CN106596650A - Graphene/cement composite material-based apparatus and method for detecting content of chloride ions in concrete - Google Patents
Graphene/cement composite material-based apparatus and method for detecting content of chloride ions in concrete Download PDFInfo
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- CN106596650A CN106596650A CN201611126800.3A CN201611126800A CN106596650A CN 106596650 A CN106596650 A CN 106596650A CN 201611126800 A CN201611126800 A CN 201611126800A CN 106596650 A CN106596650 A CN 106596650A
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- 239000004568 cement Substances 0.000 title claims abstract description 107
- 239000002131 composite material Substances 0.000 title claims abstract description 107
- 239000004567 concrete Substances 0.000 title claims abstract description 74
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 12
- 239000013530 defoamer Substances 0.000 claims description 9
- 235000013312 flour Nutrition 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 claims 1
- 239000010439 graphite Substances 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 2
- 239000002518 antifoaming agent Substances 0.000 abstract 2
- 239000011863 silicon-based powder Substances 0.000 abstract 2
- 229910001220 stainless steel Inorganic materials 0.000 abstract 2
- 239000010935 stainless steel Substances 0.000 abstract 2
- 238000012360 testing method Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000000157 electrochemical-induced impedance spectroscopy Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000000627 alternating current impedance spectroscopy Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001453 impedance spectrum Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a graphene/cement composite material-based apparatus for detecting the content of chloride ions in concrete. The apparatus comprises a composite material and a humidity sensor which are positioned in a concrete protection layer, and also comprises an impedance tester and a humidity detector which are positioned outside the concrete; the composite material is a cuboid, stainless steel nets are respectively laminated to two horizontal end surfaces of the cuboid, the stainless steel nets are respectively welded with leading wires, the composite material is connected with the impedance tester outside the concrete through the leading wires, and the composite material is coated with a sealing layer, wherein the composite material comprises cement, and graphene, silicon powder and an antifoaming agent doped in the cement, the doped amount of graphene is 0.5-3% of the mass of the cement, the doped amount of the silicon powder is 5-20% of the mass of the cement, and the doped amount of the antifoaming agent is 0.05-0.3% of the mass of the cement. The detection apparatus is compatible with concrete environment, and can monitor the concentration of the chloride ions in different humidity environments in real time.
Description
Technical field
The present invention relates to a kind of detection means based on Graphene/cement composite material to Chloride Ion in Concrete content,
Further relate to a kind of detection method based on Graphene/cement composite material to Chloride Ion in Concrete content.
Background technology
Steel bar corrosion is the principal element for affecting xoncrete structure safety, the military service longevity of serious threat xoncrete structure
Life.It is the main cause for causing steel bar corrosion that chloride ion is invaded, when the critical concentration that chlorine ion concentration exceedes steel bar corrosion will
Induction corrosion.Therefore, the chloride ion content in real-time monitoring concrete cover, is Durability Assessment of Reinforced Concrete Structure and residue
Biometry provides data supporting, it is ensured that the durability and service safety of xoncrete structure has great practical significance.
The method of traditional detection chloride ions concentration of concrete is that destruction takes powder method, and this method is time-consuming, laborious, more sternly
Weight is that destructive consequence can be produced to xoncrete structure, while cannot also realize real-time monitoring.And adopt chloride ion selectivity
Although electrode, Fiber Optic Sensor etc. can at short notice detect that the factors such as chloride ions concentration of concrete, humidity are very big
The accuracy of measurement result can be affected in degree；Larger cause very because sensor is different with concrete environment poor mechanical property in addition
Many compatibility issues.Based on this, being badly in need of a kind of and concrete environmental compatible simultaneously can be under different humidity environment to chloride ion
The sensor that concentration evolution is monitored.
The content of the invention
Goal of the invention：The technical problem to be solved is to provide a kind of based on Graphene/cement composite material pair
The detection means of Chloride Ion in Concrete content, the detection means can not only be with concrete environmental compatible, moreover it is possible in different humidity
Real-time monitoring is carried out to chlorine ion concentration development under environment.
The technical problem also to be solved of the invention is to provide a kind of Graphene/cement composite material that is based on to chlorine in concrete
The detection method of ion concentration.
To solve above-mentioned technical problem, the technology used in the present invention means are as follows：
A kind of detection means based on Graphene/cement composite material to Chloride Ion in Concrete content, including positioned at mixed
Composite and humidity sensor in solidifying protective soil layer, also includes being located at the impedance instrument and Humidity Detection outside concrete
Instrument；The composite is cuboid, and the cuboid level is fitted with respectively stainless (steel) wire on two end faces, described stainless
Wire is respectively welded on steel mesh, the composite is connected by wire with the impedance instrument outside concrete, described multiple
Sealant is also wrapped on outside condensation material；Wherein, the composite by cement and the Graphene being entrained in cement, silica flour and
Defoamer is constituted, and the doping of the Graphene is the 0.5～3% of cement quality, the doping of silica flour for cement quality 5～
20%, the doping of defoamer is the 0.05～0.3% of cement quality.
Wherein, the stainless (steel) wire gauge of wire is 10～1250 mesh, and the aperture of stainless (steel) wire is 800～2000 mesh.
Wherein, the cuboid level is square to two end faces, and the foursquare length of side is 10～30mm.
Wherein, a length of 30～50mm of the cuboid.
Wherein, the sealant is epoxy sealing layer.
Wherein, the Graphene is single-layer graphene or Graphene that the number of plies is 2～5 layers.
A kind of detection method based on Graphene/cement composite material to Chloride Ion in Concrete content, including following step
Suddenly：
Step 1, builds detection means：
Mix toward cement to be formed the Graphene of cement quality 0.5～3%, cement quality 5～20% silica flour with
And the defoamer of cement quality 0.05～0.3%, obtain cement composite material；Cement composite material to be formed is in cuboid,
Stainless (steel) wire is brought into close contact on two end faces in cuboid level in cement composite material forming process, stainless (steel) wire is welded respectively
Connect wire；By six end faces of whole cuboid and the junction whole of stainless (steel) wire and wire after cement composite material hardening
Sealing；Cement composite material after hardening and humidity sensor are embedded in concrete, wire stretches out connection from concrete
To impedance instrument, humidity measurement instrument is set outside concrete；
Step 2, it is 5～20mV to apply sinusoid potential amplitude, and frequency range is 0.001Hz～1000kHz, humidity measurement instrument
Operating temperature is -40 DEG C～85 DEG C；
Step 3, by impedance instrument the Nyquist spectrograms of cement composite material are obtained, from the upper 1～30Hz scopes of figure
Real impedance as cement composite material resistance；
Step 4, sets up the relation of cement composite material electrical conductivity and chloride ion content under the conditions of relative humidity 0～90%
Figure, by monitoring reality of the conductivity variations realization of cement composite material to Chloride Ion in Concrete content under different humidity state
When monitor.
Wherein, in step 1, the cement composite material after hardening is sealed using epoxy resin.
Wherein, the stainless (steel) wire gauge of wire is 10～1250 mesh, and the aperture of stainless (steel) wire is 800～2000 mesh.
Compared with the existing technology, technical solution of the present invention have the advantage that for：
Detection means of the present invention passes through the electrical conductance for determining cement composite material so as to quickly, nondestructively detect concrete
The situation of change of middle chloride ion content, such that it is able to Accurate Prediction the chloride ion that reinforced concrete structure is subject to during service is gone out
Erosion degree, and then concrete performance is estimated and is diagnosed；In addition, cement composite material and modulus of elasticity of concrete, heat
Expansion coefficient similar, therefore there is good compatibility with concrete.
Description of the drawings
Fig. 1 is the microscopic appearance figure of cement composite material of the present invention；
Fig. 2 is the structural representation of cement composite material in detection means of the present invention；
Fig. 3 is the structural representation of detection means of the present invention；
Fig. 4 is the electrochemical impedance spectrogram I of detection means of the present invention cement composite material under different humidity state；
Fig. 5 is the electrochemical impedance spectrogram II of detection means of the present invention cement composite material under different humidity state；
Fig. 6 is the electrochemical impedance spectrogram III of detection means of the present invention cement composite material under different humidity state；
Fig. 7 is the electrochemical impedance spectrogram IV of detection means of the present invention cement composite material under different humidity state；
Fig. 8 is the pass of detection means of the present invention cement composite material electrical conductivity and chloride ion content under different humidity state
System's figure；
Fig. 9 is that detection means of the present invention is placed in chloride solution, the electrochemical impedance of cement composite material in concrete
Compose with the variation diagram of soak time；
Figure 10 is the graph of a relation of chloride ion content and Chloride Ion in Concrete content in cement composite material of the present invention.
Specific embodiment
Technical scheme is described further below in conjunction with accompanying drawing, but scope of the present invention
It is not limited thereto.
As shown in Figures 1 to 3, the present invention is based on detection of the Graphene/cement composite material to Chloride Ion in Concrete content
Device, including composite 1 and humidity sensor 6 in the protective layer of concrete 5, also includes being located at outside concrete 5
Impedance instrument 4 and humidity measurement instrument 7；Composite 1 is cuboid, and a length of 30～0mm of cuboid, preferred 30mm are rectangular
Body level to two end faces are square, and the foursquare length of side is 10～30mm, preferential 10mm, and cuboid level is to two end faces
Upper to be fitted with stainless (steel) wire 2 respectively, the area of stainless (steel) wire 2 is consistent with the face area that it is fitted, the steel wire of stainless (steel) wire 2 it is straight
Footpath is 10～1250 mesh, and preferably 800 mesh, the aperture of stainless (steel) wire is 800～2000 mesh, and on stainless (steel) wire 2 copper is respectively welded
Wire 3, composite 1 is connected by wire 3 with the impedance instrument 4 outside concrete 5, is also wrapped on outside composite 1 close
Sealing 8；Wherein, composite 1 is made up of cement and the Graphene being entrained in cement, silica flour and defoamer, Graphene
Doping is the 0.5～3%, preferably 2% of cement quality, and the doping of silica flour is the 5～20%, preferably 10% of cement quality,
The doping of defoamer is the 0.05～0.3%, preferably 0.15% of cement quality, and Graphene is single-layer graphene or the number of plies is 2
～5 layers of Graphene.
The relation of Electrical Conductivity of Composites and chloride ion content is demarcated under the conditions of different humidity, by composite and humidity
Sensor is compound to be embedded in concrete, is connected to electrochemical impedance spectroscopy tester and humidity measurement instrument, the electrification of composite
Learn impedance spectrum to determine by electrochemical impedance spectroscopy tester, humidity sensor is determined by long-range humidity measurement instrument, by determining
Electrical Conductivity of Composites change so as to monitor different humidity state under Chloride Ion in Concrete content development.
The present invention is based on detection method of the Graphene/cement composite material to Chloride Ion in Concrete content, including as follows
Step：
Step 1, builds detection means：
Mix toward cement to be formed the Graphene of cement quality 0.5～3%, cement quality 5～20% silica flour with
And the defoamer of cement quality 0.05～0.3%, obtain cement composite material；Cement composite material to be formed is in cuboid,
Stainless (steel) wire is brought into close contact on two end faces in cuboid level in cement composite material forming process, stainless (steel) wire is welded respectively
Connect wire；By six end faces of whole cuboid and the junction whole of stainless (steel) wire and wire after cement composite material hardening
Use epoxy sealing；Cement composite material after hardening and humidity sensor are embedded in concrete, wire is from concrete
In stretch out and be connected to impedance instrument, humidity measurement instrument is set outside concrete；
Step 2, applies sinusoid potential amplitude for 5～20mV (relative to OCP), preferred 10mV, and frequency range is
0.001Hz～1000kHz, preferred 0.01Hz-100kHz, humidity measurement instrument operating temperature is -40 DEG C～85 DEG C；
Step 3, by impedance instrument the Nyquist spectrograms of cement composite material are obtained, from the upper 1～30Hz scopes of figure
Real impedance as cement composite material resistance, preferred 11Hz；
Step 4, sets up the relation of cement composite material electrical conductivity and chloride ion content under the conditions of relative humidity 0～90%
Figure, by monitoring reality of the conductivity variations realization of cement composite material to Chloride Ion in Concrete content under different humidity state
When monitor.
Embodiment 1
It is the cement composite material of cement quality 2% from Graphene doping, mixes respectively during cement composite material molding
Enter the chloride ion that relative cement quality is 0,0.05,0.10,0.50,1 and 3%, it is relative in 0,50,70 and 90% after conserving 28 days
The electrochemical impedance spectroscopy of cement composite material is tested in the environment of humidity.
Fig. 4～7 are the electrochemical impedance spectrogram of cement composite material under different humidity state；From the corresponding points of selection 11Hz
Abscissa (real impedance) as cement composite material resistance, such as R in Fig. 4～7DCIt is shown, the R of high frequency regioncuspIt is substantially little
In RDC, this is because discontiguous conducting particles also produces electricity stream under high frequency so that the resistance value of whole system is reduced, therefore select
Low-frequency resistance because sample dimensions affect very big on resistance value (R), therefore is characterized as system resistance using electrical conductivity (σ)
The electric conductivity of test specimen, shown in mutual relation such as formula (1)：
Wherein, ρ-composite material resistance rate；A- composite areas, take 1cm2；L- composite length, takes 3cm.
Fig. 8 is the graph of a relation of cement composite material electrical conductivity and chloride ion content under different humidity state, while various wet
The fit equation of electrical conductivity and chloride ion content is also presented on figure under degree environment, table 1 be itemized in each fit equation and
Fit value (R2), Electrical Conductivity of Composites increases with the increase of chloride ion content, and electrical conductivity contains with chloride ion
Amount has exponent relation, and fit value is all higher than 0.9.Table 1 shows that fit equation has very high fitting degree, more reliably.It is logical
The relative humidity for determining composite use environment is crossed, is contained with chloride ion based on electrical conductivity under the different moisture levels environmental condition for obtaining
The relation of amount, can go out chloride ions concentration of concrete by the monitored conductivity of cement composite material.
Embodiment 2
Prepare Graphene doping be cement quality 2% cement composite material, 100 × 100 × 100mm of molding cube
Body concrete test specimen, concrete mix is cement: water: sand: stone=300: 150: 650: 1200kg.Use in 5 faces of concrete
Marine glue is sealed, and stays the next non-face that pours as exposure, and cement composite material distance from top exposure is 2cm.By coagulation
Native test specimen is immersed in the NaCl solution of 5% mass fraction, the test compound when soak time is 4,8,12,20,28 and 36 weeks
The electrochemical impedance spectroscopy of material, while taking the total chloridion content that powder tests concrete.
Fig. 9 is placed in the concrete sample of the present embodiment 2 in chloride solution, the electrochemistry resistance of cement composite material in concrete
It is anti-to compose with the variation diagram of soak time；With the growth of soak time, composite material resistance value is gradually lowered, that is, electrical conductivity
Incrementally increase.Chlorine in concrete sample is extrapolated from the relational model of the electrical conductivity under 90% damp condition and chloride ion content
Ion concentration, and takes the concrete chloride ion content contrast that powder obtains, and comparing result as shown in table 2, finds composite conductance
The chloride ion content that rate is calculated is closer to Chloride Ion in Concrete content, and error is less than 5%.Figure 10 is composite chlorine
Ion concentrationWith Chloride Ion in Concrete contentGraph of a relation, fitting is obtained shown in relation such as formula (2) between the two：
Chloride ion content is modified in the composite that the relation pair expressed by formula (2) is obtained, so as to more preparatively
Predict Chloride Ion in Concrete content.
Electrical Conductivity of Composites and chloride ion content relation under the different humidity conditions Ambient of table 1：
The composite calculated after the different soak times of table 2 and concrete chloride ion content (relative to cement quality)：
Detection means of the present invention using the cement composite material of 10 × 10 × 30mm of molding as sensing electrode, in electrode two
Embedding stainless (steel) wire on end face, using AC impedance spectroscopy technique the electrical conductivity of sensing electrode is obtained；It is embedded in concrete simultaneously
Sensing electrode and humidity sensor, based on electrical conductivity under the conditions of different humidity and the response relation of chlorine ion concentration, by determining
Electrical Conductivity of Composites change and then the change of monitoring chloride ion content.The biography that the present invention is fabricated to using cement-base composite material
Sense material, the elastic modelling quantity and similar thermal expansion coefficient with concrete；Belong to non-destructive monitoring technology, structure itself will not be produced
Destruction；Measurement process response is fast, reliable results；Can remotely detect Chloride Ion in Concrete under different humidity situation simultaneously
Content, the value with popularization and application.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to the present invention
The restriction of embodiment.For those of ordinary skill in the field, it can also be made on the basis of the above description
The change or variation of its multi-form.There is no need to be exhaustive to all of embodiment.And these belong to this
Obvious change that bright spirit is extended out or among changing still in protection scope of the present invention.
Claims (9)
1. a kind of detection means based on Graphene/cement composite material to Chloride Ion in Concrete content, it is characterised in that：Bag
Include composite and humidity sensor in concrete cover, also include be located at concrete outside impedance instrument and
Humidity measurement instrument；The composite is cuboid, and the cuboid level is fitted with respectively stainless (steel) wire on two end faces,
Wire is respectively welded on the stainless (steel) wire, the composite is connected by wire with the impedance instrument outside concrete
Connect, outside the composite sealant is also wrapped on；Wherein, the composite is by cement and the graphite being entrained in cement
Alkene, silica flour and defoamer composition, the doping of the Graphene is the 0.5～3% of cement quality, and the doping of silica flour is cement
The 5～20% of quality, the doping of defoamer is the 0.05～0.3% of cement quality.
2. the detection based on Graphene/cement composite material to Chloride Ion in Concrete content according to claim 1 is filled
Put, it is characterised in that：The stainless (steel) wire gauge of wire is 10～1250 mesh, and the aperture of stainless (steel) wire is 800～2000 mesh.
3. the detection based on Graphene/cement composite material to Chloride Ion in Concrete content according to claim 1 is filled
Put, it is characterised in that：The cuboid level to two end faces are square, and the foursquare length of side is 10～30mm.
4. the detection based on Graphene/cement composite material to Chloride Ion in Concrete content according to claim 1 is filled
Put, it is characterised in that：A length of 30～50mm of the cuboid.
5. the detection based on Graphene/cement composite material to Chloride Ion in Concrete content according to claim 1 is filled
Put, it is characterised in that：The sealant is epoxy sealing layer.
6. the detection based on Graphene/cement composite material to Chloride Ion in Concrete content according to claim 1 is filled
Put, it is characterised in that：The Graphene is single-layer graphene or Graphene that the number of plies is 2～5 layers.
7. a kind of detection method based on Graphene/cement composite material to Chloride Ion in Concrete content, it is characterised in that bag
Include following steps：
Step 1, builds detection means：
Graphene, the silica flour of cement quality 5～20% and the water of cement quality 0.5～3% are mixed toward cement to be formed
The defoamer of shale amount 0.05～0.3%, obtains cement composite material；Cement composite material to be formed is in cuboid, cement
Stainless (steel) wire is brought into close contact on two end faces in cuboid level in composite material shaping process, stainless (steel) wire is respectively welded
Wire；It is after cement composite material hardening that six end faces of whole cuboid and stainless (steel) wire are all close with the junction of wire
Envelope；Cement composite material after hardening and humidity sensor are embedded in concrete, wire stretches out from concrete and is connected to
Impedance instrument, arranges humidity measurement instrument outside concrete；
Step 2, it is 5～20mV to apply sinusoid potential amplitude, and frequency range is 0.001Hz～1000kHz, and humidity measurement instrument works
Temperature is -40 DEG C～85 DEG C；
Step 3, by impedance instrument the Nyquist spectrograms of cement composite material are obtained, from the reality for scheming upper 1～30Hz scopes
Resistance of portion's impedance as cement composite material；
Step 4, sets up cement composite material electrical conductivity and the graph of a relation of chloride ion content under the conditions of relative humidity 0～90%, leads to
Cross real-time prison of the conductivity variations realization of monitoring cement composite material to Chloride Ion in Concrete content under different humidity state
Survey.
8. according to claim 7 based on Graphene/detection side of the cement composite material to Chloride Ion in Concrete content
In method, step 1, the cement composite material after hardening is sealed using epoxy resin.
9. according to claim 7 based on Graphene/detection side of the cement composite material to Chloride Ion in Concrete content
In method, step 1, the stainless (steel) wire gauge of wire is 10～1250 mesh, and the aperture of stainless (steel) wire is 800～2000 mesh.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611126800.3A CN106596650B (en) | 2016-12-08 | 2016-12-08 | It is a kind of based on graphene/cement composite material to the detection device and detection method of Chloride Ion in Concrete content |
| PCT/CN2017/107446 WO2018103463A1 (en) | 2016-12-08 | 2017-10-24 | Apparatus and method for detecting chloride ion content in concrete on the basis of graphene/cement composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611126800.3A CN106596650B (en) | 2016-12-08 | 2016-12-08 | It is a kind of based on graphene/cement composite material to the detection device and detection method of Chloride Ion in Concrete content |
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| Publication Number | Publication Date |
|---|---|
| CN106596650A true CN106596650A (en) | 2017-04-26 |
| CN106596650B CN106596650B (en) | 2019-03-12 |
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| CN201611126800.3A Active CN106596650B (en) | 2016-12-08 | 2016-12-08 | It is a kind of based on graphene/cement composite material to the detection device and detection method of Chloride Ion in Concrete content |
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| WO (1) | WO2018103463A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807148A (en) * | 2017-10-23 | 2018-03-16 | 河海大学 | Outsourcing AEM build-in type concrete chloride ion sensor and preparation and method of testing |
| CN107870184A (en) * | 2017-10-31 | 2018-04-03 | 长沙理工大学 | Device and method for monitoring concentration of chloride ions in concrete and manufacturing method of piezoelectric ceramic sensor |
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| WO2018103463A1 (en) | 2018-06-14 |
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