Analysis and Prospect of New Building Material Waterproof Industry Situation

I. Analysis of Development Situation China's new building materials industry has developed with the continuous deepening of reform and opening up. From 1979 to 1998, it was an important historical period for the development of new building materials in China. After 20 years of development, China's new building materials industry has basically completed its development process from scratch and from small to large. It has formed an emerging industry nationwide and has become an important product category and a new economic growth point in the building materials industry. The rapid development of economic construction and the continuous improvement of people’s living standards have provided good opportunities and a broad market for the development of new building materials. It is expected that the proportion of new building materials in 1999 will account for nearly 20 percent of the total output value of the building materials industry. At present, the nationwide new building material companies are dotted with market demand and have formed a nation-wide organization-type building materials circulation network; most foreign products have been produced in China, and the new building materials required for three-star hotels have been able to Self-sufficiency; the development of decorative materials in different grades and different colors and varieties has provided material guarantees for improving the living conditions of urban and rural residents in China and changing the face of the city. China has formed a professional team of scientific research, design, education, production, construction and circulation of new building materials.

1. Development of new wall materials The development of new wall materials in China has been rapid. In 1987, the output of new wall materials was 18.45 billion standard bricks. By 1997, it had increased to 184.898 billion standard bricks, a 10 fold increase, and a new type of wall. The proportion of materials in the total wall material increased from 4.58 to 25.2.

There are many new types of wall materials, including bricks, blocks, plates, such as clay hollow bricks, clay bricks with non-clay, non-clay bricks, building blocks, aerated concrete, lightweight boards, composite boards, etc. In the wall material of the decision, the ratio of the base to the ground is still small. Only by promoting the rapid development of various new body materials in line with local conditions can we change the irrational product structure of wall materials, achieve energy conservation, protect cultivated land, use industrial waste residue, and promote building technology.

After the first 20 years of self-developed foreign production technology and equipment, China's wall material industry has begun to embark on the road of multi-species development, and initially formed a wall-based system, such as concrete hollow blocks. Blocks, gypsum plaster boards, fiber cement sandwich panels, etc., but the proportion of all kinds of light boards and composite boards representing the modern level of wall materials is still small, not more than the total amount of wall materials, and industrial development. Countries are 40 to 50 years behind. Mainly manifested in: low-grade products, small-scale enterprises, backward technology and equipment, poor ability to support. One of the important reasons for the slow development of new wall materials is the lack of restrictions on solid clay bricks, lack of specific measures to protect land resources, and the cost of making clay bricks at the cost of destroying land, making any type of new wall material at a price Can not compete with it. After the implementation of the new tax system in 1994, only 6 VAT was levied on clay brick production enterprises, while many new wall materials, especially lightweight plates, had to pay 17 VAT services, exacerbating the disadvantages of the development of new wall materials. situation. In view of this situation, the Office of Innovation of Wall Materials of the First and Third National Bureaus (Ministry of Construction, Ministry of Agriculture, Ministry of Land and Resources, and National Building Materials Bureau) actively instructed all localities to vigorously carry out renovation work on wall materials, and introduced a number of wall reforms in light of local conditions. Policies have effectively promoted the development of new wall materials.

2. Thermal Insulation Materials Before 1980, the development of thermal insulation materials in China was very slow. A few thermal insulation material plants can only produce small amounts of expanded perlite, expanded vermiculite, slag wool, ultrafine glass wool, and microporous silicic acid. Calcium and other products cannot meet the needs of national construction in terms of product variety, specifications, or quality. Compared with advanced foreign standards, they have fallen behind for at least 30 years. For example, before 1980, there were only 3 production plants of slag wool in China. The annual peace capacity is less than 10,000 tons. Only the single cotton variety of peace is available, and there are only 3 companies with calcium silicate thermal insulation materials. The annual output is about 8,000 cubic meters. Since the reform and opening up, China's thermal insulation materials have made considerable progress, has developed into a relatively complete varieties, the initial scale of the production of thermal insulation materials and technology systems. In 1996, the national output was about 800,000 tons, including about 200,000 tons of ore rock wool, about 40,000 tons of glass wool, about 50,000 foam beans, and about 6 million cubic meters of expanded perlite (about 450,000 tons). Other materials 60,000 tons. The main gap between China's thermal insulation materials and industrial developed countries is: 1 The largest user of thermal insulation materials in foreign countries is the construction industry, accounting for about 80 percent of production. However, the construction market in China has not yet been fully opened, and its application only accounts for 10% of production. 2 The overall level and management level of the production process need to be further improved, and the product quality is not stable enough. 3 The lack of scientific research investment, application technology research and product development lags behind, especially in the application of thermal insulation materials in construction research and development over the years has been slow, seriously affecting the healthy development of insulation materials industry. Strengthening the work on the design and construction of new thermal insulation materials and other new types of building materials is an urgent task for the development of a new type of built village industry.

From the above, we can see that after more than 30 years of efforts, China's insulation material industry, especially after nearly 20 years of rapid development, many products have grown from scratch, from singleness to diversification, and quality from low to high. Expanded perlite, mineral wool, glass wool, foamed plastic, fire-resistant fiber, calcium silicate thermal insulation products, etc., have relatively complete varieties of industries, technologies, and production equipment. The products have also reached the international advanced level in the 1990s. . However, as China's thermal insulation material industry is not late, the overall level of technology and equipment is low, and the application technology in the field of construction needs to be improved, which greatly affects the popularization and application of thermal insulation materials. In recent years, the repeated construction of insulation materials industry has been a serious phenomenon. Bugs have surged across the country. During the past few years, hundreds of production lines have been put into operation. However, investment in application areas has not been invested much, resulting in low investment efficiency and oversupply. situation.

3. Waterproof seal material Waterproof material is an important functional material required by the construction industry and other related industries, and is an important part of the building materials industry. With the rapid development of China's national economy, not only industrial buildings and civil buildings require multiple varieties and high quality requirements for defense materials, but also require high quality in industries and fields such as bridges, tunnels, defense and military industry, agricultural water conservancy, and transportation. Waterproof seal material.

Since the reform and opening up, China's building waterproof material has achieved rapid development. Waterproof material has got rid of the backward situation under the dominance of paper tar mats. At present, it has five categories including asphalt linoleum (including modified asphalt linoleum), synthetic polymer waterproofing membrane, building waterproof coating, sealing material, plugging and rigid waterproof material. product. In 1995, the output of new waterproof membranes was 42 million square meters, accounting for about 5 percent of the output of waterproof membranes. China's waterproof material has basically formed a waterproof material industrial system with complete categories, product specifications and grades, and technological equipment development that has begun to take shape. There are some foreign varieties that we basically have.

At present, compared with foreign advanced countries, China's waterproof materials have the following major problems: First, the product structure is irrational. At present, the production and use of new waterproof sealing materials are very small, and the paper felt still accounts for 95 of waterproofing membranes; The product quality is generally low, and fake and fair products flood the market. Third, design and construction application technology needs to be improved. Building leakage is still quite serious. The waterproof material industry needs to adjust its structure and regulate the market.

4. Decoration materials The variety of building decoration materials is very rapid. It is very fast and it is closely related to the improvement of people's living standards and living conditions. It is one of the varieties of building materials with great potential for development. Its variety, quality and supporting level determine the level of decoration of buildings, and it is of great significance to beautify the urban and rural architecture and improve people’s living and working environment.

Although the development of building decoration materials in China is relatively late, the starting point is relatively high. The main production capacity is developed after the introduction of foreign advanced technology and equipment after the 1980s. At present, there are more than 4,000 kinds of color varieties, which have basically formed an industrial system with initial scale and relatively complete product categories. In 1995, the annual output value of our country's decoration and decoration materials was about 40 billion yuan. From 1991 to 1995, the annual growth rate of China's decoration and decoration materials was 30 left. In 1996, the output of major products was: wallpaper, wall coverings 210 million square meters, plastic floor 36 million square meters, architectural coatings 650,000 tons, plastic pipes 90,000 tons, plastic doors and windows nearly 10 million square meters, and chemical fiber carpets 4.5 million square meters. At present, three-star hotel decoration and decoration to help their own production, four to five-star hotel decoration 30-40 can be self-sufficient. The main problems are: small scale production companies, unstable product quality, old models, low grades, poor matching, and weak market competitiveness; lack of scientific research and development force, and the ability to update and replace products can be weak, unable to meet market demand; The structure is irrational. The proportion of medium and low-grade products is large, and the proportion of high-grade materials is low, which cannot meet the demand for high-end building decoration.

Second, the development of new types of building materials and products is a requirement for sustainable development strategy For China where the per capita possession of resources such as energy and cultivated land is only 1/4 of the world average, the coordinated development of the national economy and society and resources and ecological environment is even more important. And urgently. At present, China's clay solid bricks still account for nearly 80 percent of the total output of wall materials. Problems such as high energy consumption, damaged fields, and pollution are very serious. Each consumes 2.2 billion tons of clay resources, destroys about 120,000 mu of land, and consumes energy. 82 million tons of standard coal, while emitting large amounts of dust and carbon dioxide. Therefore, the development of newspaper building materials and products related to the implementation of China's sustainable development strategy, but also related to the healthy development of building materials industry.

With the development of the national economy and the gradual improvement of people’s living standards, people’s demands for living and working fields have also continuously increased. The experience of many countries proves that it is an inevitable trend of economic development and social progress. The progress of the construction industry does not require that the quality and function of the building should be perfected, and that it must be beautiful and harmless to human health. This requires the development of versatile and efficient new building materials and products. Only in this way can they meet the requirements of social progress. The use of new building materials and products can significantly improve the functions of buildings, increase the area of ​​use of buildings, improve earthquake resistance, facilitate mechanized construction and increase construction efficiency, and can reduce construction costs in the same circumstances. Practices in cities such as Tianjin and Chengdu have proved that under the same conditions, the use of new building materials and products can increase the effective use of the area by nearly 10, reduce the weight of the building by more than 40, and effectively increase the ability to resist earthquakes. According to the new materials used in the 240 million square meters of residential buildings completed in the current year, the effective use area will increase by about 20 million square meters per year, and the overall cost can be reduced by about 4-7. In addition, the development of new building materials also has a significant effect on environmental protection and comprehensive utilization of resources.