What is the use of carbon fiber cloth in structural reinforcement? First of all, we must understand the characteristics of the carbon fiber cloth itself.

Characteristics of carbon fiber cloth

The carbon fiber cloth reinforcement method can be widely recognized, and its excellent performance is not switched. From the mechanical properties, the tensile strength of carbon fiber cloth can reach 8-10 times that of ordinary steel bars, but the weight is much lower than that of steel bars. The increase of the self-weight of concrete structures can be neglected during reinforcement. At the same time, the carbon fiber cloth has much better corrosion resistance and durability than the concrete structure, which can effectively improve the corrosion resistance and durability of the structure, and avoid the recurrence of concrete corrosion and durability after the conventional method is repaired.

In terms of construction, carbon fiber cloth reinforcement also has great advantages. The carbon fiber cloth is soft and can be applied to different structure types and shapes. After reinforcement, the original appearance of the member can be ensured to the utmost. The construction of carbon fiber cloth does not require wet work and large construction machinery, and can be constructed without affecting the normal production of the factory, avoiding economic losses caused by long-term shutdown. Compared with the traditional process, the carbon fiber cloth reinforcement method is simple in operation, high in construction efficiency, short in construction period, and easy to ensure quality, and has become a relatively mature construction process.
 
Application of carbon fiber cloth
 
The carbon fiber cloth reinforcement method can play different reinforcement effects for different components. Firstly, the higher tensile strength of the carbon fiber cloth can effectively replace or supplement the tensile properties of the steel bar by reinforcing the carbon fiber cloth to the bottom tension zone due to the reinforcement of the bending member, such as the beam and the plate, and improving the bending member. Carrying capacity. In addition, in the opening of the floor, if the hole is affected by the force of the plate, the carbon fiber cloth can be attached around the hole as a post-compensation rib for reinforcement.

On the other hand, carbon fiber cloth can also play a similar role as stirrups, and the concrete members are shear-reinforced. Shear reinforcement can be reinforced by gluing a carbon fiber cloth U-shaped hoop, or by affixing a carbon fiber cloth annular hoop perpendicular to the axial direction. In the shear reinforcement, it is necessary to pay attention to the structural measures of different components to meet the requirements, and the corners of the beam and the square column must be ground into an arc shape to prevent the stress concentration from affecting the mechanical properties of the carbon fiber cloth.

The carbon fiber cloth can also be used to strengthen the axial compression and the large eccentric compression member by means of a circumferential bundle or an axis attached to the tension edge. When the reinforced concrete ductility is insufficient and seismic reinforcement is required, carbon fiber can also be used. The cloth loop is reinforced in the manner of a bundle. For small eccentric compression members and walls, carbon fiber cloth can only withstand tensile stress and cannot withstand pressure, so it is not effective for the compression strengthening of the two.

It should be noted that the reinforcement of the carbon fiber cloth is to make the carbon fiber cloth and the concrete substrate form a common force together by the bonding action of the dipping glue, so as to achieve the reinforcing effect. That is to say, the dipping rubber has an intuitive effect on the final reinforcing effect. Different types of impregnating rubber may affect the life of the reinforcement system and the durability of the reinforcement system in complex environments. Therefore, in the reinforcement of structural safety, the choice of carbon fiber cloth and matching impregnating glue should be cautious.

It can be seen that carbon fiber cloth plays an important role in structural reinforcement.