钢筋混凝土结构加固改造技术（Reinforcement and reconstruction technology of reinforced concrete structure）.doc

钢筋混凝土结构加固改造技术（Reinforcement and reconstruction technology of reinforced concrete structure） Reinforcement and reconstruction technology of reinforced concrete structure Carbon fiber reinforcement technology: Carbon fiber cloth reinforcement technology is the use of carbon fiber cloth and special structural adhesive to strengthen the building components. The strength of the carbon fiber cloth used in this technology is about 10 times of that of the ordinary two grade steel. The utility model has the advantages of high strength, light weight, corrosion resistance and durability. The thickness is only about 2mm, basically not increase the section of the component, can ensure the carbon fiber cloth and the original component work together. 1 carbon fiber introduction: Carbon fiber is mainly divided into polyacrylonitrile (PAN) based carbon fiber and pitch based carbon fiber according to the different materials and production methods. Carbon fiber products include PAN based carbon fibers (high strength) and pitch based carbon fibers (high elasticity type). 2, epoxy resin: Different types of resins also ensure that they have a good penetration of concrete, such as base coated resins, and the bonding of carbon fiber sheets to concrete structures, such as epoxy resins. (1) brief introduction of epoxy resin Only rely on the carbon fiber sheet itself does not give full play to its strong mechanical properties and excellent durability, only the carbon fiber sheet is adhered to the surface of reinforced concrete structure and closely together composed by epoxy resin, in order to achieve the purpose of reinforcement. Therefore, the performance of epoxy resin is one of the important keys. Epoxy resins have different properties due to their different types and are adapted to different requirements of different parts. For example, the bottom coating resin has a good penetration of concrete, can penetrate to a certain depth of concrete; carbon fiber paste epoxy resin easy to through