Application development
Building structural adhesive because of its excellent performance, widely used in construction, installation, decoration, sealing, bonding agent, in areas such as structure in the construction industry is a pillar industry of the priority development of our country, our country building adhesive on no matter on varieties and yield have been rapid development.
The development direction of modern architecture design will be standardized and the prefabricated construction mechanization, components, and building materials of lightweight, high strength, and more functional. And the building structural adhesives are widely used, will accelerate the process of the four modernizations, and improve the construction speed and beautify building, improve the construction quality, save time and energy, environmental protection, reduce pollution and so on has important significance in many respects, so building adhesive has become one of important chemical building materials.
Development history
Building structural adhesive starts late, develops very fast. The emergence of building structural adhesive is in the early 1980 s. In 1978 by the French assistance of liaoyang chemical fiber factory load-bearing beam of a substation building, due to insufficient design reinforcement, buildings built after a few root crack of beam, after France France west card drew 31 # building structural adhesive, paste the steel plate at the bottom of the beam reinforcement, repair the crack, achieve the intensity of the original design, make its restore normal use function, received the province, the provincial capital, reliable and safe effect. Then in 1980, the ministry of construction officially issued "building structural adhesive technology development and application promotion", by dalian institute of chemical physics, Chinese academy of sciences and the liaoning building at the institute for scientific research. Completed the project in 1983, developed the first practical JGN type building structural adhesive in our country, to fill the gaps in China in strengthening the reinforcement material.
The market to promote
Markets need to promote the use of JGN type promotion research building structural adhesive in 1983 identified soon, take this topic of the unit, dalian institute of chemical physics and liaoning institute of building science namely reinforcement construction and various engineering trial and promotion work. Because of structure reinforcement in applying this glue adhesive, not only make the reinforcing component reach or exceed the original design level, improve the strength, stiffness, stability and integrity, can prolong service life, safe and reliable, and simple, short time limit for construction and save time and money, it also has does not destroy the original structure, do not take up space, strengthening external beauty, after sealing leak proof and multiple functions such as anticorrosion, and soon all aspects of the interest. Make reinforcement technique is able to rapidly popularized in China. The development of the new reinforced material is power to promote the development of reinforcement technique. The development of detecting technology relies on the development of test instruments, strengthening the development of technology depends on the development of new materials. By light weight, corrosion resistance, high temperature resistance of new materials of good effect, easy construction, composed of strengthening methods can promote the development of reinforcement material, reinforcement and improvement of theory is the prerequisite of strengthening technology development. The reinforcement is basically a low bearing capacity for structure and component, the lack of from the grasp of the overall structure and criterion, such as seismic design of buildings in the conceptual design, strong column weak Liang Jiang node in the design of concrete structures. After reinforcement component bearing capacity increase, the problem such as fire rating dropped dramatically. These issues need to be on the whole, by the increase of the reinforcement theory to solve the reinforcement and the improvement of technology in improving construction technology and construction machinery,
In 1996, the production of 1.33 million tons of adhesive in our country, including building adhesive for 400000 tons; Adhesive capacity of 2.43 million tons in 2000, the building adhesive nearly 700000 tons, accounting for one-third of synthetic adhesive; By 2005 adhesive is expected to 3.54 million tons, building adhesive about 1.1 million tons. Its product structure will also have a larger change, the biggest change is the adhesive used for building structure, strengthening and maintenance of building adhesive to growth in the past three or four years with more than three times, and will further expand the application field. Predictably, although such analysing development time is not long, but the fastest growth rate, the glue will enter a new period of development.
The situation in the mid - 1980 - along with our country reform and open policy, the rapid development of construction industry, at the same time there are still a lot of old buildings need maintenance and renovation, such as the ministry of metallurgical industry need to reinforce the old plant reached 300-4 million square meters. There are some new buildings also because of the change of use, defects, reconstruction and reinforcement is required, this time the market demand of greatly promote the popularization and application of building structural adhesive. In 1985, our country all the year round building structural adhesive has dozens of tons, to 1990 has reached hundreds of tons, and because of the needs of the market, in addition to strengthening with building structural adhesive, also appeared a long pile extension building structural adhesive and repair adhesive for repair. Building structural adhesive production surge and enrich the varieties, not only into a rapid development period.
Structure type
Building structural adhesive in the first place in the original research unit of dalian institute of chemical physics formation series, in addition to the original JGN - I, JGN - type II, type and repair, metal bonding, heat resistance, etc. In recent years, chongqing star rubber industry and etc.counties ChengHua chemical launched one after another good performance of building structural adhesive series, actively participate in the development of the western region and around the country building reinforcement and maintenance. The building structural adhesive varieties covers all aspects of the construction field. Also developed such as anshan iron and steel company JC - type I, Beijing metallurgical construction research institute YJS - type I, suzhou concrete products by ET, wuhan institute of water conservancy electric power WSJ, jiangsu kunshan huili institute of JGN - WL, Shanxi Province jianke courtyard JGN - 8, Beijing Oriental machinery company DJR series of construction structural adhesives, shenzhen Hu pearl adhesive series. Company of building structural adhesive in wujiang, Shanghai, xiamen, ZL type of building structural adhesive and wuhan set on shipping two research institutes of short pile extension building structural adhesive, etc., foreign flora gains. Fischer. Love of other top brand. Liaoning lushun field sampling analysis shows that the plants pasting steel plate of warships JGN shear strength did not decline, only slightly increased. Experience from abroad, the United States since the 30 s of the 20th century is not yet any aging; French west card toure structural adhesive, also did not appear any problems since the 60 s; Sydney opera in 74, the application of stick steel strengthening method is still without any problems, many successful experiences to make most identified with the architect JGN, familiar with the method of sticking steel. In application technology, brand, quality is gradually mature, to a higher level of development.