Carbon fiber reinforcement includes carbon fiber cloth reinforcement and carbon fiber board reinforcement. The research on carbon fiber materials used in the reinforcement and repair of concrete structures began in the developed countries such as the United States and Japan in the 1980s. China's technology started very late, but with the rapid development of China's economic construction and transportation industry, a considerable part of the existing buildings caused historical problems due to the low design load standards at that time. Some buildings are difficult to meet due to changes in the use of functions. The requirements of the current specification are in urgent need of maintenance and reinforcement. At present, there are many commonly used reinforcement methods, such as: increased section method, outer steel reinforcement method, bonded steel reinforcement method, carbon fiber reinforcement method, and the like. The carbon fiber reinforcement repairing structure technology is another new type of structural reinforcement technology after increasing the concrete section and sticking steel. technical standard The earliest adopted specification in China is the Technical Specification for Carbon Fiber Sheet Reinforced Concrete Structure in 2003, numbered CECS146:2003, which has been replaced by the latest National Standard Specification 2006 “Concrete Structure Reinforcement Design Specificationâ€, which is numbered GB 50367-2006. The most recent national standard for carbon fiber reinforcement is "Carbon Fiber Sheet for Structural Reinforcement and Repair" GB/T 20490-2008, which will be implemented on October 1, 2008.
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