Fiber reinfroced polymer(FRP) strengthening is used epoxy resin esternally bonded carbon fiber fabirc to reinforce the structure, then form a new complex, make the bonding material and original reinforced concrete joint stress, increase the structure's crack resistance or shear capacity, and improve the strength, rigidity, crack resistance and elongation of the structure.

Why is CFRP reinforcement more and more popular among engineers? That is because CFRP reinforcement has obvious advantages compared with traditional concrete structure reinforcement technology.

-The self weight of CFRP is only 200~300 g / m2, the design thickness is 0.111 - 0.167mm, and the self weight of epoxy resin is also very light, which has no effect on the whole structure weight and under bridge clearance, and does not affect the original structure appearance.

-Carbon fiber material has excellent physical and mechanical properties and high tensile strength, which is 4-8 times that of ordinary steel. It is very suitable for reinforcement concrete structures.

-The carbon fiber cloth is soft and can be cut freely. It is suitable for all kinds of components, and can be tightly bonded with the reinforced concrete surface. The quality of the construction is easy to guarantee, and there is no need to interrupt traffic.

-Carbon fiber reinforcement does not produce new damage to the original structure. CFRP reinforcement does not require anchorage and excavation of concrete. Therefore, it will not cause any new damage to the damaged structure, but also avoid the new problems arising from the conflict between the original reinforcement and prestress during drilling.

-The thickness of CFRP is small, which does not increase the dead load of the original structure. It is especially suitable for strengthening and strengthening under the condition of high building height, and does not increase the dead load and section size.

-Carbon cloth is pasted on the surface of concrete, not only closed the crack of the concrete, the high strength and high modulus characteristics also constrains the generation and expansion of cracks in concrete structures, change the shape of cracks, the crack width and depth of cracks become dispersed, thereby improving the overall stiffness of the concrete member.