CN206945599U - Built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring - Google Patents

Built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring Download PDF

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Publication number
CN206945599U
CN206945599U CN201720339105.9U CN201720339105U CN206945599U CN 206945599 U CN206945599 U CN 206945599U CN 201720339105 U CN201720339105 U CN 201720339105U CN 206945599 U CN206945599 U CN 206945599U
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China
Prior art keywords
reference electrode
seal
sleeve pipe
built
reinforced concrete
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CN201720339105.9U
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Inventor
汤雁冰
蒋志勇
刘志红
乔岩欣
郭平义
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Institute Of Marine Equipment Jiangsu University Of Science And Technology
Jiangsu University of Science and Technology
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Jiangsu University of Science and Technology
Marine Equipment and Technology Institute Jiangsu University of Science and Technology
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Abstract

The utility model discloses a kind of steel reinforced concrete erosion monitoring built-in type reference electrode, including copper cable, sleeve pipe, gel electrolyte, electrode body, micropore ceramics block, afterwards protective case, activation seal, water-swellable layer and rear activation seal dissolving mortar;Outside by the medium transmission end in existing reference electrode sets activated later seal, the medium separated early stage between internal electrolyte and concrete transmits, water-swellable layer is filled between reference electrode medium transmission end micropore ceramics and rear activation seal, the space after seal dissolving is activated after filling up, ensures the good transmission of medium.The utility model significantly improves the service life of reference electrode using the method for activated later, realizes the life cycle management monitoring of corrosion conditions of reinforcement.

Description

Built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring
Technical field
It the utility model is related to a kind of reference electrode, and in particular to built-in type reference is used in a kind of steel reinforced concrete erosion monitoring Electrode, belong to reinforced concrete structures corrosion and protection technology field.
Background technology
Chlorion intrusion causes the corrosion of reinforcing bar to be the main reason that concrete structure durability declines, and serious threat is mixed The service safety of Xtah Crude Clay structure, therefore, prison detection in real time is carried out to the steel bar corrosion state in concrete structure.Understand reinforcing bar Rusting rate and corrosion degree we are evaluated with the service safety of concrete structure and remaining life there is important meaning Justice.Chlorion intrusion causes the corrosion of reinforcing bar to be mainly electrochemical corrosion, and reference electrode is to realize that reinforcing bar electrochemical corrosion is real-time Supervise the core component of detecting system.
However, because concrete structure has long service life, this requires pre- be embedded in concrete to be used to monitor steel The reference electrode of muscle etch state has long service life, and used by electro-chemical test reference electrode inside electrolyte Liquid electrolyte typically is used, liquid electrolyte has good mobility and ion transport, causes electrolyte loss serious, Cause the service life of reference electrode not grow, be typically only several years, it is difficult to meet the service life requirement of monitoring corrosion of steel.For The service life of reference electrode is improved, conventional way is to substitute liquid electrolyte, effectively drop using solid electrolyte at present The loss speed of low electrolyte, improve the service life of reference electrode.For the inside solid electrolyte of reference electrode, Qian Renyi Substantial amounts of research is done.Tettamanti prepares long service life reference electrode by the use of cement-based material as solid electrolyte; Mueller prepares solid electrolyte with bentonite and water imbibition compound;Ou Jinping etc. is by KCl, Al2O3Mix and extrude with PEFT Solid electrolyte is made, then they prepare solid electrolyte using montmorillonite again;Mroz et al. uses agar and macromolecule Polymer prepares solid gel electrolyte;Rehm prepares solid electrolyte using epoxy resin;High national wealth etc. uses carboxymethyl Hydroxyethyl cellulose prepares solid-state gelled electrolyte.Although the reference electrode significantly improved using solid electrolyte uses the longevity Life, but its life-span still less than 20 years, can not still meet corrosion conditions of reinforcement life cycle management monitoring, reference electrode use the longevity Life turns into the key technology bottleneck for restricting monitoring corrosion of steel.
The content of the invention
The purpose of this utility model is to be difficult to meet the corrosion conditions of reinforcement life-cycle for existing reference electrode service life The state of the art of cycle monitoring, seal is activated after being set outside the medium transmission end of existing reference electrode, it is close in rear activation Water-swellable layer is set between sealing and medium transmission micropore ceramics, the use of reference electrode is improved using the method for activated later In the life-span, realize the life cycle management monitoring of corrosion conditions of reinforcement.
To reach above-mentioned purpose, the technical solution adopted in the utility model is:
Built-in type reference electrode, including copper cable 1, sleeve pipe 3, electrode body 5 are used in a kind of steel reinforced concrete erosion monitoring;Institute The lower end pipe overcoat for stating sleeve pipe 3 is connected to protective case 10, and upper pipes have been embedded in sealing shroud 2, in described sleeve pipe 3 from bottom to top successively Seal dissolving mortar 11 is activated after being provided with, it is rear to activate seal 9, water-swellable layer 8 and micropore ceramics block 6, wherein after described Seal 7 is respectively equipped with side face between activation seal 9, the micropore ceramics block 6 and the inwall of described sleeve pipe 3;The electrode Body 5 and the coaxial line of described sleeve pipe 3, one end isolation are interspersed in sealing shroud 2 located at the top of micropore ceramics block 6, the other end In, gel electrolyte 4 is filled with around it;One end of the copper cable 1 is stretched out outside described sleeve pipe 3, and the other end is interspersed in described It is connected in sealing shroud 2 with electrode body 5.
Further, the electrode body 5 is Ag/AgCl electrodes, Mn/MnO2Electrode or Cu saturations CuSO4Electrode.
Further, the material of the rear activation seal 9 is high purity zinc or its composition is:0.2%≤aluminium≤0.8%, 0.05%≤cadmium≤0.12%, iron≤0.005%, copper≤0.005%, lead≤0.006%, silicon≤0.125%, surplus are zinc Kirsite.
Further, the water-swellable layer 8 is bentonite gel layer, and the thickness of water-swellable layer 8 activates sealing after being 2-5 times of the thickness of part 9, bentonite accounts for the 15%~30% of water quality.
Further, described sleeve pipe 3 and the material of protective case 10 are polytetrafluoroethylene (PTFE).
Further, the gel electrolyte 4 is methyl cellulose gel electrolyte.
Further, the micropore ceramics block 6 is thickness 10mm, aperture 0.2um, the diatomite micropore pottery of the porosity 80% Porcelain.
Further, the sealing shroud 2 and seal 7 are epoxy resin.
Further, the thickness of described rear activation seal dissolving mortar 11 is 2~3cm, is cement-based mortar, by water Mud, water, sand, carbon fiber, bentonite and lithium nitrate mix, wherein, the mass ratio of water and cement is 0.5~0.6:1, cement Mass ratio with sand is 0.4~0.6:1, bentonitic volume is the 15%~30% of cement quality, and carbon fiber content is cement The 0.5%~1% of quality, the volume of lithium nitrate for activation seal after per cubic centimeter dissolve mortar (11) 0.05~ 0.50g, the cement are portland cement.
To reach above-mentioned purpose, another technical scheme that the utility model uses is:
A kind of steel reinforced concrete erosion monitoring manufacture method of built-in type reference electrode, includes the preparation of electrode body; The preparation of gel electrolyte;The preparation of seal dissolving mortar is activated afterwards;The preparation of water swelling gel rubber material and reference electrode Preparation;Comprise the concrete steps that, first by the lower end of the rear activation seal dissolving sprue bushing 3 of mortar 11;Then sealing is activated by after It is interior and coaxial with sleeve 3 and be in close contact with rear activation seal dissolving mortar 11 that part 9 is put into sleeve pipe 3, it is rear activate seal 9 with Sealing fixation is carried out using epoxy resin between sleeve pipe 3;After seal dissolving mortar solidification is activated after, then by water swelling Water-swellable layer 8 is formed in gel rubber material sprue bushing 3;Micropore ceramics block 6 is put into sleeve pipe 3 and kept same with sleeve 3 again Axle and it is in close contact with water-swellable layer 8, sealing fixation is carried out using epoxy resin between micropore ceramics block 6 and sleeve pipe 3;Again will Gel electrolyte 4 fills the upper cavity of micropore ceramics block 6 in sleeve pipe 3;After the cooling gelling of gelled electrolyte 4, it will be welded with Center line insertion of the electrode body 5 of copper cable 1 along sleeve pipe 3, then the upper pipes of sleeve pipe 3 are sealed with sealing shroud 2, finally Protective case 10 is socketed in outside the lower end pipe of sleeve pipe 3, steel reinforced concrete erosion monitoring is made and uses built-in type reference electrode.
The utility model activates seal after being set outside the medium transmission end of conventional reference electrode, separates reference electrode Medium transmission between internal electrolyte and concrete, with continuous corrosion dissolution of the rear activation seal in concrete, ginseng Than realizing that medium transmits between the inside electrolyte and concrete of electrode, reference electrode is activated and starts to monitor the corrosion shape of reinforcing bar State.Water uptake expansion material is filled between reference electrode electrode dielectric transmission end micropore ceramics and rear activation seal, ensures medium Good transmission.
The activationary time of the utility model reference electrode can be calculated as the following formula:T=(d × ρ)/R, t is activationary time, D activates seal thickness after being, ρ activates seal density after being, R activates the year corrosion rate of seal unit area after being.
The utility model compared with prior art, possessed advantage and beneficial effect:
The service life of large ferroconcrete structure thing be generally 50 years even it is longer.Because of the protective effect of concrete, Reinforcing bar is typically just corroded after using several years even decades.And current monitoring corrosion of steel reference electrode makes It is no more than 20 years with longest-lived, in other words, when later stage reinforcing bar may need to monitor corrosion conditions of reinforcement, reference is electric Fail pole, it is impossible to monitor the etch state of reinforcing bar.The utility model corrodes relative to existing concrete structure reinforcing bars supervises Survey reference electrode, activates sealing system after setting outside the medium transmission end of reference electrode, including rear activation seal, after Activate seal dissolving packed layer and water-swellable layer.Early stage, the rear sealing system that activates can separate dispatch from foreign news agency in reference electrode early stage The circulation of matter, later stage are solved, the rear seal that activates gradually is dissolved, and the inside and outside electrolyte of reference electrode is gone into circulation, and reference electrode is opened Beginning work, the etch state of reinforcing bar is monitored in real time, assess the durability of reinforced concrete structure, ensure the safety of concrete structure It is on active service.
Brief description of the drawings
Fig. 1 is the basic structure schematic diagram of the utility model reference electrode;
Fig. 2 is that the electrode potential of the utility model reference electrode changes over time curve map.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is described in further detail.It should be appreciated that specific embodiment described herein is used only for solving The utility model is released, is not used to limit the utility model.
Embodiment of the present utility model is for activation seal after adding and the reference electrode after water uptake expansion material Embodiment, it is one embodiment that the utility model reference electrode is formed using Ag/AgCl electrodes as electrode body, But the reference electrode that existing Ag/AgCl reference electrodes and the utility model utilize Ag/AgCl electrodes to be formed need to be distinguished.As above institute State, not separately as embodiment, the preparation of gel electrolyte is also in this way, it is only this reality for the preparation of Ag/AgCl electrode bodies With one of step of new embodiment.
As shown in figure 1, be a kind of steel reinforced concrete erosion monitoring built-in type reference electrode of the present utility model, including copper Cable 1, sleeve pipe 3, electrode body 5;The lower end pipe overcoat of described sleeve pipe 3 is connected to protective case 10, and sealing shroud 2 is provided with upper pipes, Seal dissolving filling mortar 11, rear activation seal 9, water swelling are activated after being sequentially provided with from bottom to top in described sleeve pipe 3 Material 8 and micropore ceramics block 6, wherein the week after described between activation seal 9, the micropore ceramics block 6 and the inwall of described sleeve pipe 3 Seal 7 is respectively equipped with face;The electrode body 5 and the coaxial line of described sleeve pipe 3, one end isolation are located at the micropore ceramics block 6 tops, the other end is interspersed in sealing shroud 2, is filled with gel electrolyte 4 around it;Described in one end of the copper cable 1 is stretched out Sleeve pipe 3, the other end is interspersed in the sealing shroud 2 to be connected with electrode body 5.
The external diameter of described sleeve pipe 3 is Φ 25mm, and internal diameter is Φ 20mm, a length of 100mm.
The electrode body 5 is Ag/AgCl electrodes;Seal 9 is activated after described to activate seal after kirsite;It is described Water uptake expansion material 8 is sodium base bentonite.
Described sleeve pipe 3 and the material of protective case 10 are polytetrafluoroethylene (PTFE);The gel electrolyte 4 coagulates for methylcellulose Glue electrolyte.
The micropore ceramics block 6 is thickness 10mm, aperture 0.2um, the diatomite micropore ceramics of the porosity 80%;It is described close Big envelope 2 and seal 7 are epoxy resin.
A kind of manufacture method of steel reinforced concrete erosion monitoring built-in type reference electrode of the utility model embodiment, including Following steps:
(1) preparation of Ag/AgCl electrodes
With epoxy resin pair after size is welded for 3 × 80mm of Φ bar-shaped pure Ag (99.99%) with the copper wire of copper cable Weld is sealed, to prevent the generation of galvanic corrosion.Ag rods are put into acetone soln and removed after 600# sand paper uniform grindings The greasy dirt on surface is removed, 1min in 5% salpeter solution is put into after being cleaned with water and is put into remove the oxide on surface, then by silver-colored rod Cleaned in alcohol with ultrasonic wave.Silver-colored rod after cleaning is put into electrolytic cell, silver-colored rod is as anode, MMO titanium-baseds mixing gold Belong to oxide as negative electrode, with 1mA/cm2Current density 0.1mol/L the anodized 1 hour obtained Ag/ of HCl solution AgCl electrodes, the electrode prepared is put into stand-by in 0.1mol/L KCl solution.
(2) preparation of gel electrolyte
It is as follows as electrolyte, its preparation method using 0.5mol/LKCl methyl cellulose gel solution:Prepare 0.5mol/L KCl solution, by with solution be heated to more than 70 DEG C, then add methylcellulose into the solution of heat and (add The amount entered adds 2~3g methylcellulose by every 10mL solution).After stirring, room temperature is cooled in atmosphere and can be prepared by Gel electrolyte.
(3) manufacture of reference electrode
Rear activation seal and micropore ceramics block are sequentially fixed at sleeve pipe inner bottom part and fixed with seal, is made pottery in micropore Porcelain block and rear activation seal gap location filling water uptake expansion material;Then gel electrolyte is filled in sleeve pipe, micropore ceramics Block top;After gelled electrolyte cooling gelling, center line of the electrode body of copper cable along sleeve pipe will be welded with and inserted, then used Sealing shroud seals to the upper pipes of sleeve pipe, finally protective case is socketed in outside the lower end pipe of sleeve pipe, you can this practicality is made Built-in type reference electrode is used in new steel reinforced concrete erosion monitoring.
(4) reference electrode potential stability is studied
Saturated calcium hydroxide solution is prepared using secondary deionized water, the saturated calcium hydroxide solution prepared is placed in burning It is positioned in cup in thermostat water bath, the temperature setting of water-bath is 25 DEG C, and the reference electrode prepared is positioned in beaker. Developed reference electrode is measured using digital multimeter to change with time feelings relative to the electrode potential of saturated calomel electrode Condition, as shown in Fig. 2.Test result shows:Testing in nearly 600 hours, potential fluctuation is no more than 5mV, it is seen that is developed Reference electrode there is higher potential stability.
It is described above, the only preferable embodiment of the utility model.Certainly, the utility model can also have other more Kind embodiment, in the case of without departing substantially from the utility model spirit and its essence, any one skilled in the art, When that can make various corresponding equivalent changes and deformation according to the utility model, the right that should all belong to appended by the utility model will The protection domain asked.

Claims (6)

1. built-in type reference electrode is used in a kind of monitoring of steel reinforced concrete erosion, it is characterised in that including copper cable (1), sleeve pipe (3), Electrode body (5);The lower end pipe overcoat of described sleeve pipe (3) is connected to protective case (10), and upper pipes have been embedded in sealing shroud (2), institute State and seal dissolving mortar (11) is activated after being sequentially provided with from bottom to top in sleeve pipe (3), activate seal (9), water swelling afterwards Layer (8) and micropore ceramics block (6), wherein activation seal (9), the micropore ceramics block (6) and described sleeve pipe (3) are interior after described Seal (7) is respectively equipped with side face between wall;The electrode body (5) and described sleeve pipe (3) coaxial line, one end isolation are located at Above the micropore ceramics block (6), the other end is interspersed in sealing shroud (2), is filled with gel electrolyte (4) around it;It is described Described sleeve pipe (3) is stretched out outside in one end of copper cable (1), and the other end is interspersed in the sealing shroud (2) to be connected with electrode body (5) Connect.
2. built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring according to claim 1, it is characterised in that:Institute Electrode body (5) is stated as Ag/AgCl electrodes, Mn/MnO2Electrode or Cu saturations CuSO4Electrode.
3. built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring according to claim 1, it is characterised in that:Institute The material for stating sleeve pipe (3) and protective case (10) is polytetrafluoroethylene (PTFE).
4. built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring according to claim 1, it is characterised in that:Institute It is methyl cellulose gel electrolyte to state gel electrolyte (4).
5. built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring according to claim 1, it is characterised in that:Institute It is thickness 10mm to state micropore ceramics block (6), aperture 0.2um, the diatomite micropore ceramics of the porosity 80%.
6. built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring according to claim 1, it is characterised in that:Institute It is epoxy resin to state sealing shroud (2) and seal (7).
CN201720339105.9U 2017-04-01 2017-04-01 Built-in type reference electrode is used in a kind of steel reinforced concrete erosion monitoring Expired - Fee Related CN206945599U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106885835A (en) * 2017-04-01 2017-06-23 江苏科技大学 A kind of steel reinforced concrete erosion monitoring built-in type reference electrode and manufacture method
CN112924504A (en) * 2021-01-28 2021-06-08 江苏科技大学 Sensor for in-situ measurement of chloride ion concentration in concrete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106885835A (en) * 2017-04-01 2017-06-23 江苏科技大学 A kind of steel reinforced concrete erosion monitoring built-in type reference electrode and manufacture method
CN112924504A (en) * 2021-01-28 2021-06-08 江苏科技大学 Sensor for in-situ measurement of chloride ion concentration in concrete

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Address before: 212000 4th floor, 101 Nanxu Avenue, Runzhou District, Zhenjiang City, Jiangsu Province

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