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

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

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

CN100454000CInactive Publication Date: 2009-01-21SHANGHAI JIAOTONG UNIV

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

[0044] The sensor structure that the present invention adopts is as figure 1 , figure 2 As shown, it includes a stepped base 6 , an electrode rod inserted into the fixing groove of the stepped base 6 , and a cable interface 12 connected with a wire 10 drawn out from the electrode rod.

[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 th...

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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 ...

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Application Information

Patent Timeline

21 Jan 2009

Publication

CN100454000C

IPC: G01N17/02; G01N27/26

Inventors: 宋晓冰; 刘西拉