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A Repairing Method for Reinforced Concrete of Damaged Bridge Pier

A technology of reinforced concrete and bridge piers, which is applied in the field of bridges, can solve the problems of repair materials spalling and repair failure, and achieve the effects of reducing cracks and cracks, prolonging service life and delaying the electrochemical reaction process

Active Publication Date: 2021-10-29
江西赣粤高速公路工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the repair of the bridge, the repair material is often peeled off due to freeze-thaw damage, making the repair invalid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for repairing reinforced concrete of damaged bridge piers,

[0031] First, clean the surface of the damaged bridge pier until there is no debris or water on the surface.

[0032] Coat the exposed steel bar surface with a steel bar rust inhibitor, the steel bar rust inhibitor is composed of: sodium tetraborate 12g / L, sodium silicate 9g / L, tetradecyl dimethyl benzyl ammonium chloride 5g / L, tetrahydrofuran 4g / L, chromium nitrate 3g / L, threonine 1g / L, and the balance is water, bake the coated rust-proof layer, the baking temperature is controlled at 60-70°C, and the baking time is 10 minutes.

[0033] Then the interface binder is sprayed to damage the concrete surface, and it is sprayed evenly and left to stand for 5 minutes.

[0034] The antifreeze repair material is used to repair and fill the bridge pier defect, and after filling and repairing, it is naturally cured for 12 hours.

[0035] The preparation method of the antifreeze repair material includes the fo...

Embodiment 2

[0039] A method for repairing reinforced concrete of damaged bridge piers,

[0040] First, clean the surface of the damaged bridge pier until there is no debris or water on the surface.

[0041] Coat the exposed steel bar surface with steel bar rust inhibitor, the steel bar rust inhibitor is composed of: sodium tetraborate 11g / L, sodium silicate 8g / L, tetradecyl dimethyl benzyl ammonium chloride 3g / L, tetrahydrofuran 3g / L, chromium nitrate 3g / L, threonine 2g / L, and the balance is water. Baking the coated rust-proof layer, the baking temperature is controlled at 60-70°C, and the baking time is 12 minutes.

[0042]Then the interface binder is sprayed to damage the concrete surface, and it is sprayed evenly and left to stand for 6 minutes.

[0043] The anti-freeze repair material is used to repair and fill the bridge pier defect, and after filling and repairing, it is naturally cured for 16 hours.

[0044] The preparation method of the antifreeze repair material includes the fo...

Embodiment 3

[0048] A method for repairing reinforced concrete of damaged bridge piers,

[0049] First, clean the surface of the damaged bridge pier until there is no debris or water on the surface.

[0050] Coat the exposed steel bar surface with steel bar rust inhibitor, the steel bar rust inhibitor is composed of: sodium tetraborate 10g / L, sodium silicate 10g / L, tetradecyl dimethyl benzyl ammonium chloride 5g / L, tetrahydrofuran 3g / L, chromium nitrate 3g / L, threonine 3g / L, and the balance is water. Baking the coated antirust layer, the baking temperature is controlled at 60-70°C, and the baking time is 15 minutes.

[0051] Then the interface binder is sprayed to damage the concrete surface, and it is sprayed evenly and left to stand for 7 minutes.

[0052] The antifreeze repair material is used to repair and fill the bridge pier defect, and after filling and repairing, it is naturally cured for 18 hours.

[0053] The preparation method of the antifreeze repair material includes the fol...

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PUM

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Abstract

A method for repairing reinforced concrete of damaged bridge piers. First, the surface of the damaged bridge pier is cleaned until the surface is free of debris and water, and the surface of the exposed steel bars is coated with a steel bar rust inhibitor. The steel bar rust inhibitor is composed of sodium tetraborate 10‑12g / L, sodium silicate 8‑10g / L, tetradecyl dimethyl benzyl ammonium chloride 3‑6g / L, tetrahydrofuran 3‑6g / L, chromium nitrate 3‑4g / L, threonine Acid 1-4g / L, the balance is water, bake the rust-proof layer after coating, the baking temperature is controlled at 60-70°C, and the baking time is 10-15 minutes, the steel bar rust inhibitor of the present invention makes the whole The steel bar is wrapped by a layer of passivation film, dense and stable, which can prevent the penetration of chloride ions, reduce the free speed of iron ions, effectively inhibit, prevent and delay the electrochemical reaction process of steel bar corrosion, thereby prolonging the life of reinforced concrete structures service life.

Description

technical field [0001] The invention relates to a method for repairing reinforced concrete of a damaged bridge pier, which belongs to the technical field of bridges. Background technique [0002] Surface spalling is the main form of damage to repair materials subjected to freeze-thaw cycles. After the repair of the bridge, the repair material often peels off due to freeze-thaw damage, making the repair invalid. Improving the anti-freeze performance of repair materials is an urgent problem to be solved in the existing technology. Traditional repair construction cannot improve the anti-freeze performance of repaired bridges, and cannot solve the problem of spalling of the anti-freeze surface of repair materials. Contents of the invention [0003] In order to solve the problems in the prior art, the present invention provides a method for repairing reinforced concrete of damaged bridge piers. [0004] A method for repairing reinforced concrete of damaged bridge piers, [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/72C04B111/20
CPCC04B28/04C04B2111/20C04B2111/723C04B2201/50C04B24/302C04B14/303C04B18/023C04B24/18C04B14/4656C04B18/12C04B2103/601C04B2103/302
Inventor 吴建明孙皓颜灵胜张滨
Owner 江西赣粤高速公路工程有限责任公司
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