The building materials industry needs to save energy, reduce consumption, and protect the environment.
Experts suggest that we should actively promote the development and production of green building materials
Green building materials should first be environmentally friendly.
The definition given by Prof. Gu Zhenan, a member of the Chinese Academy of Engineering and a member of the China Academy of Building Materials Science, is that the essence of green building materials is to build a resource-saving and environment-friendly building materials industry with the lowest resources, energy and environmental costs. Accelerate the optimization and upgrading of the building materials industry with modern technology.
The energy consumption of the building materials industry is second only to the power and metallurgical industries. In recent years, the energy consumption of the building materials industry accounts for about 9% of the national energy consumption and 13% of the national industrial energy consumption. Cui Yuansheng, chief engineer of China Institute of Building Materials Industry and Technology Information, said: In the long term, the building materials industry will maintain the momentum of rapid growth. Therefore, relying on scientific and technological progress, saving and effectively using resources, controlling pollution in the production process, and achieving sustainable development of the building materials industry are particularly important.
China's construction industry has developed rapidly over the years, but more than 95% of high energy-consuming buildings have an annual energy consumption that exceeds one-fourth of the national total energy consumption. The main body of building enclosures - wall materials are poor in heat insulation and thermal insulation properties. main reason. Xi'an University of Architecture and Technology, School of Materials, has experimented with an environmentally friendly thermal insulation material, using waste polystyrene plastic granules, through the optimal gradation design between powdered and granular materials. Engineering practice shows that this material has the characteristics of low thermal conductivity, excellent thermal insulation, stable construction performance, non-toxic and non-radioactive pollution, and so on. There is also a new type of coating, which is a kind of thermal insulation coating combining hollow ceramic microbeads with elastic acrylic resin emulsion so that it has high reflectivity to visible sunlight and near-infrared sunlight, high emissivity, and low thermal conductivity. It has the advantages of high compressive strength, low heat storage coefficient, good thermal insulation effect and resistance to micro-cracks and excellent weather resistance.
Some experts believe that the society needs the paint industry to develop in the direction of environmental protection, low toxicity, energy saving and multi-functionality. Enterprises should follow this trend and find business opportunities from them. There is an anionic coating product that uses a special natural mineral material that continuously produces negative ions. This negative ion coating removes floating dust, odors, and fumes, and it has the functions of sterilizing and decomposing formaldehyde to purify the air. At present, the National Coatings and Pigments Standardization Technical Committee has applied to the National Standards Committee for the development of anion coating industry standards.
The development, production, and sales of domestic green building materials are in full swing, but on the other hand, the concept of “green building materials†may also be abused. For example, many products are called “green building materialsâ€, but currently new wall materials only account for the total amount of wall materials. The amount of 30%, high-quality cement also accounts for only 30% to 40% of the country's total cement production. China's building materials industry still has few high-tech technologies, many traditional backward technologies, and complex production processes, many production processes, and low production efficiency. Raw material waste and so on. In addition, the high prices of some "green building materials" cannot be ignored. Industry insiders pointed out that at present, green buildings and green building materials are in the ascendant in China. They are also an emerging industry in the world. The related technologies and products have not formed a complete and mature system. When the market does not reach sufficient scale and industrialization, the price The system must also be high, and if it is not possible to design the project meticulously, the green building is bound to come at a high cost.
Not only environmental protection, energy conservation, sustainable development, but also certain advantages in prices can be accepted by builders and consumers. Professor Yuan Xiao of the School of Architecture of Tsinghua University said: Actively promoting the development, production, and application of green building materials, we must first Recognize the interests of all parties involved in green building materials. In the green building materials market, there are many stakeholders such as consumers, development agencies, design agencies, and construction agencies. For example, consumers choose a green building because it can bring about a better living environment, thus improving the quality of life and work efficiency; the purpose of developers developing green buildings is that green buildings can bring more profits; architects design green buildings The purpose of the innovation is to bring about the development of the design market; the purpose of a city to promote green building is the environmental health of the city and the region, and the employment opportunities brought by the green construction industry. This requires the integration of the interests of various economic entities and the formation of joint forces in order to advance the development of green buildings.
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