Carbon fibers are also called carbon fiber reinforced composites. In the middle and late twentieth century, it was developed jointly by the developed countries in the west. At that time, it was mainly used in the aerospace industry. Later, with the popularization of technology, it was applied in civil engineering construction in the 1980s. After ten years of development, it became one of the important building materials in the construction industry in the 1990s.

Basic Principle of Carbon Fiber Wrap Reinforcement Technology

For the reinforcement of bridge buildings, the use of carbon fiber wrap should first be immersed in epoxy resin to form strong sheet materials. Then the epoxy resin is bonded in the direction of cracks according to the direction of force. When the component is subjected to tension load, the crack will not be further cracked along the direction of force through the role of fiber sheets. Thus, it can reinforce the main body of the building and ensure the stability of the structure at the same time.

Advantages of Carbon Fiber Wrap Reinforcement Technology

(1) Good chemical stability

Carbon fibers have very good waterproofing properties. It is found in the actual construction process that this material also has excellent performance in acid and alkali resistance and Fangzi exterior line. In the application process of different climatic environments, it also has corresponding advantages. Adding a layer of fire retardant paint can play a very good fire retardant effect.

(2) The material has light weight and high strength.

Carbon fiber material has the characteristics of light weight and high strength, and it is very important for the overall quality of buildings. While color painting is more convenient, it can also ensure that there are no obvious splicing marks outside the structure.

(3) Excellent mechanical properties

Carbon fibers have excellent mechanical properties. It can play an excellent role in the reinforcement of various structures. Especially its remarkable anti-fatigue effect has a very obvious effect on the repair of Engineering cracks, and satisfactory results have also been achieved in the tensile test.

(4) The construction procedure is relatively simple.

The construction process of carbon fiber is relatively simple. In some small-scale engineering construction applications, it has the characteristics of simple change and short construction period. Relevant data show that the application of this material can ensure the shortening of the construction period to a large extent, and at least 24% of the construction period can be shortened on the premise of the same amount of work.

Concrete Steps of Carbon Fiber Wrap Reinforcement Technology

In order to ensure its reinforcement and repair effect on the main body of the project, it is necessary to use the corresponding technical means to realize the standardization of the reinforcement construction process of carbon fibers. The following concrete steps should be paid more attention in the actual construction process.

(1) Construction preparation

(2) Surface treatment of concrete members

(3) Preparing and painting resin structural adhesives

(4) Sticking carbon fiber wrap

(5) Surface protection and surface treatment of carbon fiber cloth

Summary of Carbon Fiber Wrap Reinforcement

Generally speaking, with the rapid development of social economy in China, bridge engineering has entered a prosperous period, but the technology used in bridge construction in the past, in the requirements of modern engineering, obviously can not meet the requirements of modern transportation. However, the construction conditions at that time limited the quality of the bridge, in this case, strengthening the original main body of the bridge has become an inevitable choice. The emergence of carbon fiber materials provides a new way to solve this problem. Carbon fiber has the characteristics of high cost performance and low construction conditions. More noteworthy is that with the maturity of technology, the market price of this material shows a downward trend, which lays a certain economic foundation for the actual application of carbon fiber reinforcement technology in China.