measures. For example: income tax, value-added tax exemption policy, fixed assets investment adjustment tax to zero, land use tax and urban facilities supporting fee reduction, priority shall be given to the financial department of the profit and loss, and the slag discharge unit shall not be allowed to collect fees. and many more.
Each year, China produces more than 100 million tons of various types of solid waste, and the cumulative stockpiles have reached several billion tons. It not only occupies large amounts of land, but the harmful substances contained in it have seriously polluted the surrounding soil, water bodies, and atmosphere. Accelerating the development of new wall materials using coal gangue, fly ash, construction waste, metallurgical and chemical waste solid waste as raw materials is an important way to increase resource utilization, improve the environment, and promote the development of recycling economy.
According to the document issued by the State Administration of Industry [2005] No. 33, “according to the end of 2010, all cities prohibit the use of solid clay bricks, and the annual solid clay brick production in the country is controlled below 400 billion pieces.†Therefore, the development of new wall materials is not only in line with The vital interests of the broad masses of the people and the country's development strategy are also the direction of the people and the general trend. It is a sunny industry that benefits the country and the people. There is huge room for development and the market has broad prospects.
At present, some autoclaved lime-sand brick porous (blind-hole) bricks produced in China's mechanical lime sand brick equipment are the requirements for the implementation of national wall reform, overcoming the problems associated with the use of small hollow blocks and silicate solid bricks, and considering the development of high strength, Lightweight, heat-preserving multifunctional wall-type material that integrates wall structural materials, decoration, insulation, or heat-insulating materials, and uses it to build houses that reduce wall work after masonry The use of mortar for masonry will further speed up the completion of residential buildings, reduce the amount of materials used in construction sites, pile up sites and wet operations, and at the same time make substantial use of cheap Yangtze River sand, save a lot of clay resources, save energy, and protect the environment.
The autoclaved lime-sand bricks cannot be formed by the commonly used vibration molding process, and a bi-directional hydroforming process must be adopted. Bi-directional hydraulic molding products have high density, high strength, accurate geometric dimensions, and neat appearance. After the product is molded, it can be carried. At the same time, only the replacement of molds can produce standard brick solid bricks, porous blind hole bricks, porous blind hole blocks, energy-saving bricks and other products, to achieve a multi-purpose machine, creating a good condition for the diversification of factory products.
With the implementation of the new standards of thermal design for the construction industry and the building materials industry as the pillar industries of the national economy and improving the living comfort, the new green wall materials with the advantages of land, land, waste, energy saving, and low cost and high quality will be replaced. Clay solid bricks are imperative.
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