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Composite type sacrificial anode for repairing reinforced concrete structures

A reinforced concrete and sacrificial anode technology, applied in the field of corrosion and protection, can solve the problems of not developing sacrificial anode materials, effectively determining the protection area and construction area of ​​the reinforced concrete tidal range area and splash area, and achieving simple installation, Inexpensive and wide-ranging effects

Active Publication Date: 2013-07-24
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
Comparison scheme
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 a heating furnace, add Al, Mg, Si, Sn to the molten zinc solution according to the ratio, stir it with a graphite rod, remove the slag, take it out of the furnace and cast it into the spiral of the pre-placed iron core 6 shape mold. The formula of high conductivity 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-shaped sacrificial anode 2 into the rectangular filling body mold, according to the above formula, put the filling material (high conductivity cement colloid 1) into...

Embodiment 2

[0043] The composite sacrificial anode of the present invention is used for the repair of reinforced concrete in the tidal range area 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. Melt the zinc ingot in a heating furnace with a graphite crucible, add Al, Mg, Si, and Sn to the molten zinc solution according to the ratio, stir it 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 high 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-shaped sacrificial anode 2 into the rectangular filling body mold, according to the above formula, put the high-conductivity cement colloid 1 into the mold, and after curing, you can get ...

Embodiment 3

[0047] The composite sacrificial anode of the present invention is used for the repair of reinforced concrete in the atmosphere area 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%, impurity Content: Fe≤0.005%, Cu≤0.005%, Pb≤0.01%, Cd≤0.003%, and the balance is Zn. Melt the zinc ingot in a heating furnace with a graphite crucible, add Al, Mg, Si, and Sn to the molten zinc solution according to the ratio, stir it 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 high conductivity cement colloid 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 spiral-shaped sacrificial anode into the cylindrical filler mold, according to the above formula, put the filler into the mold, and after curing, you can get figure 1 The composite sacrificial an...

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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 Patents(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