CN105842141A - Method for measuring infiltration rate of ions in concrete - Google Patents
Method for measuring infiltration rate of ions in concrete Download PDFInfo
- Publication number
- CN105842141A CN105842141A CN201610439408.8A CN201610439408A CN105842141A CN 105842141 A CN105842141 A CN 105842141A CN 201610439408 A CN201610439408 A CN 201610439408A CN 105842141 A CN105842141 A CN 105842141A
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- Prior art keywords
- metal bar
- concrete
- insulation material
- measuring method
- material layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Abstract
The invention discloses a method for measuring the infiltration rate of ions in concrete. An outer groove is arranged in the side surface of a to-be-measured sample; the outer groove is filled with an electrolyte solution; a multi-channel electrode consisting of a metal bar and an insulation material is arranged on the lower surface of the to-be-measured sample; the metal bar is connected with a corrosion testing instrument; the infiltration condition of the ions in the concrete is studied through measuring the potential distribution condition of the multi-channel electrode; the resistance, to the infiltration of the ions, of the concrete can be judged according to the testing time. By using a multi-channel electrode method to measure the infiltration rate of the ions, the method for measuring the infiltration rate of the ions in the concrete is simpler and more convenient, and is wide in scope of application; further, the usage of too many chemical reagents is not needed; special requirements on the physicochemical properties of hardened cement mortar and concrete are not needed.
Description
The present invention is the division of parent application " a kind of apparatus and method measuring concrete ion permeability and application thereof "
Application, the Application No. 2014107816311 of parent application, the filing date of parent application December in 2014 16 days.
Technical field
The present invention relates to detect apparatus field, be specifically related to hydrated cement paste and concrete intermediate ion permeability detection equipment
Field, more specifically, relates to a kind of apparatus and method measuring concrete ion permeability.
Background technology
Hardened cement paste and concrete are porous materials, and the chloride ion in the medium such as soil or sea water can penetrate into coagulation
In soil.Owing to chloride ion can destroy the passivating film of the reinforcing bar in high alkalinity environment, thus the chlorine in reinforced concrete structure from
The infiltration of son receives the concern of a lot of people.Measure the method for hydrated cement paste and Chloride Ion in Concrete diffusion at present mainly
Quickly chloride ion transport Y-factor method Y (RCM method) and electric flux method.
The operation of RCM method is complex, the concrete anti-chlorine that electric flux method is recommended according to American Society for Testing Materials (ASTM)
Ion permeability test method ASTM C1202 amendment forms, and this method also can be named unidirectional current mensuration (or coulomb electric charge method, electric conduction quantity
Method), be one of ion penetration resistance of concrete test method of being most widely used in the world at present, its be applicable to measure with
It is that index determines ion penetration resistance of concrete energy by the electric flux of concrete sample.But electric flux method is not suitable for mixing
There is the ion penetration resistance of concrete energy of the good conductive material such as nitrite and steel fibre.
Summary of the invention
The present invention is to solve that the problems such as complicated are measured in hardened cement mortar and concrete chloride ion infiltration, apply multichannel
Electrode method, it is provided that a kind of simple and convenient and the device of sample size can be adapted to, it is achieved to concrete ion permeability
Measurement.
In order to solve the problems referred to above, the present invention realizes by the following technical programs.
A kind of device measuring concrete ion permeability, the side surface at testing sample arranges water jacket, and in water jacket
Arranging electrolyte solution and reference electrode, the lower surface at testing sample arranges the manifold being made up of metal bar and insulation material layer
Road electrode, the length of described metal bar and the thickness of insulation material layer are equal, and described metal bar is embedded in insulation material layer also
Forming metal bar matrix, one end of described metal bar contacts with the lower surface of testing sample, the other end and insulation material layer
Lower surface is concordant；Described metal bar is connected with Corrosive Detection Instrument respectively with reference electrode.
In technique scheme, described testing sample selects concrete block or cement briquette.
In technique scheme, described reference electrode is saturated calomel electrode or copper/saturated copper sulphate electrode.
In technique scheme, described electrolyte solution is sodium-chloride water solution, and the mass percent of sodium chloride is
1%-15%.
In technique scheme, described insulation material layer selects novolac resin layer or epoxy resin layer.
In technique scheme, a diameter of 0.5mm-8mm of described metal bar, material is Q235 steel.
In technique scheme, described metal bar matrix is the matrix of m row × n row, and m can be equal to n, such as 5 row 20
Row or 10 row 10 arrange, and metal bar is set in qually spaced in insulation material layer, and 3 30mm are configured the most at equal intervals.
In technique scheme, described Corrosive Detection Instrument refers to the instrument with the detection metal erosion signal of telecommunication, example
As the instrument of voltage, electric current can be detected, such as the CST520 wire beam electrode corrosion tester of Wuhan Gastec Instrument Ltd..
In technique scheme, described Corrosive Detection Instrument is connected with computer, to be transmitted to test signal calculate
In machine and preserved or analyze.
The method utilizing said apparatus to measure concrete ion infiltration rate, is carried out as steps described below:
Step 1, adds electrolyte solution in water jacket and is placed in electrolyte solution by reference electrode, opening corrosion test
Instrument carries out signal of telecommunication scanning to multi-channel electrode and records electrical signal data, according to electrical signal data and the metal bar of record
Position carries out the drafting of signal of telecommunication scattergram；
Step 2, the position judgment being substantially layered by the signal of telecommunication in signal of telecommunication scattergram is the position that ion is diffused into, and remembers
Record the metal bar position corresponding to position that ion is diffused into, and ion is diffused into the time t needed for this position；
Step 3, spreads to ion according to the metal bar position calculation testing sample electrolyte solution interface of step 2 record
Horizontal range d between the position arrived；
Step 4, by formula v=d/t, calculates the ion infiltration rate for testing sample.
During infiltration is whole, Corrosive Detection Instrument carries out lasting signal of telecommunication scanning to multi-channel electrode, with voltage
As a example by signal, it becomes possible to obtain the voltage signal of different time, for whole testing sample, owing to metal bar selects m row × n row
Arranged in matrix, each metal bar can test the voltage signal of certain position on the testing sample that it is corresponding, when voltage is believed
When number changing, i.e. can determine whether to occur in the position of which metal bar change in electric, and this metal bar position is turned
It is changed to the horizontal range at metal bar distance test sample product electrolyte solution interface.
In step 1, scanning speed is 1-5 second/point, and Corrosive Detection Instrument carries out voltage or electric current to multi-channel electrode
The scanning of signal and record.
Technique scheme is the application in chloride permeability speed in measuring concrete sample, selects for coagulation soil sample
Product are tested, and selective chlorination sodium water solution is as electrolyte solution, the seepage velocity of test chloride ion.
When using, owing to water jacket is set directly at the side surface of testing sample, the direct contact side of electrolyte solution
Surface is also permeated, and utilizes Corrosive Detection Instrument to gather the signal of telecommunication of metal bar in multi-channel electrode, it is possible to judge and gold
Belong to the ion infiltration situation of a certain position in the corresponding testing sample in rod position.By measuring the Potential distribution feelings of multi-channel electrode
Condition research concrete intermediate ion infiltration situation, it is judged that the resistance of concrete to chloride ion penetration of concrete.Present invention application multi-channel electrode
It is relatively simple that method measures chloride permeability rate, applied widely, and need not use too much chemical reagent, for hardened cement
The physicochemical properties of mortar and concrete do not have particular/special requirement yet.Apparatus of the present invention are simple, easily operated, can save substantial amounts of
Time cost and work workload.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the Longitudinal cross section schematic of multi-channel electrode in the present invention；
Fig. 3 is the cross sectional representation of multi-channel electrode in the present invention；
Fig. 4 is to utilize technical scheme potential image of multi-channel electrode after permeating 5 days.
The reference of the present invention is:
1: testing sample 2: multi-channel electrode
3: reference electrode 4: electrolyte solution
5: water jacket 6: Corrosive Detection Instrument
7: computer 8: insulation material layer
9: metal bar
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below embodiment of the present invention is made further
Ground describes in detail.
Seeing accompanying drawing 1--3, a kind of device measuring concrete ion permeability, outside the side surface of testing sample is arranged
Groove, and electrolyte solution and reference electrode are set in water jacket, the lower surface at testing sample is arranged by metal bar and insulation material
The multi-channel electrode of bed of material composition, the length of described metal bar and the thickness of insulation material layer are equal, and described metal bar is embedded in
In insulation material layer and form metal bar matrix, one end of described metal bar contacts with the lower surface of testing sample, the other end
Concordant with the lower surface of insulation material layer；Described metal bar is connected with Corrosive Detection Instrument respectively with reference electrode；Described corrosion
Test instrunment is connected with computer, to be transmitted in computer by test signal and to be preserved or analyze.
In technique scheme, described testing sample selects concrete block or cement briquette.
In technique scheme, described reference electrode is saturated calomel electrode or copper/saturated copper sulphate electrode.
In technique scheme, described electrolyte solution is sodium-chloride water solution, and the mass percent of sodium chloride is
1%-15%.
In technique scheme, described insulation material layer selects novolac resin layer or epoxy resin layer.
In technique scheme, a diameter of 0.5mm-8mm of described metal bar.
In technique scheme, described metal bar matrix is the matrix of m row × n row, and m can be equal to n, such as 5 row 20
Row or 10 row 10 arrange, and metal bar is set in qually spaced in insulation material layer, and 3 30mm are configured the most at equal intervals.
In technique scheme, described Corrosive Detection Instrument refers to the instrument with the detection metal erosion signal of telecommunication, example
As the instrument of voltage, electric current can be detected.
Chloride permeability by concrete sample illustrates the operational version of the present invention as a example by detecting below.Use Wuhan Cohan
The CST520 wire beam electrode corrosion tester of special Instrument Ltd.；Electrolyte solution is sodium-chloride water solution, the matter of sodium chloride
Amount percent is 10%；Insulation material layer is novolac resin layer, metal bar (Q235 model) a diameter of 0.5mm, selects 10 row 10
The metal bar array of row is embedded in novolac resin layer and is arranged under concrete sample；Saturated calomel electricity is set in water jacket
Pole, as reference electrode, utilizes Corrosive Detection Instrument to be distributed the current potential (voltage) in multi-channel electrode and carries out after connecting circuit
Measure, and observe potential change situation, after testing 5 days, obtain potential image, shown in Figure 4, wherein transverse and longitudinal coordinate 1
The position of each metal bar in 10 the most corresponding 10 × 10 metal bar matrixes, it will be seen that it is special that some position distribution presents left low right high distribution
Point, it is known that the bar-shaped zone current potential of chloride ion diffusion process abscissa 1-2 from left to right is significantly lower than right side area, it is known that chlorine
Ion has mainly been diffused into the position of that string electrode that abscissa is 2.Abscissa be 2 electrode distance sample and sodium chloride molten
Distance d at liquid interface is 2.5cm, and testing time t now is 5d (5 days), then chloride ion infiltration speed in this concrete
Rate is 0.5cm/d.
Above the present invention is done exemplary description, it should explanation, in the situation of the core without departing from the present invention
Under, any simple deformation, amendment or other those skilled in the art can not spend the equivalent of creative work equal
Fall into protection scope of the present invention.
Claims (10)
1. the measuring method of concrete intermediate ion permeability, it is characterised in that utilize measurement apparatus to carry out as steps described below:
Step 1, adds electrolyte solution in water jacket and is placed in electrolyte solution by reference electrode, opening Corrosive Detection Instrument
Multi-channel electrode is carried out signal of telecommunication scanning and records electrical signal data, according to electrical signal data and the position of metal bar of record
Carry out the drafting of signal of telecommunication scattergram；
Step 2, the position judgment being substantially layered by the signal of telecommunication in signal of telecommunication scattergram is the position that ion is diffused into, and record from
Metal bar position corresponding to the position that son is diffused into, and ion is diffused into the time t needed for this position；
Step 3, is diffused into according to metal bar position calculation testing sample electrolyte solution interface to the ion of step 2 record
Horizontal range d between position；
Step 4, by formula v=d/t, calculates the ion infiltration rate for testing sample.
Described measurement apparatus, the side surface at testing sample arranges water jacket, and arranges electrolyte solution and reference electricity in water jacket
Pole, the lower surface at testing sample arranges the multi-channel electrode being made up of metal bar and insulation material layer, the length of described metal bar
The thickness of degree and insulation material layer is equal, and described metal bar is embedded in insulation material layer and is formed metal bar matrix, described gold
The one end belonging to rod contacts with the lower surface of testing sample, and the other end is concordant with the lower surface of insulation material layer；Described metal bar
It is connected with Corrosive Detection Instrument respectively with reference electrode.
The measuring method of concrete intermediate ion permeability the most according to claim 1, it is characterised in that in step 1, sweep
Retouching speed is 1-5 second/point, and Corrosive Detection Instrument carries out voltage or the scanning of current signal and record to multi-channel electrode.
3. according to the measuring method of the concrete intermediate ion permeability described in claim 1,2, it is characterised in that described corrosion is surveyed
Test instrument is connected with computer.
4. according to the measuring method of the concrete intermediate ion permeability described in claim 1,2, it is characterised in that described reference electricity
Extremely saturated calomel electrode or copper/saturated copper sulphate electrode.
5. according to the measuring method of the concrete intermediate ion permeability described in claim 1,2, it is characterised in that described insulation material
The bed of material selects novolac resin layer or epoxy resin layer.
6. according to the measuring method of the concrete intermediate ion permeability described in claim 1,2, it is characterised in that described metal bar
Matrix is the matrix of m row × n row, and metal bar is set in qually spaced in insulation material layer.
The measuring method of concrete intermediate ion permeability the most according to claim 6, it is characterised in that described metal bar square
Battle array is that 5 row 20 arrange or 10 row 10 arrange, and metal bar 3 30mm at equal intervals are arranged in insulation material layer.
8. according to the measuring method of the concrete intermediate ion permeability described in claim 1,2, it is characterised in that described metal bar
A diameter of 0.5mm-8mm, material is Q235 steel.
The method of measurement concrete ion infiltration rate the most according to claim 1 is chloride ion in measuring concrete sample
Application in seepage velocity.
Application the most according to claim 9, it is characterised in that selective chlorination sodium water solution is as electrolyte solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610439408.8A CN105842141A (en) | 2014-12-16 | 2014-12-16 | Method for measuring infiltration rate of ions in concrete |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610439408.8A CN105842141A (en) | 2014-12-16 | 2014-12-16 | Method for measuring infiltration rate of ions in concrete |
| CN201410781631.1A CN104458536A (en) | 2014-12-16 | 2014-12-16 | Device and method for measuring ion permeability of concrete, as well as application of device and method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410781631.1A Division CN104458536A (en) | 2014-12-16 | 2014-12-16 | Device and method for measuring ion permeability of concrete, as well as application of device and method |
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| CN105842141A true CN105842141A (en) | 2016-08-10 |
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| CN201610439408.8A Pending CN105842141A (en) | 2014-12-16 | 2014-12-16 | Method for measuring infiltration rate of ions in concrete |
| CN201410781631.1A Pending CN104458536A (en) | 2014-12-16 | 2014-12-16 | Device and method for measuring ion permeability of concrete, as well as application of device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307705A (en) * | 2018-12-11 | 2020-06-19 | 马自达汽车株式会社 | Corrosion resistance test method for clad metal material |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466829B (en) * | 2015-11-17 | 2018-06-22 | 厦门理工学院 | A kind of method for monitoring Chloride Ion in Concrete infiltration forward position |
| CN113984592A (en) * | 2021-11-04 | 2022-01-28 | 安徽江淮汽车集团股份有限公司 | Wax liquid penetration detection device |
| CN113916750B (en) * | 2021-11-23 | 2022-07-01 | 南通市建筑科学研究院有限公司 | Multifunctional impermeability tester and concrete comprehensive impermeability test system comprising same |
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Application publication date: 20160810 |