Carbon fiber composite rebar used for bridge reinforcement

March 29, 2024

The density of carbon fiber composite rebar is much lower than that of steel reinforcement. For materials of the same volume, carbon fiber composite rebar has significant advantages in weight; The tensile strength of carbon fiber composite rebar is also greater than that of steel reinforcement, and its coefficient of thermal expansion is lower, indicating that the degree of expansion will be much lower at the same temperature.

The combined use of carbon fiber rebar and high-strength polymer mortar fully utilizes the tensile strength of carbon fiber rebar, the rapid setting strength of polymer mortar, and the approximate characteristics of the thermal shrinkage modulus of mortar and reinforced concrete structure. It can not only improve the bearing capacity of reinforced concrete structures, but also fully utilize the environmental characteristics of new materials, achieving a comprehensive effect of maintenance, reinforcement, utilization, and renovatio.

Carbon fiber composite rebar

For the Tanghuli Bridge in Yizhang County, Chenzhou, Hunan Province, due to issues such as cracks at the bottom of the beam and exposed steel reinforcement corrosion, corrosion-resistant, lightweight, and high-strength carbon fiber composite rebar was adopted for reinforcement. The Tanghuli Bridge has solved the problems of exposed steel corrosion and cracks through this reinforcement, without increasing the weight of the bridge or increasing its service life.

Construction of carbon fiber composite rebar