CN105784781A - Reinforcing steel bar and concrete bonding damage test method - Google Patents
Reinforcing steel bar and concrete bonding damage test method Download PDFInfo
- Publication number
- CN105784781A CN105784781A CN201610145020.7A CN201610145020A CN105784781A CN 105784781 A CN105784781 A CN 105784781A CN 201610145020 A CN201610145020 A CN 201610145020A CN 105784781 A CN105784781 A CN 105784781A
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- China
- Prior art keywords
- concrete
- silicone grease
- reinforcing bar
- electrode
- conductive silicone
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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
Abstract
The invention discloses a reinforcing steel bar and concrete bonding damage test method which comprises the following steps: I, performing moisture saturation treatment on a concrete component to be tested; II, rubbing annular conducting silicone grease on the outer side of the concrete component to be tested; III, testing the overall damage state; IV, testing the partial damage state. As the annular conducting silicone grease is rubbed on the outer side of the concrete component to be tested, the annular conducting silicone grease is connected as a whole to form an electrode, a reinforcing steel bar can be taken as another electrode for alternative-current impedance spectroscopy tests, bonding overall damage analysis can be performed on reinforcing steel bar-concrete interface bonding damage by using an equivalent circuit, each piece of annular conducting silicone grease can be taken as one electrode, each reinforcing steel bar can be taken as another electrode for alternative-current impedance spectroscopy tests, and partial analysis on the reinforcing steel bar-concrete interface bonding damage can be performed by using the equivalent circuit. The reinforcing steel bar and concrete bonding damage test method is convenient to operate and very good in flexibility, a concrete component damage test method can be improved, and the efficiency and the precision can be improved.
Description
Technical field
The present invention relates to a kind of concrete component life test technical field, particularly relate to a kind of reinforcing bar and concrete binding
Damage measure method.
Background technology
Armored concrete, as a kind of construction material, is most widely used in engineering construction.Reinforcing bar can with concrete
By bonding, it is the premise that normally worked of reinforced concrete structure, in the Crack Control of reinforced concrete structure and avoid
The aspects such as slippage of reinforced bar play an important role.Bond state between reinforcing bar and concrete is always in reinforced concrete structure standby
Concerned emphasis.Associated mechanisms and numerous scholar have carried out numerous studies to reinforcing bar with concrete interface damage both at home and abroad,
But great majority are the damage principle explaining bonding interface and the impact on component holistic resistant behavior thereof.By literature search, mesh
Front many based on acoustic emission to the test of damages of concrete structures, this technology belongs to observational measurement, not yet finds that reinforcing bar is with mixed
The quantitative measuring method of solidifying soil bonding damage.
Summary of the invention
The technical problem to be solved is 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, enters for interface damage degree
Row identifies and judges, steel-concrete cross section bonding degree of injury can be carried out quantitative test, can general study bonding damage
Degree, it is possible to research local bonding degree of injury, has the biggest flexibility, it is simple to operation.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of reinforcing bar damages with concrete binding
Method of testing, comprises the steps:
The first step: concrete component to be tested satisfy water process；
Second step: smear annular conductive silicone grease outside 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: overall faulted condition tolerance, as an electrode after being connected by whole wall scroll annular conductive silicone grease, will be located in treating
The reinforcing bar surveyed in concrete component carries out ac impedance spectroscopy test as another one 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 the overall faulted condition tolerance that bonds；
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 the local damage state measurement that bonds.
The 1-2 of the thickness of concrete cover that spacing is concrete component to be measured between described adjacent annular conduction silicone grease
Times, the coating thickness of annular conductive silicone grease is 50 microns-500 microns.
Described equivalent circuit includes representing conduction silicone grease and the interface resistance R1 of concrete and interface capacitance C1, and electrode
Between concrete resistance R2 and electric capacity C2, and the interface resistance R3 of reinforcing bar and concrete and interface capacitance C3, by R1 Yu C1 also
Connecting after connection, R2 with C2 parallel connection and R3 with C3 parallel connection, described C3 is installed in series normal phase angle original paper CPE.
Use and have the beneficial effects that produced by technique scheme: by ring-type at concrete component outer application to be measured
Conduction silicone grease, becomes annular conductive silicone grease integrated connection an electrode, and as another one electrode, reinforcing bar is carried out exchange resistance
Anti-spectrum test, can damage the overall breakdown diagnosis that bond by means of equivalent circuit, respectively will steel-concrete interfacial adhesion
Reinforcing bar, as an electrode, is carried out ac impedance spectroscopy test as another one electrode by each annular conductive silicone grease, by means of
Equivalent circuit can carry out partial analysis to the damage of steel-concrete interfacial adhesion, can form quantitative test during analyzing,
And this method is convenient to operate, there is extremely strong flexibility, improve concrete component damage measure method, improve efficiency and essence
Degree.
Accompanying drawing explanation
Fig. 1 be the present invention conduct electricity silicone grease coating schematic diagram；
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: 1, concrete component to be measured；2, reinforcing bar；3, conduction silicone grease；4, conduction silicone grease-concrete interface electric double layer；
5, steel-concrete interfacial electric double layer.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but the present invention is all right
Using other to be different from alternate manner described here to implement, 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 not limited by following public specific embodiment.
As it is shown in figure 1, the invention discloses a kind of reinforcing bar and concrete binding damage measure method, coating conduction silicone grease
Concrete section conductive structure, mixes including reinforced concrete interface electric double layer, concrete capacitive reactance and impedance and conduction silicone grease
Solidifying Soil Interface electric double layer (seeing accompanying drawing 2), carries out the equivalent-circuit model (seeing accompanying drawing 3) of AC impedance analysis of spectrum by three parts
Composition, by the left-to-right conduction silicone grease of correspondence respectively and the interface resistance R1 of concrete, concrete between interface capacitance C1, and electrode
Resistance R2, electric capacity C2, and reinforcing bar and the interface resistance R3 of concrete, interface capacitance C3, have employed three kinds of components: electricity
Resistance, normal phase angle unit and electric capacity.
Embodiment one: first, before structure bearing load, uses saturated limewater to satisfy concrete component to be measured
Water so that it is be in water-saturated state.Dry concrete surface, coat certain thickness annular conductive silicon on surface at spacing intervals
Fat, and the lead-in wire of each annular conductive silicone grease is connected together as an electrode；Hole at rebar surface, expose reinforcing bar, by steel
Muscle, as another electrode, accesses precise impedance analyzer and it is carried out ac impedance spectroscopy test, and by equivalent electric shown in Fig. 3
Road model obtains the data of impedance constituent C3 of reinforced concrete interface.After structure bearing load, still use saturated stone
Buck carries out full water to concrete component so that it is be in water-saturated state.Dry concrete surface, certain thick in same position coating
The annular conductive silicone grease of degree, and the lead-in wire of each annular conductive silicone grease bar is connected together as an electrode, using reinforcing bar as separately
One electrode accesses precise impedance analyzer and it is carried out ac impedance spectroscopy test, and is obtained by equivalent-circuit model shown in Fig. 3
Data to impedance constituent C3 of reinforced concrete interface.By the absolute difference Δ C3 of C3 before and after stand under load and by load
Before C3 data contrast, with reference to table 1 to reinforcing bar and concrete binding interface because of the damage that totally bonds caused by load
It is identified and judges.
Embodiment two: first, before structure bearing load, uses saturated limewater that concrete component carries out full water, makes
It is in water-saturated state.Dry concrete surface, coat certain thickness annular conductive silicone grease on surface at spacing intervals, will
Each annular conductive silicone grease is respectively as an electrode；Hole at rebar surface, expose reinforcing bar, reinforcing bar is connect as another electrode
Enter precise impedance analyzer and it is carried out ac impedance spectroscopy test, and it is mixed to obtain reinforcing bar by equivalent-circuit model shown in Fig. 3
The data of impedance constituent C3 of solidifying Soil Interface.After structure bearing load, still use saturated limewater that concrete component is entered
The full water of row so that it is be in water-saturated state.Dry concrete surface, coat certain thickness annular conductive silicone grease in same position,
Using each annular conductive silicone grease as an electrode, reinforcing bar is accessed precise impedance analyzer as another electrode it is entered
Row ac impedance spectroscopy is tested, and is obtained the impedance constituent of reinforced concrete interface by equivalent-circuit model shown in Fig. 3
The data of C3.The absolute difference Δ C3 of C3 before and after stand under load is contrasted with by the C3 data before load, with reference to table 1 to reinforcing bar
It is identified with concrete binding interface because of the local bonding damage caused by load and judges.
| Faulted condition | Negligible damage | Slight damage | Moderate lesion | Severe injury | Major injury |
In a word, the present invention is by concrete component outer application annular conductive silicone grease to be measured, by whole for annular conductive silicone grease
Body connects into an electrode, and it is bothersome that as another one electrode reinforcing bar carried out ac impedance spectroscopy, can by means of equivalent circuit
Bond overall breakdown diagnosis to the damage of steel-concrete interfacial adhesion, respectively using each annular conductive silicone grease as one
Electrode, carries out ac impedance spectroscopy test using reinforcing bar as another one electrode, can be to steel-concrete circle by means of equivalent circuit
Face bonding damage carries out partial analysis, can form quantitative test, and this method is convenient to operate, has pole during analyzing
Strong flexibility, improves concrete component damage measure method, improves efficiency and precision.
Claims (3)
1. a reinforcing bar and concrete binding damage measure method, it is characterised in that: comprise the steps:
The first step: concrete component to be tested satisfy water process；
Second step: smear annular conductive silicone grease outside 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: overall faulted condition tolerance, as an electrode after being connected by whole wall scroll annular conductive silicone grease, will be located in treating
The reinforcing bar surveyed in concrete component carries out ac impedance spectroscopy test as another one 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 the overall faulted condition tolerance that bonds；
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 the local damage state measurement that bonds.
Reinforcing bar the most according to claim 1 and concrete binding damage measure method, be characterised by: described adjacent annular is led
1-2 times of the thickness of concrete cover that spacing is concrete component to be measured between electricity silicone grease, the coating of annular conductive silicone grease
Thickness is 50 microns-500 microns.
Reinforcing bar the most according to claim 2 and concrete binding damage measure method, it is characterised in that: described equivalent circuit
Including representing interface resistance R1 and interface capacitance C1 of annular conductive silicone grease and concrete, and interelectrode concrete resistance R2
With electric capacity C2, and the interface resistance R3 of reinforcing bar and concrete and interface capacitance C3, R1 with C1 is in parallel, R2 with C2 is in parallel and
Connecting after R3 with C3 parallel connection, described C3 is installed in series normal phase angle original paper CPE.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105784781A true CN105784781A (en) | 2016-07-20 |
| CN105784781B CN105784781B (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946356A (en) * | 2019-04-19 | 2019-06-28 | 大连海事大学 | A kind of high temperature, Concrete after Fire damage quantitative evaluation method |
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 |
|---|
| SANGDO HONG: "sensors to monitor CFRP/Concrete bond in beams using electrochemical impedance spectroscopy", 《CIVIL ENGINEERING》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946356A (en) * | 2019-04-19 | 2019-06-28 | 大连海事大学 | A kind of high temperature, Concrete after Fire damage quantitative evaluation method |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105784781B (en) | 2018-05-29 |
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