Electromigration device adopting electroconductive cement based material as anode and method for repairing decaying concrete

A conductive cement and base material technology, which is applied in building insulation materials, building maintenance, building components, etc., can solve the problems of reducing the interface bond force between concrete and steel bars, affecting the bonding performance between steel bars and concrete, etc., to prevent anode Corrosion, reducing the risk of steel bars, and extending the service life

Active Publication Date: 2020-05-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of electrochemical dechlorination, it is inevitable that cations will migrate to the surface of the steel bar, and these ions will combine with hydroxide ions at the interface between the steel bar and the concrete to produce an alkaline gel substance, making the interface loose, thereby making the pore structure These will affect the bonding performance between steel and concrete, and induce the interface bond between concrete and steel to decrease

Method used

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  • Electromigration device adopting electroconductive cement based material as anode and method for repairing decaying concrete
  • Electromigration device adopting electroconductive cement based material as anode and method for repairing decaying concrete
  • Electromigration device adopting electroconductive cement based material as anode and method for repairing decaying concrete

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Embodiment 1

[0029] Embodiment 1 The electromigration device using the conductive cement-based material of the present invention as an anode

[0030] As attached to the manual Figure 1-3 As shown, the electromigration dechlorination device with conductive cement-based material as an anode of the present invention includes a metal mesh 2, a conductive cement-based material installation groove 3 and a functional material area 10, and the conductive cement-based material installation groove 3 is a groove-shaped structure with one side open The metal mesh 2 is built in the bottom of the groove, and the metal mesh 2 is connected with the conductive wire 4 extending to the outside of the bottom of the groove. The inside of the conductive cement-based material installation groove 3 is a functional material area 10, and the side wall of the groove is provided with a hole 1.

[0031] The preparation method of the conductive cement-based material installation groove adopts the following method:

...

Embodiment 2

[0036] Embodiment 2 The method of using the conductive cement-based material of the present invention as an anode electromigration device to repair deteriorated concrete

[0037] like figure 1 As shown, using the above-mentioned electromigration device, through the fixing layer 6, the opening side of the conductive cement-based material installation groove 3 is sealed and fixed on the surface of the deteriorated concrete to be repaired, while ensuring that the side of the groove with the hole 1 faces upward. Then the functional material is placed in the functional material area 10 through the hole 1, and finally the reinforcement in the deteriorated concrete to be repaired is connected to the cathode of the power supply 9, and the conductive wire 4 is connected to the anode of the power supply 9.

[0038] In the above method, the functional material in the tank is used as the electrolyte, and the repair process can be carried out by energizing, and the energizing voltage is pr...

Embodiment 3

[0040] Embodiment 3 Using the conductive cement-based material of the present invention as an anode electromigration device to dechlorinate degraded concrete and repair cracks

[0041] Device and method are as embodiment 1 and 2, and the dosage of carbon fiber is 1% in the described mounting groove, nanometer Al 2 o 3 The dosage is 1.5%, and the added metal mesh 2 is copper mesh. The addition of carbon fiber can ensure the formation of a conductive network in the cement-based material and reduce the resistance; nano-Al 2 o 3The addition of electromigration is conducive to the solidification of chloride ions derived from electromigration and prevents them from further diffusing into the deteriorated concrete; the functional material is selected from the magnesium nitrate solution, and the magnesium ions enter the concrete to form deposition products through chemical reactions, which can prevent cracks on the concrete surface Perform filling repair.

[0042] The magnesium ph...

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Abstract

The invention discloses an electromigration device adopting an electroconductive cement based material as an anode and a method for repairing decaying concrete. The device comprises a metal net, an electroconductive cement based material mounting trough and a function material area. The electroconductive cement based material mounting trough is of a trough-shaped structure with an opening formed in one face, and the metal net is arranged in the trough bottom and is connected with an electric conduction wire extending to the outer portion of the trough bottom. The function material area is arranged in the electroconductive cement based material mounting trough, and a hole is formed in the trough side wall. Compared with the prior art, the electromigration device adopting the electroconductive cement based material as the anode is novel in design and high in practicality; and the defect that the anode in the electromigration device is prone to being rusted and damaged can be overcome well; repeated repairing can be achieved, dismounting is not needed, meanwhile, chloridions guided out by electromigration can be cured, a new technical method can be provided for bidirectional migrationof electromigration dechlorination and electromigration guide-in repair material, and great significance is achieved in repairing decaying concrete and prolonging the service life.

Description

technical field [0001] The invention relates to an electromigration device using a conductive cement-based material as an anode and a method for repairing deteriorated concrete, belonging to the technical field of repairing deteriorated concrete. Background technique [0002] Preventing and inhibiting the corrosion of steel bars in degraded concrete structures is an important link to realize the dynamic extension of service life. There are usually two repair techniques for the deterioration of concrete structures caused by steel corrosion: re-alkalinization and salt drainage. Although this technology has been applied, there are still many uncertainties in the repair effect of deteriorated concrete structures. The problem of degradation appeared again. Moreover, the traditional electrochemical dechlorination technology often uses metal mesh as the anode, and it must be dismantled after dechlorination. The whole system is complicated and cannot meet the requirements of repeat...

Claims

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Application Information

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IPC IPC(8): C23F13/06C23F13/14E04B1/64E04G23/02
CPCC23F13/06C23F13/14E04B1/642E04G23/0218
Inventor 蒋金洋眭世玉吴思燕王凤娟
Owner SOUTHEAST UNIV
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