Method and device for repairing concrete crack by pulse electrodeposition
A technology of pulse electrodeposition and concrete, which is applied in water conservancy projects, sea area projects, building components, etc., to achieve good results, simple repair device structure, and improved pore structure
Inactive Publication Date: 2011-01-12
HOHAI UNIV
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Problems solved by technology
So far, there have been no reports at home and abroad that use pulse power to repair concrete cracks and improve the repair effect.
Method used
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Effect test
Embodiment 1
[0024] Using ZnSO 4 It is an electrodeposition solution with a concentration of 0.15mol / L, a pulse on / off time of 0.6ms / 0.8ms, and a current density of 0.5A / m on the concrete surface 2 , The electrode distance is 40mm. The electrodeposition solution was replaced every 7 days, and the test piece was taken out on the 21st day, and the crack healing rate reached 100%.
Embodiment 2
[0026] Using MgSO 4 It is an electrodeposition solution, the concentration is 0.1mol / L, the pulse on / off time is 0.8ms / 0.8ms, and the current density on the concrete surface is 0.5A / m 2 , The electrode distance is 40mm. The electrodeposition solution was replaced every 7 days, and the test piece was taken out on the 21st day, and the crack healing rate reached 96%.
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Abstract
The invention discloses a method for repairing a concrete crack by means of pulse electrodeposition, wherein a reinforcing steel bar in concrete is taken as a cathode and a titanium screen is taken as an anode, and the reinforcing steel bar and the titanium screen are arranged near the concrete; a 0.05-0.50 mol per liter zinc saline solution or magnesium saline solution is taken as an electrodeposition solution, and the concrete is immersed into the electrodeposition solution; a pulse power source is adopted, and the on / off time of pulse is between 0.6 and 1 ms; the current density exerted onthe surface of the concrete is between 0.25 and 3 amperes per square meter; and the concrete provided with the crack is repaired by means of electrodeposition. The invention also discloses an applicable device for the method for repairing the concrete crack by means of pulse electrodeposition. The method for repairing the concrete crack by means of pulse electrodeposition and the repairing devicethereof have the advantages of simple structure, convenient operation, low cost, good effect and so on, and are suitable for concrete structures in a water environment and concrete structures which are difficult to be repaired by the prior repairing technology or have high repairing cost.
Description
technical field [0001] The invention belongs to the technical field of civil engineering materials, and in particular relates to a method and a device for repairing concrete cracks by pulse electrodeposition. Background technique [0002] Concrete is the most widely used engineering material in modern architecture, water conservancy, ports and bridges, and plays roles and functions that other materials cannot replace. The disadvantage of concrete materials is that they are brittle and easy to corrode. During their service, they will be affected by external environment and internal factors, resulting in cracks, local damage and corrosion. Over time, these diseases will become more and more serious, resulting in constant performance of concrete materials. The light ones will affect the normal use of the structure or shorten the service life of the structure, and the severe ones will cause catastrophic accidents, which will bring huge losses to the national economy and people's...
Claims
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IPC IPC(8): E04B1/68E02B3/16
Inventor 蒋林华储洪强蒋俣于丽波徐金霞
Owner HOHAI UNIV
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