CN105784781B - Reinforcing bar and concrete binding damage measure method - Google Patents
Reinforcing bar and concrete binding damage measure method Download PDFInfo
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- CN105784781B CN105784781B CN201610145020.7A CN201610145020A CN105784781B CN 105784781 B CN105784781 B CN 105784781B CN 201610145020 A CN201610145020 A CN 201610145020A CN 105784781 B CN105784781 B CN 105784781B
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- concrete
- silicone grease
- reinforcing bar
- conductive silicone
- annular conductive
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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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of reinforcing bars and concrete binding damage measure method, include the following steps：The first step：Concrete component to be tested is satisfied water process；Second step：Annular conductive silicone grease is smeared on the outside of concrete component to be measured；3rd step：Whole faulted condition measurement；4th step：Local damage state measurement.The present invention passes through in concrete component outer application annular conductive silicone grease to be measured, annular conductive silicone grease is connected into an electrode, and carry out ac impedance spectroscopy test using reinforcing bar as another electrode, damage can be bonded to reinforced concrete interface by means of equivalent circuit to carry out bonding whole breakdown diagnosis, respectively using each annular conductive silicone grease as an electrode, ac impedance spectroscopy test is carried out using reinforcing bar as another electrode, damage can be bonded to reinforced concrete interface carry out partial analysis by means of equivalent circuit, this method is easy to operation, with extremely strong flexibility, improve concrete component damage measure method, improve efficiency and precision.
Description
Technical field
The present invention relates to a kind of concrete component life test technical field more particularly to a kind of reinforcing bars and concrete binding
Damage measure method.
Background technology
Armored concrete is most widely used as a kind of construction material in engineering construction.Reinforcing bar and concrete can
The premise that reinforced concrete structure is able to work normally by bonding, reinforced concrete structure Crack Control and avoid
Slippage of reinforced bar etc. plays an important role.Bond state between reinforcing bar and concrete is always standby in reinforced concrete structure
Concerned emphasis.Domestic and international associated mechanisms and numerous scholars have carried out numerous studies to reinforcing bar and concrete interface damage,
But most of is the damage principle for explaining bonding interface and its influence to component holistic resistant behavior.Pass through literature search, mesh
Mostly based on acoustic emission, which belongs to observational measurement for the preceding test to damages of concrete structures, not yet finds reinforcing bar with mixing
Solidifying soil bonds the quantitative measuring method of damage.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of reinforcing bar and concrete binding damage measure method, by right
Concrete component to be measured carries out ac impedance spectroscopy test, the parameter in analyzing equivalent circuit model, for interface damage degree into
Row identification and judgement can bond degree of injury to steel-concrete section and carry out quantitative test, you can the overall bonding damage of research
Degree can also study local bonding degree of injury, have very big flexibility, easy to operation.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of reinforcing bar is damaged with concrete binding
Test method includes the following steps：
The first step：Concrete component to be tested is satisfied water process；
Second step：Annular conductive silicone grease is smeared on the outside of concrete component to be measured, annular conductive silicone grease is along coagulation to be measured
Reinforcing bar length direction in native component is evenly arranged at least two, and every annular conductive silicone grease is the closing formed around reinforcing bar
Annular；
3rd step：Whole faulted condition measurement, as an electrode after whole wall scroll annular conductive silicone grease are connected, by position
Reinforcing bar in concrete component to be measured carries out ac impedance spectroscopy test as another electrode, by means of Analysis of Equivalent Circuit
The capacitive reactance composition transfer rate at the steel-concrete interface of concrete component to be measured carries out bonding whole faulted condition measurement；
4th step：Using wall scroll annular conductive silicone grease as an electrode, using the reinforcing bar in concrete component to be measured as another
One electrode carries out ac impedance spectroscopy test, utilizes the steel-concrete interface of Analysis of Equivalent Circuit concrete component to be measured
Capacitive reactance composition transfer rate carries out bonding local damage state measurement.
Spacing between the adjacent annular conduction silicone grease is the 1-2 of the thickness of concrete cover of concrete component to be measured
Times, the coating thickness of annular conductive silicone grease is 50 microns -500 microns.
The equivalent circuit includes the interface resistance R1 and interface capacitance C1 and electrode that represent conductive silicone grease and concrete
Between concrete resistance R2 and capacitance C2 and reinforcing bar and the interface resistance R3 of concrete and interface capacitance C3, by R1 and C1 simultaneously
Connection, R2 and C2 are in parallel and R3 after C3 parallel connections with connecting, and the C3 is installed in series normal phase angle original paper CPE.
It is using advantageous effect caused by above-mentioned technical proposal：By annular in concrete component outer application to be measured
Annular conductive silicone grease is connected into an electrode, and using reinforcing bar as another electrode and carries out exchange resistance by conductive silicone grease
Anti- spectrum test can damage steel-concrete interfacial adhesion by means of equivalent circuit and carry out bonding whole breakdown diagnosis, respectively will
Each annular conductive silicone grease carries out ac impedance spectroscopy test as an electrode using reinforcing bar as another electrode, by means of
Equivalent circuit can damage steel-concrete interfacial adhesion and carry out partial analysis, can form quantitative test in the analysis process,
And this method is easy to operation, has extremely strong flexibility, improves concrete component damage measure method, improves efficiency and essence
Degree.
Description of the drawings
Fig. 1 is conductive silicone grease coating schematic diagram of the invention；
Fig. 2 is concrete member steel bar to be measured-concrete interface conduction state schematic diagram；
Fig. 3 is schematic equivalent circuit；
In the accompanying drawings：1st, concrete component to be measured；2nd, reinforcing bar；3rd, conductive silicone grease；4th, the double electricity of conductive silicone grease-concrete interface
Layer；5th, steel-concrete interfacial electric double layer.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
Implemented using other different from other manner described here, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is from the limitation of following public specific embodiment.
As shown in Figure 1, the invention discloses a kind of reinforcing bars and concrete binding damage measure method, conductive silicone grease is coated
Concrete section conductive structure, including reinforcing bar-concrete interface electric double layer, concrete capacitive reactance and impedance and conductive silicone grease-mixed
Solidifying Soil Interface electric double layer（Referring to attached drawing 2）, the equivalent-circuit model of progress AC impedance spectrum analysis（Referring to attached drawing 3）By three parts
Composition, by concrete between interface resistance R1, the interface capacitance C1 and electrode of left-to-right conductive silicone grease corresponding respectively and concrete
Resistance R2, capacitance C2 and reinforcing bar and concrete interface resistance R3, interface capacitance C3, employ three kinds of circuit elements：Electricity
Resistance, normal phase angle unit and capacitance.
Embodiment one：First, before structure bearing load, satisfied using saturated limewater to concrete component to be measured
Water is at water-saturated state.Concrete surface is dried, coats certain thickness annular conductive silicon at spacing intervals on surface
Fat, and the lead of each annular conductive silicone grease is connected together as an electrode；It drills in rebar surface, exposes reinforcing bar, by steel
For muscle as another electrode, access precise impedance analyzer carries out ac impedance spectroscopy test to it, and passes through equivalent electricity shown in Fig. 3
Road model obtains the data of the impedance constituent C3 of reinforcing bar-concrete interface.After structure bearing load, still using saturation stone
Buck carries out concrete component in full water, is at water-saturated state.Concrete surface is dried, is coated in same position certain thick
The annular conductive silicone grease of degree, and the lead of each annular conductive silicone grease item is connected together as an electrode, using reinforcing bar as another
One electrode access precise impedance analyzer carries out ac impedance spectroscopy test to it, and passes through equivalent-circuit model shown in Fig. 3 and obtain
To the data of the impedance constituent C3 of reinforcing bar-concrete interface.By the absolute difference Δ C3 of C3 before and after stand under load and by load
Preceding C3 data are compared, and reinforcing bar and concrete binding interface are damaged because totally being bonded caused by by load with reference to table 1
It is identified and judges.
Embodiment two：First, before structure bearing load, full water is carried out to concrete component using saturated limewater, is made
It is in water-saturated state.Concrete surface is dried, coats certain thickness annular conductive silicone grease at spacing intervals on surface, it will
Each annular conductive silicone grease is respectively as an electrode；It drills in rebar surface, exposes reinforcing bar, connect reinforcing bar as another electrode
Enter precise impedance analyzer and ac impedance spectroscopy test is carried out to it, and pass through equivalent-circuit model shown in Fig. 3 and obtain reinforcing bar-mixed
The data of the impedance constituent C3 of solidifying Soil Interface.After structure bearing load, still using saturated limewater to concrete component into
The full water of row, is at water-saturated state.Concrete surface is dried, certain thickness annular conductive silicone grease is coated in same position,
Using each annular conductive silicone grease as an electrode, using reinforcing bar as another electrode access precise impedance analyzer to its into
Row ac impedance spectroscopy is tested, and is passed through equivalent-circuit model shown in Fig. 3 and obtained the impedance constituent of reinforcing bar-concrete interface
The data of C3.The absolute difference Δ C3 of C3 before and after stand under load and the C3 data before by load are compared, with reference to table 1 to reinforcing bar
With concrete binding interface because caused by by load local bonding damage be identified and judge.
| Faulted condition | Negligible damage | Slight damage | Moderate lesion | Severe injury | Major injury |
In short, the present invention is by concrete component outer application annular conductive silicone grease to be measured, annular conductive silicone grease is whole
Body connects into an electrode, and reinforcing bar is bothersome as another electrode progress ac impedance spectroscopy, can by means of equivalent circuit
The damage of steel-concrete interfacial adhesion is carried out to bond whole breakdown diagnosis, respectively using each annular conductive silicone grease as one
Reinforcing bar is carried out ac impedance spectroscopy test by electrode, can be to steel-concrete circle by means of equivalent circuit
Face bonds damage and carries out partial analysis, can form quantitative test in the analysis process, and this method is easy to operation, has pole
Strong flexibility improves concrete component damage measure method, improves efficiency and precision.
Claims (2)
1. a kind of reinforcing bar and concrete binding damage measure method, it is characterised in that：Include the following steps：
The first step：Concrete component to be tested is satisfied water process；
Second step：Annular conductive silicone grease is smeared on the outside of concrete component to be measured, annular conductive silicone grease is along concrete structure to be measured
Reinforcing bar length direction in part is evenly arranged at least two, and every annular conductive silicone grease is the closed-loop formed around reinforcing bar
Shape；
3rd step：Whole faulted condition measurement as an electrode after whole wall scroll annular conductive silicone grease are connected, will be located at and treat
The reinforcing bar surveyed in concrete component carries out ac impedance spectroscopy test as another electrode, to be measured by means of Analysis of Equivalent Circuit
The capacitive reactance composition transfer rate at the steel-concrete interface of concrete component carries out bonding whole faulted condition measurement；
4th step：Using wall scroll annular conductive silicone grease as an electrode, using the reinforcing bar in concrete component to be measured as another
Electrode carries out ac impedance spectroscopy test, utilizes the capacitive reactance at the steel-concrete interface of Analysis of Equivalent Circuit concrete component to be measured
Composition transfer rate carries out bonding local damage state measurement；
The equivalent circuit includes the interface resistance R1 and interface capacitance C1 and electrode that represent annular conductive silicone grease and concrete
Between concrete resistance R2 and capacitance C2 and reinforcing bar and the interface resistance R3 of concrete and interface capacitance C3, by R1 and C1 simultaneously
Connection, R2 and C2 are in parallel and R3 after C3 parallel connections with connecting, and the C3 is installed in series normal phase angle original paper CPE.
2. reinforcing bar according to claim 1 and concrete binding damage measure method, are characterized in that：The adjacent annular is led
Spacing between electric silicone grease is 1-2 times of the thickness of concrete cover of concrete component to be measured, the coating of annular conductive silicone grease
Thickness is 50 microns -500 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145020.7A CN105784781B (en) | 2016-03-10 | 2016-03-10 | Reinforcing bar and concrete binding damage measure method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145020.7A CN105784781B (en) | 2016-03-10 | 2016-03-10 | Reinforcing bar and concrete binding damage measure method |
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| Publication Number | Publication Date |
|---|---|
| CN105784781A CN105784781A (en) | 2016-07-20 |
| CN105784781B true CN105784781B (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610145020.7A Expired - Fee Related CN105784781B (en) | 2016-03-10 | 2016-03-10 | Reinforcing bar and concrete binding damage measure method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946356B (en) * | 2019-04-19 | 2021-01-05 | 大连海事大学 | Quantitative evaluation method for concrete damage after high temperature and fire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937598A (en) * | 1973-11-02 | 1976-02-10 | Danfoss A/S | Encased refrigerating machine |
| CN103575769A (en) * | 2013-11-13 | 2014-02-12 | 济南大学 | Piezoelectric sensor for steel-bar corrosion monitoring and steel-bar corrosion monitoring method |
| CN103995023A (en) * | 2014-04-25 | 2014-08-20 | 湖南大学 | Detection method for defect of interfacial debonding between tube wall of concrete filled steel tube member and concrete |
-
2016
- 2016-03-10 CN CN201610145020.7A patent/CN105784781B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937598A (en) * | 1973-11-02 | 1976-02-10 | Danfoss A/S | Encased refrigerating machine |
| CN103575769A (en) * | 2013-11-13 | 2014-02-12 | 济南大学 | Piezoelectric sensor for steel-bar corrosion monitoring and steel-bar corrosion monitoring method |
| CN103995023A (en) * | 2014-04-25 | 2014-08-20 | 湖南大学 | Detection method for defect of interfacial debonding between tube wall of concrete filled steel tube member and concrete |
Non-Patent Citations (1)
| Title |
|---|
| sensors to monitor CFRP/Concrete bond in beams using electrochemical impedance spectroscopy;Sangdo Hong;《Civil Engineering》;20051231;第1-35页 * |
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| CN105784781A (en) | 2016-07-20 |
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