steel construction can't ignore the use of fire retardant coating Although now a lot of buildings will use steel structure framework for building. But because of the special steel material performance, a lot of time need to pay attention to the anticorrosion properties. So fire coatings used insteel structure engineeringIn the middle, is a necessary process.
Fire coating for steel structure building put on and who Protective clothing and throughout
Steel structure building with rapid economic development, China construction steel structure since the 1990 s to get more and more widely accepted and used. modernsteel structure engineeringChina is the important content of large-scale modern buildings. Due to the steel structure has its light dead weight, basic low cost, suitable for soft foundation and easy to install, construction fast, the construction period is short, less pollution, good resistance to shock, and other comprehensive advantages, so steel structure building by the ministry of construction as promotion project. But in recent years, steel structure building fire accident frequency, the CCTV new site fire event for people again was a wake-up call.
China construction metal structure association XueFa senior experts believe that steel structure building fire prevention is always the focus industry experts, China's steel structure building fire protection technology has advanced foreign, at present widely used method is: putSteel structure fireaint coating in steel component surface, with a view to play a fire insulation protection, prevent the steel products in the fire temperature quickly and reduce intensity, avoid steel structure lose support ability and lead to building collapse. At present,Steel structure fireaint the research, production and application of more and more be taken seriously.
As we have learned, our country fireproof paint production enterprise after twenty years of development has begun to take shape, the production enterprise development to 250 above, but in many of the fireproof paint production enterprise, enterprise scale, management level and technical level is uneven, the high quality product rarely. In many production enterprises, only more than half of the enterprise through the ISO9000 quality system certification. The survey found that the domestic market sales of fireproof paint products are common problems: fire performance low, easy to fall off, decorative poor, poor durability and quality is not stable.
At present, the domestic steel structure building more, in order to achieve fire requirements, the owner may not have the imported steel structure fire retardant paint, using imported fireproof paint though can achieve fire requirements, but nearly 70000 yuan 1 tons of cost price let builders pain in the neck. For fireproof paint is concerned, the key lies in the reasonable formula and production process.
Construction steel structure corrosion nots allow to ignore
After years of development, at present, the steel structure building industry vigorous development, however, the relevant laws and regulations, standards and the promulgation of the relative lag, in recent years in the steel structure building and many problems in, such as the 1998 in zhejiang happen tens of thousands of square meters of light steel plant and individual network engineering collapse accident; Somewhere a span of 70 meters of space truss structure engineering, after five years use suddenly overall collapse. The accident in addition to design, production, installation problems outside, steel structure corrosion is a very serious problem.
XueFa said,steel structure engineeringThe owners, users, design and construction of the enterprise on the steel structure of the protection problems are the lack of enough attention, in consciousness still stay in the traditional anti-corrosion technology. Due to the material and construction technology choice improper, often causing premature steel structure corrosion or damage. At present, whether project owners, users or constructor for construction how to detect the performance of anticorrosive coating, basic downplay. In addition, some engineering owner completely according to graph and decide, in the project before start, did not find special anticorrosive engineering experts to evaluate the whole engineering anticorrosion scheme, no delegate professional anti-corrosion construction engineer or experts to anticorrosive coating for strict inspection, all to the project supervision. Project supervision on corrosion resistance of comprehension is also according to graph and decide, project delivery after use basic no corrosion maintenance detection, and regardless of the actual conditions of the large cut the cost of the anticorrosion engineering, all of these make steel structure life shortens greatly. Comprehensive of the world to the steel structure building protection practice proof, with heavy anti-corrosion coatings and be carried out anti-corrosive coating with fire anti-corrosion coatings on fire anti-corrosion coating is the most economic and effective, the most simple and practical, the most popular a kind of method.
Construction steel structure to improve the long-term protection technology
XueFa think, the steel structure anticorrosion technology, especially long-term anticorrosion technology is very important. Anticorrosion design life is 30 years, according to the different environment of indoor and outdoor use different anticorrosion coating. In fact coating system is made up of two different structure coating combination and become, include electrochemical protection of zinc rich primer, scaly natural cloud iron mainly intermediate paint, paint a skeletal support function and shielding performance is remarkable. Epoxy paint have good adhesion, abrasion resistance, water resistance, resistance to chemicals, other varieties coating have far more.
At present, the countries all over the world to building fire problem has certain value and introduced the corresponding fire safety requirements. Such as the United States two layer below the lower house refractory limit is 30 minutes. For fire rating requirements, according to different actual situation, each country has its own standard. Will China's actual situation, combined with the overseas experience, XueFa advice, because the Chinese property concept is stronger, in the fire, people not only to escape, and fire, rescue property, this would be a waste of time. So to make the residence with steel structure specification cannot copy foreign standards, and combined with the actual conditions in China work out suitable product standard.
In short, steel structure building to be popular in China, but also need to solve the technology and production process of the many problems, especially in fire anti-corrosion, should further increases the research and development dynamics, steel structure building as soon as possible to solve the problem of fire.
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