Development history of the hottest glass fiber rei

Development history of glass fiber reinforced polymer reinforcement technology in the 1990s, the U.S. government spent a lot of money every year to repair bridges damaged by insufficient durability. Britain spent as much as 200000 pounds every year to solve the corrosion and protection problems of reinforced concrete structures in the marine environment, while Shinkansen in Japan had concrete cracking, denudation and other phenomena within less than a decade of its use, The disadvantages of reinforced concrete buildings have caused problems in the use of many engineering projects

glass fiber reinforced polymer reinforcement was first produced in the United States. In the 1960s, the United States took the lead in developing and producing glass exclusion methods: replace oil fiber reinforcement with suitable viscosity and use it in concrete structures. By the 1980s, Japan, the United States and European developed countries began the application and R & D projects of glass fiber reinforcement materials in Colleges and universities and scientific research institutions. Glass fiber reinforced polymer reinforcement is applied to concrete structures. Its greatest advantage is high strength and corrosion resistance. It not only solves the corrosion problem of reinforcement, but also improves the service life of buildings. It is also widely used in other industries

the difference between glass fiber reinforced polymer reinforced continuous wall and reinforced concrete continuous wall

with the increasingly standardized research and application of glass fiber reinforced polymer reinforcement, countries all over the world began to pay attention to the use of this material in practical projects. In China, the durability problem of concrete engineering is becoming increasingly prominent. According to statistics, China has 1million bridges, of which 100000 are dangerous bridges. The bridge collapse accidents that occur every year cause huge casualties and property losses. On July 18, 2014, the cornice collapse accident in Luohu, Shenzhen caused 3 deaths and 12 injuries. According to the preliminary judgment of experts, the main reason for the accident and the 100000 square meter outdoor exhibition area was the corrosion of the reinforcement of the cornice support, coupled with the rainstorm, which caused the destruction of the reinforcement, which led to the accident

in 2010, China issued GB "technical code for application of fiber reinforced composite materials in Construction Engineering". Since then, the application of glass fiber reinforcement in civil engineering has begun to step on the right track. In 2011, gb/t fiber reinforced composite bars for structural engineering was issued, and jg/t fiber reinforced composite bars was issued in 2012. The promulgation of these specifications and standards has made the R & D, production and use of glass fiber bars in China more standardized

fiber reinforced composite is a material formed by high-performance fiber, synthetic resin matrix and curing agent with appropriate molding process. High performance fiber is the reinforcing material and synthetic resin is the matrix material. Fiber has high tensile strength and is the main provider of the strength of fiber-reinforced composites. It mainly plays the role of bearing load, which is mainly divided into carbon fiber, aramid fiber, basalt fiber, glass fiber and so on. The physical properties of matrix materials can affect the physical properties of fiber-reinforced materials by bonding and transferring shear

glass fiber reinforcement is a kind of fiber-reinforced composite material, which has the characteristics of light weight, high strength, corrosion resistance, easy cutting and non-magnetic. It has been widely used in pavement of pavement and bridge deck, foundation pit construction, coastal engineering, tunnel construction with new method, TBM method, CT room and so on. In China, the development prospect of glass fiber reinforced bar is good, and many companies have begun to produce this material. However, due to certain loopholes in market management, a large number of unqualified products flow into the project, resulting in huge potential safety hazards. When purchasing, we should pay attention to the inspection of manufacturer qualification and product quality. Shanxi chengxinda mining equipment Co., Ltd. is an enterprise specializing in the production of glass fiber reinforced bars. The main reason for its production is that it is solid, easy to use and simple. The production process is in strict accordance with the relevant national regulations and standards, and the quality of the ex factory products is guaranteed. To judge whether the quality of the glass fiber reinforced bar is good, we can first analyze it from the appearance. The surface texture of the threaded rod body of the glass fiber reinforced bar should be uniform, free of bubbles and cracks, and its thread shape and pitch should be neat without damage. Secondly, it can be analyzed from the test data of a few products produced in waste plastic recycling plants. The nominal diameter, tensile strength, shear strength, torque, antistatic property, flame retardant property and so on of the products should meet the national standards