As the aging phenomenon of engineering structures continues to intensify, as well as the erosion and destruction of complex environments and disasters, more and more structures are in urgent need of reinforcement due to the decline in strength and durability. The traditional reinforcement method, whether it is to reduce the use space, affect the appearance of the structure, or have a large self-weight and increase the structural burden, will bring certain limitations to the structural reinforcement. Carbon fiber reinforcement can effectively avoid the disadvantages of conventional reinforcement methods, and is gradually becoming the most popular method in structural reinforcement.

Carbon fiber characteristics

Carbon fiber reinforcement method can be widely recognized, and its excellent performance is inseparable. In terms of 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 in the weight of the concrete structure during reinforcement is basically negligible. At the same time, the corrosion resistance and durability of the carbon fiber cloth are far superior to the concrete structure, which can effectively improve the corrosion resistance and durability of the structure, and avoid the occurrence of concrete corrosion and reduced durability after traditional methods of repair.

In terms of construction, carbon fiber cloth reinforcement also has great advantages. Carbon fiber cloth is soft and can be applied to different structural types and shapes. After reinforcement, it can ensure the original appearance of the component to the maximum extent. Carbon fiber cloth construction does not require wet work and large construction machinery, and can be constructed without affecting the normal production of the factory to avoid economic losses caused by long-term shutdown. Compared with the traditional process, the carbon fiber cloth reinforcement method has simple operation, high construction efficiency, short construction period, and easy quality assurance. It has become a more mature construction process.

Application of carbon fiber

The carbon fiber cloth reinforcement method can play different reinforcement roles for different components. First of all, the higher tensile strength of carbon fiber cloth can be due to the reinforcement of bending members. For example, beams and slabs can effectively replace or supplement the tensile performance of steel bars by pasting carbon fiber cloth to the bottom tensile zone, and improve the bearing capacity of bending members. In addition, in the opening of the floor slab, if the impact of the opening on the slab is small, carbon fiber cloth can also be pasted around the opening as a supplementary reinforcement for reinforcement.

On the other hand, carbon fiber cloth can also play a role similar to stirrups to strengthen the shear of concrete members. The shear reinforcement can be strengthened by sticking carbon fiber cloth U-shaped hoops to the beam, or by sticking carbon fiber cloth ring hoops perpendicular to the axis direction to the column. It is necessary to pay attention to the structural measures of different components in shear reinforcement. At the same time, the corners of the beam and the square column must be polished into an arc shape to prevent stress concentration from affecting the performance of the carbon fiber cloth.

The carbon fiber cloth can also reinforce the axial compression member and the large eccentric compression member by means of hoop encircling or sticking to the tensile edge along the axis, respectively. When the ductility of reinforced concrete is insufficient and earthquake-resistant reinforcement is required, it can also be reinforced with carbon fiber cloth in the form of circumferential beams. For small eccentric compression members and walls, the carbon fiber cloth can only withstand the tensile stress but not the pressure, so the compressive reinforcement of the two is ineffective.

Horse carbon fiber

Horse Construction is a leading manufacturer of unidirectional carbon fiber fabric in China. 

Key Features of Horse CFRP Wrap

• Flexible 
• High strength 
• High modulus 
• Easy to install
• Long shelf life 
• Light self weight 
• High toughness 
• Anti high temperature
• Environmental-friendly 
• Carbon fiber wrap used for shear strengthening, confinement strengthening, flexural strengthening