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Method for detecting corrosion of concrete bar in reinforced concrete

A technology for corrosion of reinforced concrete and steel bars, which is applied in the directions of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc. It can solve the problem that the sampling depth of concrete powder is difficult to accurately determine, the corrosion state of steel bars cannot be accurately judged, and the concrete protective layer is damaged, etc. problem, to achieve the effect of intuitive measurement, simple structure and simple measurement

Inactive Publication Date: 2003-08-27
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This method is actually an indirect test method for judging the corrosion state of steel bars, and its defects are: 1) It is difficult to accurately determine the sampling depth of concrete powder; 2) It has certain damage to the concrete protective layer; 3) For different concrete and surrounding environments (temperature, humidity, pH value, etc.), there are large differences in the critical concentration of chloride ions that cause corrosion of steel bars. The critical concentration of chloride ions varies with specific conditions and is not a constant. The results obtained according to the current method test , and cannot accurately judge the corrosion state of steel bars

Method used

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  • Method for detecting corrosion of concrete bar in reinforced concrete
  • Method for detecting corrosion of concrete bar in reinforced concrete
  • Method for detecting corrosion of concrete bar in reinforced concrete

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Embodiment Construction

[0031] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] The sensor structure that the present invention adopts is as figure 1 , figure 2 shown.

[0033] Select the same steel bar as the used steel bar material of the project, and process it into a steel bar 4 of a certain diameter with a lathe. , 10, 5mm). Simultaneously make a stainless steel rod 5 with the same diameter and the same length as the steel bar 4. An end face welding lead 6 to each steel bar 4 and stainless steel bar 5, and as image 3 As shown, heat-shrinkable tube 11 is put on the end face and side of the wire connection, and sealed with adhesive tape 10 and epoxy resin 12, and then the above steel bar 4 and stainless steel bar 5 are fixed on the base 1 with epoxy resin 12 In the fixed groove 3. Note: The fixed end is the end surface where the wire 6 is welded, and the wire 6 is led out from the ...

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Abstract

The method directly measures the corrosion happened on reinforcing steel bars in real time. The sensor comprises several reinforcing steel bars with non equal lengths, the stainless steel bars having same quantities and lengths as of the reinforcing steel bars, the base seat and the conducting wires. The reinforcing steel bars and the stainless steel bars in stepped appearance are fixed in the fixed slot in the base seat of the sensor side by said. The conducting wires are leaded out and numbered from the threading hole in the middle of the fixed slot. In the time of construction, the said sensors are embedded into concretes. While in the period of the constructions being used, the data from the sensors are collected regularly.

Description

[0001] Field: [0002] The invention relates to a method for detecting steel bar corrosion in reinforced concrete members, which can perform long-term detection of steel bar corrosion in reinforced concrete members in a chlorine-containing environment without damaging the concrete surface, and is applied to the durability of reinforced concrete structures in the field of structural engineering detection and evaluation. technical background: [0003] Corrosion of steel bars in reinforced concrete is one of the main factors affecting the durability of structures. Compared with the corrosion of steel bars caused by carbonation of the concrete cover, the corrosion rate of steel bars caused by chloride ion invasion is faster (about 10 times the corrosion rate of steel bars caused by carbonization), and the loss is greater, which has caused engineering and academia. extensive attention. [0004] At present, the control of the concentration of chloride ions in concrete mixture or a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N27/26
Inventor 宋晓冰刘西拉
Owner SHANGHAI JIAO TONG UNIV
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