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CFRP-embedded-anode reinforcing-steel-bar-concrete cathode protection method and device

A reinforced concrete and cathodic protection technology, which is applied in the field of reinforced concrete cathodic protection, can solve problems such as troublesome construction, high energy consumption, and difficulty in guaranteeing bonding strength, and achieve the effects of reducing engineering costs, high bonding strength, and simple construction

Active Publication Date: 2017-01-04
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, this invention requires secondary operations during construction, and the construction is troublesome; because of the need for secondary processing, the bond strength between the anode material and the concrete is difficult to guarantee, and the synergy between the anode material and the concrete is not good; the anode material and the cathode material The thickness of the concrete between (reinforcement bars) is large, the resistance between the cathode and the anode is large, and the energy consumption is large

Method used

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  • CFRP-embedded-anode reinforcing-steel-bar-concrete cathode protection method and device
  • CFRP-embedded-anode reinforcing-steel-bar-concrete cathode protection method and device
  • CFRP-embedded-anode reinforcing-steel-bar-concrete cathode protection method and device

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Embodiment 1

[0032] The concrete structure of embodiment 1 single-layer reinforcement is as figure 1 and figure 2 As shown, for a reinforced concrete structure with single-layer reinforcement, when the structure is poured (or component prefabrication), CFRP composite stress bars are arranged at intervals between the common steel bars, and then the CFRP composite stress bars and ordinary The steel bars are connected in parallel, and the CFRP composite stress bars are connected to the positive pole of the DC power supply, and the ordinary steel bars are connected to the negative pole of the DC power supply to form a cathodic protection circuit; Ordinary steel bars are arranged with one CFRP composite stress bar), or they can be arranged every two (every two ordinary steel bars are arranged with a CFRP composite stress bar). After electrification, the charge (electrons) flows from the negative pole of the DC power supply to the common steel bar (cathode electrode) through the wire, which ma...

Embodiment 2

[0034] The concrete structure of embodiment 2 multi-layer reinforcement is as image 3 and Figure 4 As shown, for reinforced concrete structures with multi-layer reinforcement, in the process of pouring concrete (or component prefabrication), the carbon fiber wire-CFRP composite stress bars formed by connecting CFRP composite stress bars with continuous carbon fiber wire mesh are pre-embedded in the outer layer of the concrete structure. The number and spacing of the carbon fiber-CFRP composite stress mesh and the ordinary reinforcement layer can be adjusted according to the load on the structure and the change of environmental conditions. Due to the anode system of this device, the continuous carbon fiber wire-CFRP composite stress-reinforced mesh, and ordinary steel bars are directly installed on the structure before concrete pouring, which reduces the cathode in the cathodic protection circuit (continuous carbon fiber-CFRP composite stress-reinforced mesh) The distance be...

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Abstract

The invention discloses a CFRP-embedded-anode reinforcing-steel-bar-concrete cathode protection method and device. The reinforcing-steel-bar-concrete cathode protection device comprises concrete, plural reinforcing steel bars, a direct-current power source and a CFRP anode; the CFRP anode comprises plural carbon fiber reinforced polymer bars (CFRP), and the CFRP bars and reinforcing steel bars are parallelly embedded into the concrete; the plural CFRP bars are connected with the anode of the direct-current power source in parallel, and the reinforcing steel bars are parallel and connected with the cathode of the direct-current power source. The CFRP-embedded-anode reinforcing-steel-bar-concrete cathode protection method and device are convenient to construct, the bonding strength between an anode material and concrete is high, the resistance between the cathode and the anode is small, and the engineering cost and the cost for protecting a circuit to be normally used are reduced.

Description

[0001] [technical field] [0002] The invention relates to reinforced concrete cathodic protection, in particular to a reinforced concrete cathodic protection method and device in which CFRP is embedded in an anode. [0003] [Background technique] [0004] As a structural material, reinforced concrete is widely used in buildings such as bridges and houses. However, concrete is a porous material. When the structure is in an unfavorable environment such as ocean, saline-alkali land, freeze-thaw cycle, deicing salt, etc., harmful media in the environment will penetrate into the surface of the steel bar through the pores in the concrete and react with it. , causing steel corrosion, resulting in a structure whose service life is much lower than the design life. In order to deal with the corrosion of steel bars, the current and commonly used measures to protect steel bars from corrosion include coating the concrete surface with an anti-seepage layer, using concrete with good compact...

Claims

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Application Information

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IPC IPC(8): C23F13/20C23F13/10
CPCC23F13/10C23F13/20C23F2201/02
Inventor 周英武潘俊隋莉莉邢锋朱继华
Owner SHENZHEN UNIV
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