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Composite type sacrificial anode for repairing reinforced concrete structures

A technology of reinforced concrete and sacrificial anode, which is applied in the field of corrosion and protection, can solve the problems of inability to effectively determine the protection area and construction area of ​​reinforced concrete tidal zone and splash zone, and lack of research and development of sacrificial anode materials. Simple installation, wide application effect

Active Publication Date: 2012-04-18
SUNRUI MARINE ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the protection area and construction area of ​​the reinforced concrete tidal range area and splash area cannot be effectively determined
Most of the sacrificial anodes used in the above patents are pure zinc or national standard zinc alloy sacrificial anodes, and no new type of sacrificial anode material has been developed.

Method used

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  • Composite type sacrificial anode for repairing reinforced concrete structures
  • Composite type sacrificial anode for repairing reinforced concrete structures
  • Composite type sacrificial anode for repairing reinforced concrete structures

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The composite sacrificial anode of the present invention is used for the repair of reinforced concrete in the full immersion area of ​​the marine environment. The formula of the zinc alloy sacrificial anode 2 is Al: 0.35%, Mg: 0.3%, Si: 0.85%, Sn: 0.28%, and the impurity content: Fe≤0.005%, Cu≤0.005%, Pb≤0.01%, Cd≤0.003%, and the balance is Zn. Use a graphite crucible to melt the zinc ingot in the heating furnace, add Al, Mg, Si, and Sn to the molten zinc solution according to the proportion, stir with a graphite rod, remove the slag, and cast it into the spiral of the iron core 6 placed in advance. in the mold. The formula of the highly conductive cement colloid 1 is, Portland cement: sand: graphite: bentonite: lithium nitrate: polypropylene fiber: water = 1:0.95:0.1:0.15:0.06:0.006:0.5. Put the spiral sacrificial anode 2 into a rectangular filler mold, and according to the above formula, put the filler (high conductive cement colloid 1) into the mold, and after curin...

Embodiment 2

[0043] The composite sacrificial anode of the present invention is used for the repair of reinforced concrete in the tidal zone of the marine environment. The formula of the zinc alloy sacrificial anode 2 is Al: 0.65%, Mg: 0.48%, Si: 0.55%, Sn: 0.33%, and the impurity content: Fe≤0.005%, Cu≤0.005%, Pb≤0.01%, Cd≤0.003%, and the balance is Zn. Use a graphite crucible to melt the zinc ingot in a heating furnace, add Al, Mg, Si, and Sn to the molten zinc solution according to the ratio, stir with a graphite rod, remove the slag, and cast it into the spiral shape of the pre-placed iron core. in the mold. The formula of highly conductive cement colloid 1 is Portland cement: sand: coke: bentonite: lithium nitrate: polypropylene fiber: water = 1:0.85:0.15:0.18:0.10:0.005:0.85. Put the spiral sacrificial anode 2 into the rectangular filler mold, according to the above formula, put the highly conductive cement colloid 1 into the mold, and after curing, it is obtained. figure 2 The co...

Embodiment 3

[0047] The composite sacrificial anode of the present invention is used for the repair of reinforced concrete in atmospheric areas containing chlorine. The formula of the high-performance zinc alloy sacrificial anode is Al: 0.82%, Mg: 0.4%, Si: 0.5%, Sn: 0.6%, impurities Content: Fe≤0.005%, Cu≤0.005%, Pb≤0.01%, Cd≤0.003%, the balance is Zn. Use a graphite crucible to melt the zinc ingot in a heating furnace, add Al, Mg, Si, and Sn to the molten zinc solution according to the ratio, stir with a graphite rod, remove the slag, and cast it into the spiral shape of the pre-placed iron core. in the mold. The highly conductive cement colloid formula is Portland cement: sand: graphite: bentonite: lithium nitrate: polypropylene fiber: water = 1:0.65:0.14:0.2:0.010:0.008:0.65. Put the helical sacrificial anode into the filling body mold of the cylinder, according to the above formula, put the filling material into the mold, and after curing, you can get figure 1 The finished composite...

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Abstract

The invention relates to a composite type sacrificial anode for repairing reinforced concrete structures. The composite type sacrificial anode comprises a zinc alloy sacrificial anode, a high-conducting cement colloid and connection devices, wherein the zinc alloy sacrificial anode is wrapped by a cylinder or a cuboid high-conducting cement colloid, and the connection devices are led out of the high-conducting cement colloid from one end or two ends of the sacrificial anode. In a formula, the zinc alloy sacrificial anode comprises the following components in percentage by weight: 0.3 to 1.2 percent of Al, 0.1 to 0.5 percent of Mg, 0.5 to 0.9 percent of Si, 0.15 to 0.65 percent of Sn and the balance of Zn; and the high-conducting cement colloid comprises silicate cement, a fine aggregate, coke breeze, graphite, lithium nitrate, bentonite and polypropylene fibers. The sacrificial anode is easy to install and construct, low in cost and long in service life, and is suitable for repairing the reinforced concrete structures in total immersion zones, tidal range zones, splash zones and atmospheric zones in marine environments and at bridges, wharfs, tunnels, underground parking garages and the like in other chlorine environments.

Description

technical field [0001] The invention relates to a composite sacrificial anode used for repairing reinforced concrete structures, which belongs to the field of corrosion and protection. Background technique [0002] So far, foreign countries have implemented cathodic protection for reinforced concrete structures for more than 30 years. Great progress has been made in all aspects. In recent years, a lot of research work has been done on the application of cathodic protection in prestressed reinforced concrete structures, and the effect of cathodic protection on extending and maintaining the durability of new reinforced concrete structures, and relevant standards and specifications have been formulated. The effective implementation of cathodic protection for concrete provides a technical basis. [0003] The cathodic protection technology of reinforced concrete is divided into two technologies, namely impressed current cathodic protection technology and sacrificial anode prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/16
Inventor 王海涛刘雪雷郝少丽刘光洲王洪仁
Owner SUNRUI MARINE ENVIRONMENT ENG
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