The reason why the carbon fiber reinforcement technology is so widely used in the maintenance and reinforcement of bridge cracks in China at this stage is that it has strong irreplaceable, that is to say, some bridge cracks cannot be repaired and strengthened by other reinforcement technologies. The main advantages of carbon fiber are that it does not affect the original structure of the bridge body, the construction process is simple, the reinforcement effect is excellent, and the chemical properties are stable and adaptable. The following will analyze its advantages in sections.

Does not affect the original structure of the bridge body

When strengthening the bridge, it is generally not allowed to change the original structure of the bridge body, because the original structure of the bridge body is the structure that is finally determined to be the most suitable for the local actual situation after layer by layer review. Therefore, if the bridge structure is changed and destroyed casually, even if it can repair the cracked bridge area, it can not guarantee the final quality and stability of the bridge to meet the expectations. The carbon fiber bridge reinforcement technology will not change the original structure of the bridge body in the application process. This is mainly because the carbon fiber is a material with physical properties, its weight is relatively low, and in the application process, its thickness will be processed to 0.112~0.168 mm in the later stage, so it will not change the original structure of the bridge body.

Convenient for construction

Compared with other reinforcement technologies, the construction process of the carbon fiber reinforcement technology is relatively simple, because the weight of the carbon fiber material itself is small, so it will not bring too much pressure to the construction personnel during the construction process. Only its operability is strong. As long as the actual construction personnel have a comprehensive understanding of the carbon fiber reinforcement technology and can operate in strict accordance with the specified process, the important role of carbon fiber reinforcement technology in bridge reinforcement can be fully played. At present, most construction teams in China encounter the problem of high difficulty in indoor operation when carrying out bridge reinforcement. The reasonable application of carbon fiber materials can effectively reduce the difficulty of this link, not only ensure the final construction efficiency, but also save space and reduce construction costs.

Excellent reinforcement effect

The ultimate purpose of the bridge reinforcement technology is to repair the problems of the bridge, so as to improve the stability and final quality of the bridge. Therefore, the reinforcement effect is an important indicator to measure the application efficiency of the reinforcement technology. Compared with other reinforcement technologies, the carbon fiber reinforcement technology has strong physical and mechanical properties in the application process and is irreplaceable. In the aspect of beam reinforcement, carbon fiber reinforcement can effectively prevent the crack propagation at the bottom of the concrete beam, reduce the deflection of the bridge beam, and enhance the flexural strength at the bottom of the bridge.

In terms of pier reinforcement, the pier can be repaired by wrapping the pier with prestressed carbon fiber cloth, which can effectively improve the bearing capacity of the pier and enhance the stability of the pier. Compared with the traditional steel plate reinforcement, the quality is lighter, the construction is more convenient, and the later is easy to rectify and maintain. If carbon fiber and concrete can be organically combined and the bridge can be strengthened by both, then its own strength and modulus can be maximized, so as to maximize the overall bearing capacity of the bridge components.

Stable chemical properties

Carbon fiber is a material with physical properties, so its chemical properties are relatively stable. In the development and research of bridge reinforcement for many years, the chemical properties of the reinforcement materials used in other reinforcement technologies explored by relevant personnel fluctuate greatly, and the unstable chemical properties easily make these materials react with acid, alkali, salt or cement when they meet, and finally affect the reinforcement effect, affecting the durability and corrosion resistance of the original materials. The chemical properties of carbon fiber are stable, and it will not react with other substances too strongly without accidents.

Strong adaptability

Carbon fiber material is a typical and common flexible material in China at this stage. Therefore, if carbon fiber needs to be applied in the construction process, carbon fiber can be assembled or cut at any time according to the actual situation of the bridge. This advantage is not possessed by many other processing materials. At present, there are more and more types and quantities of bridges in China. The performance and shape of reinforcement materials required for different types of bridges are different when different problems occur. If traditional reinforcement materials are used, they may not be able to adapt to some special bridge reinforcement operations. Carbon fiber, with its unique flexibility, has become an important material in bridge reinforcement, and is widely used in various bridge reinforcement operations.