CN102175734A - Reference sensor - Google Patents
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- CN102175734A CN102175734A CN2011100453915A CN201110045391A CN102175734A CN 102175734 A CN102175734 A CN 102175734A CN 2011100453915 A CN2011100453915 A CN 2011100453915A CN 201110045391 A CN201110045391 A CN 201110045391A CN 102175734 A CN102175734 A CN 102175734A
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 51
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 51
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 51
- 239000004568 cement Substances 0.000 claims abstract description 44
- 239000000084 colloidal system Substances 0.000 claims abstract description 39
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 229910001868 water Inorganic materials 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910002804 graphite Inorganic materials 0.000 claims description 14
- 239000010439 graphite Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- 150000002118 epoxides Chemical class 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 14
- 238000005538 encapsulation Methods 0.000 abstract 4
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000009700 ping-tang Substances 0.000 description 5
- 230000003203 everyday effect Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012260 resinous material Substances 0.000 description 1
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Abstract
The invention provides a reference sensor which comprises a tube body (1), a wire (6), a cement colloid layer (2), a calcium hydroxide colloid layer (3), an electrode layer (4) and an encapsulation layer (5), wherein the cement colloid layer (2), the calcium hydroxide colloid layer (3), the electrode layer (4) and the encapsulation layer (5) are sequentially arranged in the tube body (1); a conducting layer (7) is arranged between the electrode layer (4) and the encapsulation layer (5); and one end of the wire (6) passes through the encapsulation layer (5) and is electrically connected with the conducting layer (7). In the reference sensor provided by the invention, the conducting layer is arranged above the electrode layer and the wire is inserted into the conducting layer, thus the contact area between the electrode layer and the conducting layer is increased; simultaneously, because the conductivity of the conducting layer is obviously superior to that of the material of the electrode layer, the electric contact between the wire and the conducting layer is better; and the environment of the conducting layer can protect the wire from being corroded, thus the potential stability and potential repeatability of the manufactured reference sensor are obviously improved.
Description
Technical field
The present invention relates to a kind of reference sensor, or rather, relate to a kind of reference sensor that is used to detect the xoncrete structure internal environment.
Background technology
The monitoring of xoncrete structure internal environment has great importance for the research of concrete durability.Generally,, monitor corresponding ion concentration, thereby reach the purpose of understanding the inside concrete environment by the supporting use of reference sensor and corresponding ion selective sensor.
At present, existing reference sensor comprises: body, lead and the cement colloid layer that is arranged in order in body, calcium hydroxide colloid layer, electrode layer and encapsulated layer, wherein, the material of described electrode layer is a manganese dioxide, and an end of lead passes encapsulated layer to have with electrode layer and be electrically connected.This reference sensor can be applied in the research to concrete durability, but the problem that exists is potential stability and current potential poor reproducibility.
Summary of the invention
Technical matters to be solved by this invention provides a kind of have good potential stability and the reproducible reference sensor of current potential.
In order to solve the problems of the technologies described above, a kind of reference sensor provided by the invention, the cement colloid layer that comprises body, lead and in body, be arranged in order, calcium hydroxide colloid layer, electrode layer and encapsulated layer, between described electrode layer and encapsulated layer, be provided with conductive layer, and an end of lead passes described encapsulated layer and is electrically connected with described conductive layer.
Described conductive layer 7 is made by powdered graphite, and wherein, the mean particle diameter of described powdered graphite can be the 6-16 micron, is preferably the 8-13 micron.
The thickness ratio of described conductive layer, cement colloid layer, calcium hydroxide colloid layer, electrode layer and encapsulated layer is 1: 0.5-1.5: 0.3-1.5: 0.3-1.5: 0.5-1.5.
The thickness of described conductive layer is the 5-15 millimeter.
Described electrode layer contains manganese dioxide, calcium hydroxide and water, and with respect to the manganese dioxide of 100 weight portions, the content of calcium hydroxide is the 1-10 weight portion, and the content of water is the 15-40 weight portion.
In the described electrode layer, with respect to the manganese dioxide of 100 weight portions, the content of calcium hydroxide is the 1-5 weight portion, and the content of water is the 15-20 weight portion.
Described calcium hydroxide colloid layer contains calcium hydroxide and water, and with respect to the calcium hydroxide of 100 weight portions, the content of water is the 100-200 weight portion.
Described encapsulated layer is formed by epoxy resin cure, and the epoxide number of described epoxy resin is 0.4-0.6.
Described cement colloid layer is formed after solidifying by the cement colloidal compositions, and described cement colloidal compositions contains cement and water, and with respect to the cement of 100 weight portions, the content of water is the 40-60 weight portion.
The length-diameter ratio of described body is 4-6: 1.
Adopt the reference sensor of technique scheme; by conductive layer is set above electrode layer; and lead is inserted in the conductive layer; improved the contact area between electrode layer and the conductive layer like this; simultaneously because the electric conductivity of conductive layer will be significantly better than the material of electrode layer; thereby make electrically contacting of lead and conductive layer better, and the environment of conductive layer can also do not corroded by guardwire, the potential stability of the reference sensor that makes and current potential reappearance are significantly increased.In addition, at the composition that contains manganese dioxide that use has specific composition and ratio, the potential stability of the reference sensor that makes and current potential reappearance can further improve.
In sum, the present invention is a kind of have good potential stability and current potential reappearance and reference sensor simple in structure, dependable performance.
Description of drawings
Fig. 1 is the structural representation of the reference sensor that makes among the embodiment of the invention 1-4.
Embodiment
As shown in Figure 1, reference sensor provided by the invention, this reference sensor comprises: body 1, lead 6 and the cement colloid layer 2 that is arranged in order in body 1, calcium hydroxide colloid layer 3, electrode layer 4 and encapsulated layer 5, reference sensor also comprises conductive layer 7, conductive layer 7 is between electrode layer 4 and encapsulated layer 5, and an end of lead 6 passes encapsulated layer 5 and is electrically connected with conductive layer 7.
The present inventor has carried out deep research to reference sensor; find why aspect poor-performing such as potential stability and reappearance of existing reference sensor; be because the electric conductivity between lead 6 and the electrode layer 4 is relatively poor; in existing reference sensor; lead 6 directly is inserted in the electrode layer 4; because electrode layer is made up of manganese dioxide; its electric conductivity is unsatisfactory; thereby make the electric conductivity between lead 6 and the electrode layer 4 relatively poor; in addition; because lead 6 directly is inserted in the electrode layer 4; the environment of electrode layer 4 can make lead 6 be corroded; thereby make the current potential current potential of reaction electrode layer electrode reaction really of test gained; and the present invention is by being provided with conductive layer 7 above electrode layer 4; and lead 6 is inserted in the conductive layer 7; improved the contact area between electrode layer 4 and the conductive layer 7 like this; simultaneously because the electric conductivity of conductive layer 7 will be significantly better than the material of electrode layer 4; thereby make lead 6 better with electrically contacting of conductive layer 7; and the environment of conductive layer 7 is can also guardwire 6 not perishable, thereby the potential stability of the reference sensor that makes and current potential reappearance are significantly increased.
According to the present invention, conductive layer 7 is made by powdered graphite, and the mean particle diameter of powdered graphite is the 6-16 micron, is preferably the 8-13 micron.
According to the present invention, the material of electrode layer 4 is made by manganese dioxide powder, and wherein, the mean particle diameter of manganese dioxide powder is the 0.7-1.7 micron, is preferably the 0.9-1.5 micron, and the purity of manganese dioxide is 97%-99%
In a kind of preferred implementation, electrode layer 4 contains manganese dioxide, calcium hydroxide and water, and with respect to the manganese dioxide of 100 weight portions, the content of calcium hydroxide is the 1-10 weight portion, and the content of water is the 15-40 weight portion; Preferably, with respect to the manganese dioxide of 100 weight portions, the content of calcium hydroxide is the 1-5 weight portion, and the content of water is the 15-20 weight portion.
In addition, the present inventor finds, uses the composition that contains manganese dioxide with specific composition and ratio, and the potential stability of the reference sensor that makes and current potential reappearance can further improve.
According to the present invention, the thickness ratio of conductive layer 7, cement colloid layer 2, calcium hydroxide colloid layer 3, electrode layer 4 and encapsulated layer 5 is 1: 0.5-1.5: 0.3-1.5: 0.3-1.5: 0.5-1.5, in such proportional range, reference sensor has better potential stability and current potential reappearance.Under preferred situation, the thickness of conductive layer 7 is the 5-15 millimeter, more preferably the 8-12 millimeter.
According to the present invention, calcium hydroxide colloid layer 3 contains calcium hydroxide and water, wherein, the content ratio of calcium hydroxide and water can in very large range change, but under the preferable case, with respect to the calcium hydroxide of 100 weight portions, the content of water is the 100-200 weight portion, more preferably the 100-150 weight portion.
Among the present invention, the effect of encapsulated layer 5 is to be used for the end of reference sensor is sealed, and the material of encapsulated layer 5 has no particular limits, and under the preferable case, encapsulated layer 5 is formed by epoxy resin cure, and the epoxide number of epoxy resin is 0.4-0.6.
In addition, the effect of cement colloid layer 2 is in order to seal the end of reference sensor, and thereby the ion that allows to detect is through entering reference sensor, and cement colloid layer 2 is formed after solidifying by the cement colloidal compositions, and the cement colloidal compositions contains cement and water, wherein, the content ratio of cement and water can in very large range change, for example, and with respect to the cement of 100 weight portions, the content of water is the 40-60 weight portion, more preferably the 40-50 weight portion.
The kind of cement is conventionally known to one of skill in the art, and can be commercially available, for example, and the cement of 32.5 trades mark that Changsha Ping Tang cement company limited produces.
According to the present invention, the material requirements of body 1 can not with metal or metal oxide generation chemical reaction, have certain intensity and each layer structure that is positioned at its inside be damaged and do not see through ion and get final product, for example, can be preferably pvc pipe for pvc pipe, resinous material Guan Douke.The size of body 1 can in very large range change, but for easy to use, under the preferable case, the length-diameter ratio of body 1 is 2-8: 1, and 4-6 more preferably: 1.
The kind of lead 6 is conventionally known to one of skill in the art, for example, is the metallic copper lead.
Among the present invention, the preparation method of reference sensor can comprise: a terminal A of body 1 is fixed on the fixed mesa, at another end of body 1 (B end) filling concrete colloidal compositions and make its curing, forms cement colloid layer 2; In body 1, introduce the potpourri of calcium hydroxide and water by another end (B end) of body 1, form calcium hydroxide colloid layer 3; Another end (B end) by body 1 is introduced manganese dioxide powder in body 1, form electrode layer 4; Another end (B end) by body 1 is introduced powdered graphite in body 1, form conductive layer 7; Another end (B end) by body 1 is inserted into lead 6 in the formation conductive layer 7, introduces end-blocking layer material (as epoxy resin) then and make its curing in body 1, forms end-blocking layer 5.
In addition, in another kind of preferred implementation, the preparation method of reference sensor can comprise: a terminal A of body 1 is fixed on the fixed mesa, at another end of body 1 (B end) filling concrete colloidal compositions and make its curing, forms cement colloid layer 2; In body 1, introduce the potpourri of calcium hydroxide and water by the end (B end) of body 1, form calcium hydroxide colloid layer 3; In body 1, introduce the potpourri of manganese dioxide, calcium hydroxide and water by another end (B end) of body 1, form electrode layer 4; Another end (B end) by body 1 is introduced powdered graphite in body 1, form conductive layer 7; Another end (B end) by body 1 is inserted into lead 6 in the formation conductive layer 7, introduces end-blocking layer material (as epoxy resin) then and make its curing in body 1, forms end-blocking layer 5.
According to the present invention, the material and the proportion of composing of body 1, lead 6 and the cement colloid layer 2 that in body 1, is arranged in order, calcium hydroxide colloid layer 3, electrode layer 4 and encapsulated layer 5, existing hereinbefore the description do not repeat them here.
Below by specific embodiment the present invention is carried out more detailed description.
Embodiment 1:
(1) be that an end (B end) the filling concrete colloidal compositions of 5 centimetres pvc pipe (mean diameter is 1 centimetre) (consists of: the cement of 100 weight portions (Changsha Ping Tang cement company limited in length, 32.5 type) and the water of 60 weight portions), place its curing of 1 angel, form cement colloid layer 2 (thickness is 0.8 centimetre);
(2) in body 1, introduce the potpourri (water of the calcium hydroxide of 100 weight portions and 200 weight portions) of calcium hydroxide and water by the end (B end) of pvc pipe, place and formed calcium hydroxide colloid layer 3 (thickness is 1.2 centimetres) in 1 day;
(3) in body 1, introduce manganese dioxide powder (mean particle diameter is 1.12 microns, and purity is 97.85%) by the end (B end) of pvc pipe, form electrode layer 4 (thickness is 1.0 centimetres);
(4) in body 1, introduce powdered graphite (mean particle diameter is 11.5 microns, and purity is 99.99%) by the end (B end) of pvc pipe, form conductive layer 7 (thickness is 1.0 centimetres);
(5) end (B end) by pvc pipe is inserted into lead 6 in the conductive layer 7 of formation, introduces end-blocking layer material (as epoxy resin) then and make its curing in body 1, forms end-blocking layer 5 (thickness is 1.0 centimetres).Repeat said process three times, obtain reference sensor B1-1, B1-2 and B1-3.
Comparative Examples 1:
Prepare reference sensor according to the method identical with embodiment 1, difference is not comprise conductive layer 7, and lead 6 is inserted in the electrode layer 4.Repeat said process three times, obtain reference sensor CB1-1, CB1-2 and CB1-3.
Embodiment 2:
(1) be that an end (B end) the filling concrete colloidal compositions of 5 centimetres pvc pipe (mean diameter is 1 centimetre) (consists of: the cement of 100 weight portions (Changsha Ping Tang cement company limited in length, 32.5 type) and the water of 60 weight portions), place its curing of 1 angel, form cement colloid layer 2 (thickness is 0.5 centimetre);
(2) in body 1, introduce the potpourri (water of the calcium hydroxide of 100 weight portions and 200 weight portions) of calcium hydroxide and water by the end (B end) of pvc pipe, place and formed calcium hydroxide colloid layer 3 (thickness is 1.5 centimetres) in 1 day;
(3) (mean particle diameter is 1.12 microns to introduce manganese dioxide powder by the end (B end) of pvc pipe in body 1, purity is 97.85%), the potpourri of calcium hydroxide and water (wherein, manganese dioxide with respect to 100 weight portions, the content of calcium hydroxide is 10 weight portions, the content of water is 40 weight portions), form electrode layer 4 (thickness is 1.2 centimetres);
(4) in body 1, introduce powdered graphite (mean particle diameter is 11.5 microns, and purity is 99.99%) by another end (B end) of pvc pipe, form conductive layer 7 (thickness is 1.0 centimetres);
(5) another end (B end) by pvc pipe is inserted into lead 6 in the conductive layer 7 of formation, introduces end-blocking layer material (as epoxy resin) then and make its curing in body 1, forms end-blocking layer 5 (thickness is 0.8 centimetre).Repeat said process three times, obtain reference sensor B2-1, B2-2 and B2-3.
Embodiment 3:
(1) be that an end (B end) the filling concrete colloidal compositions of 5 centimetres pvc pipe (mean diameter is 1 centimetre) (consists of: the cement of 100 weight portions (Changsha Ping Tang cement company limited in length, 32.5 type) and the water of 50 weight portions), place its curing of 1 angel, form cement colloid layer 2 (thickness is 1.2 centimetres);
(2) in body 1, introduce the potpourri (water of the calcium hydroxide of 100 weight portions and 150 weight portions) of calcium hydroxide and water by the end (B end) of pvc pipe, place and formed calcium hydroxide colloid layer 3 (thickness is 0.8 centimetre) in 1 day;
(3) (mean particle diameter is 1.12 microns to introduce manganese dioxide powder by the end (B end) of pvc pipe in body 1, purity is 97.85%), the potpourri of calcium hydroxide and water (wherein, manganese dioxide with respect to 100 weight portions, the content of calcium hydroxide is 5 weight portions, the content of water is 20 weight portions), form electrode layer 4 (thickness is 1.0 centimetres);
(4) in body 1, introduce powdered graphite (mean particle diameter is 11.5 microns, and purity is 99.99%) by the end (B end) of pvc pipe, form conductive layer 7 (thickness is 1.0 centimetres);
(5) another end (B end) by pvc pipe is inserted into lead 6 in the conductive layer 7 of formation, introduces end-blocking layer material (as epoxy resin) then and make its curing in body 1, forms end-blocking layer 5 (thickness is 1.0 centimetres).Repeat said process three times, obtain reference sensor B3-1, B3-2 and B3-3.
Embodiment 4:
(1) be that end (B end) the filling concrete colloidal compositions of 5 centimetres pvc pipe (mean diameter is 1 centimetre) (consists of: the cement of 100 weight portions (Changsha Ping Tang cement company limited in length, 32.5 type) and the water of 40 weight portions), place its curing of 1 angel, form cement colloid layer 2 (thickness is 1 centimetre);
(2) in body 1, introduce the potpourri (water of the calcium hydroxide of 100 weight portions and 100 weight portions) of calcium hydroxide and water by the end (B end) of pvc pipe, place and formed calcium hydroxide colloid layer 3 (thickness is 1 centimetre) in 1 day;
(3) (mean particle diameter is 1.12 microns to introduce manganese dioxide powder by the end (B end) of pvc pipe in body 1, purity is 97.85%), the potpourri of calcium hydroxide and water (wherein, manganese dioxide with respect to 100 weight portions, the content of calcium hydroxide is 1 weight portion, the content of water is 15 weight portions), form electrode layer 4 (thickness is 1 centimetre);
(4) in body 1, introduce powdered graphite (mean particle diameter is 11.5 microns, and purity is 99.99%) by another end (B end) of pvc pipe, form conductive layer 7 (thickness is 1 centimetre);
(5) another end (B end) by pvc pipe is inserted into lead 6 in the conductive layer 7 of formation, introduces end-blocking layer material (as epoxy resin) then and make its curing in body 1, forms end-blocking layer 5 (thickness is 1 centimetre).Repeat said process three times, obtain reference sensor B4-1, B4-2 and B4-3.
Adopt following method to detect the potential stability and the current potential reappearance of the reference sensor that embodiment 1-4 and Comparative Examples 1 make, each embodiment makes 3 sensors, corresponding embodiment 1-4, sensor number is respectively B1-1, and 2,3 to B2-1,2,3, test result is as shown in table 1, and Comparative Examples 1 test result is shown in Table 2.
(1) with the mercurous chloride electrode is contrast electrode, manganese dioxide is working electrode, the PZ93A-2 digital voltmeter of in concrete simulation solution, producing with Shanghai Qian Feng Electron equipment Co., Ltd, test the current potential of a reference sensor every day, relatively the potential change of each sensor every day is checked its potential stability with this.
(2) with the mercurous chloride electrode be contrast electrode, manganese dioxide is working electrode, the PZ93A-2 digital voltmeter of in concrete simulation solution, producing with Shanghai Qian Feng Electron equipment Co., Ltd, every day, the current potential of reference sensor was once made in test by oneself, compare the potential change of three every group sensor every day, check its current potential reappearance with this.
Table 1
The reference sensor that Comparative Examples 1 makes is numbered CB1-1, CB1-2 and CB1-3, tests its potential stability, current potential reappearance, and the result is as shown in table 2.
Table 2
| Time (fate) | CB1-1 | CB1-2 | CB1-3 |
| The 1st day | 0.007 | 0.063 | 0.005 |
| The 2nd day | 0.016 | 0.065 | 0.007 |
| The 3rd day | 0.008 | 0.056 | 0.007 |
| The 4th day | 0.013 | 0.073 | 0.007 |
| The 5th day | 0.012 | 0.074 | 0.006 |
| The 6th day | 0.007 | 0.052 | 0.006 |
| The 7th day | -0.023 | 0.038 | 0.004 |
| The 8th day | 0.014 | 0.044 | Overflow |
| The 9th day | -0.031 | Overflow | 0.009 |
| The 10th day | 0.032 | 0.038 | 0.007 |
| The 11st day | Overflow | 0.045 | Overflow |
| The 12nd day | 0.057 | Overflow | Overflow |
| The 13rd day | 0.051 | 0.042 | 0.014 |
| The 14th day | 0.078 | 0.036 | 0.016 |
| The 15th day | 0.069 | 0.04 | Overflow |
| The 16th day | Overflow | Overflow | Overflow |
| The 17th day | Overflow | Overflow | Overflow |
| The 18th day | Overflow | Overflow | Overflow |
| The 19th day | Overflow | Overflow | Overflow |
| The 20th day | Overflow | Overflow | Overflow |
From the data of above-mentioned table 1 and table 2 as can be seen, compare with CB1-3 with contrast electrode CB1-1, the CB1-2 that Comparative Examples 1 makes, the potential stability of the reference sensor that embodiment of the invention 1-4 makes and current potential reappearance are significantly increased.In addition, compare with B1-3 with contrast electrode B1-1, B1-2 that embodiment 1 makes, use have specific composition and ratio contain the composition of manganese dioxide the time (embodiment 2-4), the potential stability of the reference sensor that makes and current potential reappearance can further improve.
Claims (10)
1. reference sensor, comprise body (1), lead (6) and the cement colloid layer (2) that in body (1), is arranged in order, calcium hydroxide colloid layer (3), electrode layer (4) and encapsulated layer (5), it is characterized in that: between described electrode layer (4) and described encapsulated layer (5), be provided with conductive layer (7), and an end of described lead (6) passes described encapsulated layer (5) and is electrically connected with described conductive layer (7).
2. reference sensor according to claim 1 is characterized in that: described conductive layer (7) is made by powdered graphite, and the mean particle diameter of described powdered graphite is the 6-16 micron.
3. reference sensor according to claim 1 is characterized in that: described conductive layer (7) is made by powdered graphite, and the mean particle diameter of described powdered graphite is the 8-13 micron.
4. according to claim 1,2 or 3 described reference sensor, it is characterized in that: the thickness ratio of described conductive layer (7), cement colloid layer (2), calcium hydroxide colloid layer (3), electrode layer (4) and encapsulated layer (5) is 1: 0.5-1.5: 0.3-1.5: 0.3-1.5: 0.5-1.5.
5. according to claim 1,2 or 3 described reference sensor, it is characterized in that: the thickness of described conductive layer (7) is the 5-15 millimeter.
6. according to claim 1,2 or 3 described reference sensor, it is characterized in that: described electrode layer (4) contains manganese dioxide, calcium hydroxide and water, with respect to the manganese dioxide of 100 weight portions, the content of calcium hydroxide is the 1-10 weight portion, and the content of water is the 15-40 weight portion.
7. according to claim 1,2 or 3 described reference sensor, it is characterized in that: described calcium hydroxide colloid layer (3) contains calcium hydroxide and water, and with respect to the calcium hydroxide of 100 weight portions, the content of water is the 100-200 weight portion.
8. according to claim 1,2 or 3 described reference sensor, it is characterized in that: described encapsulated layer (5) is formed by epoxy resin cure, and the epoxide number of described epoxy resin is 0.4-0.6.
9. according to claim 1,2 or 3 described reference sensor, it is characterized in that: described cement colloid layer (2) is formed after solidifying by the cement colloidal compositions, described cement colloidal compositions contains cement and water, with respect to the cement of 100 weight portions, the content of water is the 40-60 weight portion.
10. according to claim 1,2 or 3 described reference sensor, it is characterized in that: the length-diameter ratio of described body (1) is 4-6: 1.
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| CN102721642A (en) * | 2012-07-13 | 2012-10-10 | 中南大学 | Sensor device for long-term monitoring of reinforcement corrosion conditions and applied inside concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183559A (en) * | 2011-03-17 | 2011-09-14 | 中国神华能源股份有限公司 | Electrode material composition for reference sensor and reference sensor |
| CN102721642A (en) * | 2012-07-13 | 2012-10-10 | 中南大学 | Sensor device for long-term monitoring of reinforcement corrosion conditions and applied inside concrete |
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