Long term monitoring sensor for steel bar corrosion in steel concrete member

A reinforced concrete and monitoring sensor technology, which is applied in weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc., can solve the problem that the area of ​​cathode and anode does not conform to the actual situation, increase the permeability of concrete at the test site, and make it difficult to insert and locate the steel mesh and other problems, to achieve the effect of convenient on-site positioning, intuitive measurement and simple measurement

Inactive Publication Date: 2007-04-11
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Since general corrosion has the characteristics of a large cathode and a small anode, the same cathode and anode area does not conform to the actual situation
[0009] 3. After the steel bar in the sensor is corroded, since the corrosion product occupies a larger volume than the corroded steel, the expansion effect will damage the concrete protective layer, increase the permeability of the concrete at the test site, and have a greater impact on th

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  • Long term monitoring sensor for steel bar corrosion in steel concrete member
  • Long term monitoring sensor for steel bar corrosion in steel concrete member
  • Long term monitoring sensor for steel bar corrosion in steel concrete member

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Embodiment Construction

[0043] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] The structure of the sensor used in the present invention is shown in Figure 1 and Figure 2, including a stepped base 6, an electrode rod inserted in the fixed groove of the stepped base 6, and a cable interface connected to the wire 10 drawn from the electrode rod 12.

[0045] The electrode rod is composed of a steel bar 4 as an anode and a stainless steel tube 5 as a cathode. Choose the steel bar identical with the used steel bar material of engineering, process the steel bar 4 of certain diameter with lathe as anode, the length of steel bar 4 is determined by the protective layer thickness of structural steel bar (as the protective layer thickness of 30mm, then the length of steel bar It is 30-5+10=35mm). Simultaneously make a stainless steel tube 5 with the same length as the steel bar 4 as the cathode, and the inner dia...

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Abstract

The long term monitoring sensor for corrosion of steel bar in steel concrete member consists of electrode rods in the same length, pedestal, wires and sacrificed anode. The electrode rods are fixed in the sensor pedestal in stepped form, and the wires are connected through leaf springs to the anode and cathode of the electrode rods. During construction, the monitoring sensor is embedded into the concrete for subsequent regular data acquisition. In the case of finding out corroded steel bar in some electrode rod, the steel bar is protected via the cathode protector. The present invention can perform non-destroying detection of the steel bars in different depth and determine the frontal surface distance of the invading corrosive medium.

Description

technical field [0001] The invention relates to a sensor for long-term monitoring of steel bar corrosion in reinforced concrete components, which can perform long-term detection of steel bar corrosion in reinforced concrete components 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. Background technique [0002] 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. [0003] At present, the control of the concentration of chloride ions in ...

Claims

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Application Information

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IPC IPC(8): G01N17/02G01N27/26
Inventor 宋晓冰刘西拉
Owner SHANGHAI JIAO TONG UNIV
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