China is actively promote industrialization and modernization construction, going along industrial developing road. New building industrialization can realize building energy conservation, environmental protection, the sustainable development of the whole life cycle value maximization of the new way of construction. Steel structure is a typical green building, which can use recycle material and has good seismic performance. Sustainable development and recycling thought reflected in all process such as steel structure building design, construction and demolition, all are green. Therefore, the steel structure is more suitable for the current industrial production and satisfy the assembly building development and demand, and more in line with the great development direction of our country.
China's steel structure is developing rapidly
At the present stage, in areas with good economic development, including Guangdong, Jiangsu, Zhejiang, Shanghai and Beijing, steel structures account for about 20% of the assembly buildings. China's steel structure has maintained rapid growth from 2012 to 2016. China's 13th five-year plan aims to double the amount of steel structure used in the country by 2020 from 2014 to 80 million tons to 100 million tons.
Xiaozhen Hu, senior engineer of national building engineering material quality supervision and inspection center
On the 2018 Jiangsu coating industry development BBS and coatings industry in Jiangsu province association conference, Xiao-zhen Hu, national construction material quality supervision inspection center senior engineer, give a speech around water paint market research (steel structure) , coating industry standard summary, coating industry standard revised standard interpretation, introduction of drafting standards, green coating and so on. The theme of the speech is China coating market research reports and coating of survey of new industry standards.
The strong recommendation of national policy on steel structure rapidly increases the proportion of steel structure in construction. "One Belt And One Road" drives the export of infrastructure construction, and overseas orders of steel structure construction rise sharply. The area of commercial buildings, transportation hubs and venues continues to grow steadily, driving the development of the steel structure industry.
The survey data in the report's show that the steel structure in our country get rapid development in recent years is not only a market driven, countries also released several policies to support the development of steel structure industry, which promote the development of steel structure building. Such as February 4, 2016, policy 《The state council's opinion on the elimination of overcapacity in the steel industry to achieve development》 requires vigorously promote and apply steel structures, in combination with shantytown renovation, dilapidated buildings renovation and earthquake resistant housing projects, pilot projects for the popularization and application of steel structures have been carried out to greatly increase the proportion of steel structures.
China's provinces have introduced measures to speed up the application of steel structure, such as Hebei requires that steel structures should be adopted in the construction of large-span industrial plants and storage facilities, and for the suitable new municipal infrastructure projects, the proportion of steel structure is more than 75%; Sichuan province requires all government investment projects in areas with seismic fortification intensity above 7 degrees to adopt steel structures, and public buildings with social investment need to be actively promoted and applied steel structures.
Along with the advancement of "One Belt And One Road", it drives along the road infrastructure construction, which brings new opportunities for the steel structure industry in our country. Our country enterprise to speed up the pace of walking out, One Belt And One Road promotes the internationalization of domestic enterprises.
“One Belt And One Road” involves the economic cooperation and development of 4.4 billion people in 65 countries, revealing the historic turning point of China's new economic growth and revival. The key to the promotion of “One Belt And One Road” is infrastructure construction, involving domestic cities and countries along the routes. Its huge potential market has attracted steel structure enterprises to go abroad to explore overseas markets.
Due to the good seismic performance of building steel structure, it is easy to build a long span, which is suitable for the construction of large buildings such as factory buildings, stadiums and high-rise buildings. At the same time, under the influence of the national and local governments on the promotion of prefabricated buildings, the future development of steel structure residential space is vast.
Sales of waterborne coatings for steel structures increased by more than double digits
The rapid development of steel structure has also led to the prosperity of steel structure coating market. At present, the steel structure coatings used in our country mainly include oil and water - based coatings. From 2012 to 2016, the sales volume of building steel structure coatings in China increased by 9.2%, and the sales growth is expected to exceed two figures in 2017-2021, Hu said.
Under the high requirement of national environmental protection, waterborne paint has been used in the construction of large landmark buildings in China in recent years, which has led to the trend of building design institute using waterborne paint. At present, the proportion of oil in steel structure coatings in China is still much higher than that of water based coatings, but the market share of water based steel structure coatings is gradually increasing. Hu said: since 2012, the sales and sales of steel structure coating have maintained double-digit growth, and the sales and sales growth after 2017 is expected to be higher than the ones before 2016, the water-based fire protection coatings will become the "leading role" of the market.
Waterborne steel structure coating primer mainly includes: water-borne epoxy zinc-rich, water-borne alkyd, water-borne acrylic acid, water-borne inorganic zinc-rich primer, and water-borne acrylic acid and water-borne alkyd paint. Waterborne building steel structure anticorrosive paint is mainly waterborne primer, which accounts for about 90-95% of the sales volume of water-borne steel structure anticorrosive paint.
National standards for steel structure coating development escort
To better promote the development of steel structure market healthy and orderly, the ministry, the ministry of finance, the ministry (now the ecological environmental protection), formulate relevant policies to promote transformation and upgrading of the steel structure coating.
In the 《Water-based anticorrosive coating for steel structures》 which released on April 28, 2017, it is required that the primer, intermediate paint VOC should be less than 200g/L, and surface paint VOC should be less than 250g/L. In the 13th five-year plan, VOC is also required to be included in the seven key industries (car, ship, container, furniture, construction machinery, steel structure and roll material production).
The industry standard 《Code for construction and acceptance of waterborne corrosion resistant coatings for steel structures in industrial buildings》（being set）
This standard applies to waterborne anti-corrosion coatings in the application of prefabricated industrial construction steel structure, the industrial construction steel structure with research, development, production and application of waterborne anti-corrosion coatings will play a role in promoting. To solve the problem of lack of standard in the process of waterborne anti-corrosion paint coating for steel structure of prefabricated industrial buildings, and to improve the coating technology and management level of water-based anti-corrosion coatings for steel structures in prefabricated industrial buildings, water - based corrosion - resistant coatings for steel structures in fabricated industrial buildings are specified.
It focuses on the application of water-based coatings that are environmentally friendly and green, and also on the centralized recovery and treatment of exhaust gas, which reduce VOC emission from water - based corrosion - resistant coatings applied in steel structures of fabricated industrial buildings. From the perspective of environmental protection green to this standard, in the application of steel structure anticorrosion coating of new products, industrial prefabricated building standardized coating construction technology and construction of new technologies to promote the development of waterborne anti-corrosion coatings.