Cfrp-steel concrete composite member cathodic protection device and preparation method thereof

Abstract

The invention discloses a cathodic protection device for a CFRP-steel-concrete composite component and a preparation method thereof, and relates to the technical field of reinforced concrete cathodic protection, mainly comprising: a CFRP pipe, concrete, steel and a power supply; the steel is arranged in the CFRP pipe; The concrete is poured in the gap between the steel and the CFRP pipe; the steel is electrically connected to the negative pole of the power supply, and the CFRP pipe is electrically connected to the positive pole of the power supply; when the steel is detected When corrosion begins, the power supply is turned on for cathodic protection. The cathodic protection device for CFRP-steel-concrete composite member disclosed by the invention and the preparation method thereof can make the electric field of the whole structure evenly distributed, and improve the durability of the whole structure.

Description

technical field [0001] The invention relates to the technical field of cathodic protection for reinforced concrete, in particular to a cathodic protection device for a CFRP-steel concrete composite component and a preparation method thereof. Background technique [0002] Now the most common cathodic protection method is a cathodic protection device with carbon fiber reinforced composite (Carbon Fiber Reinforced Polymer / Plastic, CFRP) longitudinal bars as the anode. The current makes the CFRP longitudinal ribs connect to the positive pole of the power supply, and the steel bars connect to the negative pole of the power supply. This structure uses the cathodic protection method to protect the steel bars from corrosion, improves the utilization rate of materials, and gives full play to the corrosion resistance, low consumption rate and long service life of CFRP longitudinal bars, as well as sufficient mechanical strength and reliability. High mechanical properties, greatly imp...

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Problems solved by technology

[0004] The main disadvantage of the above technology is that CFRP bars and steel bars are arranged alternately, and the electric field of the entire structure affects each other, resulting in the uneven distribution of the electric field and differences in durability, which affects the entire structure

At the same time, because the reinforced concrete structure, that is, the column structure, is a structure used to resist compression, it needs to bear the load given to it by the end, if the column structure is not designed properly, there will be bearing capacity problems, which will affect the durability of the structure

The CFRP tendon is a kind of tendon with high tensile strength but low compressive strength. It is a great waste of materials to be used in column structures, and will seriously affect the bearing capacity of column structures and other characteristics.

Therefore, the above existing cathodic protection methods are difficult to be applied to column structures, and the ductility and bearing capacity of concrete cannot be guaranteed.

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