CN201277968Y - Experiment apparatus for accelerating concrete corrosion by electrochemical process - Google Patents
Experiment apparatus for accelerating concrete corrosion by electrochemical process Download PDFInfo
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- CN201277968Y CN201277968Y CNU2008201618641U CN200820161864U CN201277968Y CN 201277968 Y CN201277968 Y CN 201277968Y CN U2008201618641 U CNU2008201618641 U CN U2008201618641U CN 200820161864 U CN200820161864 U CN 200820161864U CN 201277968 Y CN201277968 Y CN 201277968Y
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- corrosion
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Abstract
The utility model discloses a concrete electrochemical-dissolving testing apparatus comprising a power supply, a positive electrode, a negative electrode, leads and a test trough. The test trough is filled with deionized water with pH value ranging from 2 to 4; the positive electrode and the negative electrode are immersed in the deionized water and keep a certain distance; the power supply is respectively connected with the positive electrode and the negative electrode through the leads; the power supply adopts direct current; and the positive electrode and the negative electrode are titanium mesh plates. The concrete electrochemical-dissolving testing apparatus has the advantages of simple structure, convenient use, low cost, good effect, and the like and is suitable for testing and studying concrete dissolving.
Description
Technical field
The utility model belongs to civil engineering material technical field, is specifically related to the accelerating concrete corrosion by electrochemical test unit.
Background technology
Ca in the concrete (OH)
2And some other compositions can water-soluble to a certain extent (particularly soft water), and Jian Xing hydrated product and the acids in the environment or some salt generation chemical reaction can generate lyotrope in addition, and these situations promptly cause the corrosion destruction of cement concrete.Common concrete corrosion speed is slower, and the performance degradation amplitude that is caused by corrosion is lower, so the corrosion problem of normal concrete structure is not outstanding.But some water-conveyance tunnels in the hydraulic engineering, dam and the long-term concrete workses that contact with water such as container of disposing radioactive waste, its corrosion permanance must be guaranteed, otherwise are difficult in the safety of engineering and serviceable life guarantee, even cause more serious consequence.
China is since the ninth five-year plan, successively set up the important research plan of some relevant cement concretes, concrete durability problems such as concrete alkali-aggregate reaction, sulphate corrosion, freeze thawing circulation and deicer salts destruction have been carried out primary study, but related to fewer concrete corrosion permanance.Because under the natural conditions, concrete corrosion is very slow, for the ease of research, need quicken this process, but adopt the corrosion of electrochemical method accelerate concrete by certain means, study concrete corrosion endurance issues.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of accelerating concrete corrosion by electrochemical test unit.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of accelerating concrete corrosion by electrochemical test unit, it comprises power supply, anodic-cathodic, lead and test flume; The deionized water of pH 2～4 is housed in the test flume, and anodic-cathodic is immersed in the above-mentioned deionized water, the anodic-cathodic segment distance that separates each other, power supply by lead respectively the harmonizing yinyang electrode link to each other; Wherein, power supply adopts direct supply, and anodic-cathodic adopts titanium mesh plate.
Wherein, described test flume is the organic glass groove.
Wherein, described direct supply voltage 20～80V.
Wherein, the purity of described titanium mesh plate is more than 98%.
Beneficial effect: adopt device of the present utility model can make Ca (OH) in the concrete
2By constantly stripping, the sandstone that concrete surface occurs in various degree exposes, the tangible corrosion degree of depth is arranged, and that the dried water-intake rate of the concrete saturation plane after the corrosion becomes is big, ultrasonic propagation velocity reductions, anti-freezing property decline, compressive strength and tensile splitting strength reduce, and acceleration corrosion effect is obvious.The accelerating concrete corrosion by electrochemical test unit that the utility model provides is simple in structure, easy to operate, cost is low, effective, be applicable to and carry out the research work of concrete dissolved corrosion test.
Description of drawings
Fig. 1 is an accelerating concrete corrosion by electrochemical test unit synoptic diagram.
Wherein 1 is direct supply, the 2nd, organic glass groove, the 3rd, concrete sample, the 4th, the deionized water of pH 2～4, the 5th, titanium mesh plate electrode, the 6th, lead, the 7th, poly (methyl methacrylate) plate.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and Figure of description.
As shown in Figure 1, a kind of accelerating concrete corrosion by electrochemical test unit, it comprises direct supply 1, anodic-cathodic 5, lead 6 and organic glass groove 2; The deionized water 4 (using the hydrochloric acid adjust pH) of pH 2～4 is housed in the organic glass groove 2, anodic-cathodic 5 is immersed in the above-mentioned deionized water 4, anodic-cathodic 5 segment distance that separates each other, concrete sample 3 can place between the anodic-cathodic 5, and (20～80V) is continuous by lead 6 difference harmonizing yinyang electrodes 5 for direct supply 1; It is 98% above titanium mesh plate that anodic-cathodic adopts purity.
Make concrete sample, be of a size of 100mm * 100mm * 100mm, cement is 32.5 grades of Portland cements, water cement ratio 0.54.Test specimen behind the maintenance 28d, carries out the accelerating concrete corrosion by electrochemical test under standard conditions.
During test, earlier concrete sample 3 is positioned in the organic glass groove 2, the length of the length of concrete sample 3 and reactive tank 2 is complementary, and makes concrete sample place reactive tank 2 just, and reactive tank 2 is divided into two area of space of A, B.Use silicon rubber that the bottom surface and the reactive tank underseal of concrete sample are closed bonding, use silicon rubber with concrete sample and contacted two sides of reaction cell wall and reaction cell wall sealing bonding, walk around test specimen and pass through from test specimen bottom space or lateral space to prevent solution and electric current.With the titanium mesh plate is anodic-cathodic 5, places respectively in two area of space of above-mentioned A, B.The deionized water that in above-mentioned two area of space, adds pH2～4, water surface elevation is identical with the height of concrete sample, the purpose of doing so also is to walk around test specimen for solution and electric current to pass through from the test specimen headroom, therefore be stained with a poly (methyl methacrylate) plate 7 at the top of concrete sample, the length and width of this glass plate are identical with the length and width of concrete sample, also be can not walk around test specimen, carry out electrochemical reaction but pass test specimen from the top for further solution and the electric current of guaranteeing.
Embodiment 1:
Adopt the ionized water that goes (using the hydrochloric acid adjust pH) of pH2, direct supply voltage is 40V, and solution temperature is 30 ℃.Behind the energising 5d, Ca
2+Stripping quantity (with the CaO densimeter) is 444.9mg/L.
Embodiment 2:
Adopt the deionized water (using the hydrochloric acid adjust pH) of pH3, direct supply voltage is 60V, and solution temperature is 50 ℃.Behind the energising 5d, Ca
2+Stripping quantity (with the CaO densimeter) is 640.8mg/L.
Claims (4)
1, a kind of accelerating concrete corrosion by electrochemical test unit is characterized in that it comprises power supply, anodic-cathodic, lead and test flume; The deionized water of pH 2～4 is housed in the test flume, and anodic-cathodic is immersed in the above-mentioned deionized water, the anodic-cathodic segment distance that separates each other, power supply by lead respectively the harmonizing yinyang electrode link to each other; Wherein, power supply adopts direct supply, and anodic-cathodic adopts titanium mesh plate.
2, accelerating concrete corrosion by electrochemical test unit according to claim 1 is characterized in that described test flume is the organic glass groove.
3, accelerating concrete corrosion by electrochemical test unit according to claim 1 is characterized in that described direct supply voltage 20～80V.
4, accelerating concrete corrosion by electrochemical test unit according to claim 1, the purity that it is characterized in that described titanium mesh plate is more than 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201618641U CN201277968Y (en) | 2008-10-23 | 2008-10-23 | Experiment apparatus for accelerating concrete corrosion by electrochemical process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201618641U CN201277968Y (en) | 2008-10-23 | 2008-10-23 | Experiment apparatus for accelerating concrete corrosion by electrochemical process |
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| Publication Number | Publication Date |
|---|---|
| CN201277968Y true CN201277968Y (en) | 2009-07-22 |
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| CNU2008201618641U Expired - Fee Related CN201277968Y (en) | 2008-10-23 | 2008-10-23 | Experiment apparatus for accelerating concrete corrosion by electrochemical process |
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| CN (1) | CN201277968Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359772A (en) * | 2011-07-18 | 2012-02-22 | 河海大学 | Method for measuring corrosion depth of cement-based materials |
| CN107942041A (en) * | 2017-11-21 | 2018-04-20 | 黑龙江牡丹江抽水蓄能有限公司 | A kind of antidecomposition corrodes water conservancy project concrete mixing proportion design method |
-
2008
- 2008-10-23 CN CNU2008201618641U patent/CN201277968Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359772A (en) * | 2011-07-18 | 2012-02-22 | 河海大学 | Method for measuring corrosion depth of cement-based materials |
| CN102359772B (en) * | 2011-07-18 | 2013-07-03 | 河海大学 | Method for measuring corrosion depth of cement-based materials |
| CN107942041A (en) * | 2017-11-21 | 2018-04-20 | 黑龙江牡丹江抽水蓄能有限公司 | A kind of antidecomposition corrodes water conservancy project concrete mixing proportion design method |
| CN107942041B (en) * | 2017-11-21 | 2020-08-25 | 黑龙江牡丹江抽水蓄能有限公司 | Design method for mixing proportion of anti-decomposition erosion hydraulic concrete |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20111023 |