1. Simple construction

Especially when the space inside the box girder is limited, the CFRP retrofitting method is a better method. The process is simple, without large equipment, formwork, fixture and support, the operation is simple and easy to operate, the working face of the construction is small, and the construction work is not limited in the same space.

2. Adapt to different shape of component

It is very difficult to use traditional methods to reinforce the inclined, curved, sloping and irregular structures. Carbon fiber fabric is very strong in shape, with carbon fiber reinforcement, it can be constructed with the shape of the structure arbitrarily, which can reduce the construction difficulty, reduce the construction cost and shorten the construction period, and can produce huge social and economic benefits.

3. No increase of the constant load and the size of the section

The weight of the carbon fiber fabric is light, and the weight of the adhesive material of the epoxy resin series is very light. It has little effect on the whole structure weight and the clearance under the bridge, which can be ignored. At the same time, the carbon fiber fabric can be pasted in multi layers. According to the requirements of reinforcement, CFRP can be overlapped and pasted in one place to meet the requirements of reinforcement.

4. Effectively sealing cracks in concrete

The carbon fiber fabric is attached to the surface of the concrete, which not only closes the cracks of concrete, but also the characteristics of high strength and high modulus also restrict the formation and expansion of the cracks in the concrete structure, change the shape of the cracks, make the wide and deep cracks become dispersed fine cracks, and raise the overall stiffness of the concrete members.

5. No damage to the original structure

The reinforcement system of carbon fiber fabric is pasted with epoxy resin series bonding material, without the need of anchoring bolt and drilling concrete, so it will not cause new damage to the damaged structure, and can also avoid new problems caused by the conflict between the original steel bar and the prestressed cable in the structure.

6. It does not affect the appearance of the structure

The thickness of the carbon fiber fabric is very thin, and the surface of the paste can also be painted with a coating that is consistent with the color of the original structure, so it does not affect the appearance of the structure.

7. Carbon fiber cloth (carbon fiber strip) has excellent chemical corrosion resistance

Carbon fiber cloth (CFRP) is a kind of composite material with almost no corrosion and magnetism, and has good heat resistance. It can not only withstand the erosion of cement alkaline, but also has a long life when it is often used in corrosive environment such as salt damage. Therefore, CFRP reinforcement method can show its superiority in other unfavorable ways.