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Solution for electrochemically repairing concrete cracks and preparation method thereof

A concrete and electrochemical technology, which is applied in the field of electrochemical repair of concrete cracks and its preparation, can solve the problems of poor repair effect and large difference in component performance, and achieve the effect of reducing erosion and good interface compatibility

Pending Publication Date: 2022-04-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a solution for electrochemically repairing concrete cracks and its preparation method to overcome the problem that the electrolyte solution is not consumed in the prior art Strong acid ions are corrosive, the composition and properties of the deposited product are greatly different from those of cement hydration products, or the repair effect is poor.

Method used

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  • Solution for electrochemically repairing concrete cracks and preparation method thereof
  • Solution for electrochemically repairing concrete cracks and preparation method thereof
  • Solution for electrochemically repairing concrete cracks and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A solution for electrochemically repairing cracks in concrete. The solution is a composite electrolyte solution, which is prepared by mixing two solutions A and B in a certain proportion, wherein A solution is 0.1mol / l Ca(CH 3 COO) 2 ·H 2 O aqueous solution, B solution is 0.05mol / l Al 2 (SO 4 ) 3 18H 2 O aqueous solution, the preparation method for the solution of the electrochemical repair concrete crack comprises the following steps:

[0037] (1) A solution (Ca(CH 3 COO) 2 ·H 2 O aqueous solution) and B solution (Al 2 (SO 4 ) 3 18H 2 O aqueous solution);

[0038] (2) Mix A and B solutions at a volume ratio of 3:1, and stir evenly to obtain the product.

Embodiment 2

[0040] A solution for electrochemically repairing cracks in concrete. The solution is a composite electrolyte solution, which is prepared by mixing two solutions A and B in a certain proportion, wherein A solution is 0.1mol / l Ca(CH 3 COO) 2 ·H 2 O aqueous solution, B solution is 0.05mol / l Al 2 (SO 4 ) 3 18H 2 O aqueous solution, the preparation method for the solution of the electrochemical repair concrete crack comprises the following steps:

[0041] (1) A solution (Ca(CH 3 COO) 2 ·H 2 O aqueous solution) and B solution (Al 2 (SO 4 ) 3 18H 2 O aqueous solution);

[0042] (2) Mix A and B solutions at a volume ratio of 4:1, and stir evenly to obtain the product.

Embodiment 3

[0044] A solution for electrochemically repairing cracks in concrete. The solution is a composite electrolyte solution, which is prepared by mixing two solutions A and B in a certain proportion, wherein A solution is 0.1mol / l Ca(CH 3 COO) 2 ·H 2 O aqueous solution, B solution is 0.05mol / l Al 2 (SO 4 ) 3 18H 2 O aqueous solution, the preparation method for the solution of the electrochemical repair concrete crack comprises the following steps:

[0045] (1) A solution (Ca(CH 3 COO) 2 ·H 2 O aqueous solution) and B solution (Al 2 (SO 4 ) 3 18H 2 O aqueous solution);

[0046] (2) Mix A and B solutions at a volume ratio of 5:1, and stir evenly to obtain the product.

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Abstract

The invention relates to a solution for electrochemically repairing concrete cracks and a preparation method thereof, and the solution is prepared by the following preparation method: mixing a Ca (CH3COO) 2. H2O aqueous solution and an Al2 (SO4) 3. 18H2O aqueous solution to obtain a target product. Compared with the prior art, when the solution is used for electrochemical repair, positive ions (Al < 3 + > and Ca < 2 + >) and strong acid radical ions (SO4 < 2->) in the solution can be used for deposition reaction at the same time, 'harmful 'is changed into'beneficial', weak acid radical ions (CH3COO <->) have no corrosivity to concrete, and corrosion of an electrolyte solution to a concrete matrix is greatly reduced. Meanwhile, a deposition product obtained by the electrolyte solution is one of main hydration products of cement, ettringite and a concrete matrix have better interfacial compatibility, and the electrodeposition repairing effect can be further improved.

Description

technical field [0001] The invention belongs to the technical field of concrete crack repair, and relates to a solution for electrochemically repairing concrete cracks and a preparation method thereof. Background technique [0002] Electrochemical repair method is a new method of repairing concrete cracks. It mainly uses the characteristics of reinforced concrete itself and the water environment conditions to effectively realize the self-healing of concrete cracks. It is especially suitable for steel bars in water environments where traditional repair methods are difficult to work. Repair of micro-cracks in concrete. [0003] This technology was first applied to the repair of marine concrete structures. Seawater is used as the electrolyte solution, steel bars are used as the cathode, and an auxiliary anode is added, and a weak current is applied between the cathode and the anode. Under the action of an electric field, the cations (Mg 2+ , Ca 2+ etc.) to the cathode, and a...

Claims

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Application Information

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IPC IPC(8): C04B41/85
Inventor 陈庆朱合华谢林君
Owner TONGJI UNIV
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