The carbon fiber reinforcement method is convenient when the construction is carried out, the operation method is simple, the construction period can be well controlled, and no large-scale construction equipment is needed during the construction, so that the construction will not be limited by space, and at the same time, traffic Will not have a great influence. Bonding the carbon fiber cloth with excellent tensile properties to the location of the cracks can effectively improve the carrying capacity of the original structure, and at the same time can improve the performance of the bridge. Bonding of carbon fiber cloth in the direction of the main stress of the bridge can better improve the performance of the bridge. During the pasting, the concrete surface cracks must be restrained, which can prevent the concrete from showing more cracks and avoid more problems during construction. In addition, improving the bending stiffness of concrete can better improve the stress of the bridge structure.

Carbon fiber reinforced construction process points: 1, the use of high-quality binders for building structural reinforcement of carbon fiber material has excellent mechanical properties, but after the carbon fiber material is woven into carbon fiber fabric, each of the carbon fiber filaments is difficult to fully work together, At lower loads, the carbon filaments gradually break until they are destroyed. After the binder is used, the carbon fiber filaments can work well together, and the tensile strength of the carbon fiber cloth is greatly increased. Therefore, the carbon fiber reinforcement must first make the carbon fiber filaments in the carbon fiber cloth work together. Therefore, the binder plays a key role in the reinforcement of the carbon fiber cloth. It is necessary to ensure that the carbon fiber filaments work together and at the same time ensure that the carbon fiber cloth and the structure work together.

2. The surface of the concrete surface underwent surface degradation, such as shedding, hollowing, honeycombing, corrosion, etc., should be removed. The substrate treatment is clean, and it is easy for the adhesive to bond firmly with the surface. For a large area of ​​inferior quality, epoxy mortar is used for repair after removal. Using concrete angle grinders, sandpaper and other equipment to remove loose materials, oil and other debris on the concrete surface, the concrete on the base of the component should be polished smooth. The concrete surface is best wiped with cotton wool and acetone, if there is water leakage to stop water, water and other treatment, the surface of the reinforced structure directly affects the quality of the reinforcement.

3, the configuration of the base rubber according to the mix ratio, the main agent: curing agent = 3:1 to configure the primer. The main agent and curing agent are placed in a container and measured with a spring balance, and the electric stirrer stirs uniformly. According to the actual temperature of the site, the dosage is determined and the time of use is strictly controlled. Generally, it is used within 20-50 minutes.

4. Carbon fiber cloth paste and control First, cut the carbon fiber cloth according to the design requirements, and then prepare the impregnated glue solution. Then evenly apply it on the part to be pasted. The leakage brushing phenomenon is strictly forbidden. Special attention should be paid to pasting the edge of the carbon fiber. Then stick the carbon fiber cloth, and try not to let the air into the paste. After confirming that there is no error in the pasted part, use a scraper to repeatedly roll in the direction of the fiber to remove air bubbles, and make the adhesive fully penetrate the carbon fiber cloth, and apply the adhesive on the surface of the carbon fiber cloth with a scraper to make it uniform.

5. The surface of the carbon fiber cloth after the reinforcement of the finished product protection and non-conforming product shall be protected by plastering or fire-spraying fire-retardant paint. After the completion of the construction site acceptance to assess the quality of the bond between the carbon fiber cloth and concrete, using a hammer and other tools to gently hit the surface of the carbon fiber cloth to determine the bonding effect by echo.

Carbon fiber cloth has many good characteristics. At the same time, it will not corrode during use, and it has good heat resistance. After use, it has very good environmental adaptability. This kind of material is relatively stable in terms of chemical properties. Therefore, it will not be affected by chemical substances after construction and it will have good durability after use. Therefore, no other problems will arise during the use of the bridge. After the use of carbon fiber cloth, it will not be greatly affected by external materials, even if there is a large natural disaster will not have a great impact on its structure, so it has been widely used in construction.

Carbon fiber reinforced features: 1, high tensile strength. The excellent physical and mechanical properties of carbon fiber materials can increase the bearing capacity and ductility of concrete structures and components, improve their mechanical properties, and achieve the purpose of high-strength reinforcement and repair.

2, light weight, basically do not increase the structural weight and cross-sectional dimensions. And flexible, easy to cut, a wide range of applications;

3. After the reinforcement, the corrosion resistance and durability of the structure can be greatly improved. Experiments show that the carbon fiber reinforced concrete structure can resist the corrosion of structures, which is often encountered by buildings;

4, the construction period is short;

5, the construction is convenient. It does not require large-scale construction agencies and turnover materials, and has no wet operation. It has a small construction site and good economy.
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