CN104198350B - Concrete model block streaming potential measuring device and practice method - Google Patents
Concrete model block streaming potential measuring device and practice method Download PDFInfo
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- CN104198350B CN104198350B CN201410330740.1A CN201410330740A CN104198350B CN 104198350 B CN104198350 B CN 104198350B CN 201410330740 A CN201410330740 A CN 201410330740A CN 104198350 B CN104198350 B CN 104198350B
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Abstract
The invention discloses a concrete model block streaming potential measuring device and a practice method. The concrete permeability can be indirectly evaluated by streaming potential, and the concrete model block streaming potential measuring device and the practice method belong to the technical field of researches on concrete permeability. Two poles of a measuring electrode are installed on organic glass tubes with different lengths, a strong rubber sleeve tightly hoops a concrete model block, both ends of the strong rubber sleeve are respectively connected with electrode installation ends of the organic glass tubes, a latex tube with a wooden clip sleeves the non-electrode end of a short organic glass tube for closely connecting the non-electrode end of a long organic glass tube of the combination with a water outlet end of a water outlet elbow of a glass container. A NaCl solution is injected from a liquid inlet hole, the wooden clip on the latex tube is adjusted to allow the NaCl solution to drip out in a uniform speed. The electrode voltage, namely the streaming potential is measured by a precision multimeter, the streaming potential coefficient is shown as the ratio of the measured voltage and pressure on both ends of the model block, and can indirectly reflect the quality of the model block permeability. The concrete model block streaming potential measuring device is applicable to the researches on the concrete permeability, low in cost, and broad in application prospects.
Description
Technical field
The present invention relates to a kind of device and the practice that concrete model block electrokinetic phenomena is measured under constant-pressure, by flowing
Potential can indirectly evaluate concrete permeability, belong to concrete permeability studying technological domain.
Background technology
In general the different thing phase of any two (solid-liquid two-phase) contact all can in two alternate generation potentials, this be by
What separation of charge caused.This centrifugation be embodied in solid can selectively adsorb from electrolyte certain ion or by
Ionization is produced in molecular solids itself to make it in electrolyte.Two-phase respectively has the electric charge of surplus, and electricity is equal, sign
Conversely, attracting each other, electric double layer is formed.Concrete is a kind of pore media, can be formed in the microchannel of concrete model block
Above-mentioned electric double layer, i.e. adsorption layer and diffusion layer.Under pressure difference effect, fluid flows in the microchannel of concrete model block
When, the net surplus positive charge in diffusion layer can be carried to the low one end movement of pressure in microchannel, make this proper charge accumulation；
The high one end of pressure, with the reduction of diffusion layer cation, surface anion is dominant, and this one end has just remained negative electrical charge only.In
It is to form electrical potential difference at microchannel two ends, referred to as electrokinetic phenomena can measure such electrical potential difference with high-precision universal meter.Survey
The ratio of electrical potential difference and concrete model block top surface liquid pressure be referred to as electrokinetic phenomena coefficient, the size of the coefficient can with
Connect the infiltrative quality of measurement concrete model block.
The traditional measurement method of concrete permeability has, permeable method, air permeability method, Cl-Ion osmosis and current flow method；These
Conventional method has that test period is longer, experimentation cost.
Concrete electrokinetic phenomena measurement apparatus proposed by the present invention, using electrochemical principle concrete electrokinetic phenomena is measured,
The electrokinetic phenomena for measuring can be used to evaluate the permeability of concrete Jing after being converted into electrokinetic phenomena coefficient, with important theory meaning
Justice and economic worth.
The content of the invention
Present invention aim at using electrochemical principle, a kind of measurement apparatus of concrete model block electrokinetic phenomena are designed,
Its general principle is：Calculate electrokinetic phenomena coefficient to evaluate the permeability of concrete with the electrokinetic phenomena for measuring.
The technical solution used in the present invention is as follows：
A kind of concrete model block electrokinetic phenomena measurement apparatus, including with valvular inlet 1, with valvular spilling
Mouthfuls 2, the glass container 3 with water exit elbow, lucite tube 4, NaCl solution 5, measuring electrode 6, concrete model block 7, strong
Power rubber sleeve 8, lucite tube 9, emulsion tube 10, support 11, beaker 12, beaker 13 and wooden clip 14 are constituted；Beaker 12 and
Glass container 3 with water exit elbow is placed on support 11；The glass with water exit elbow is placed in valvular inlet 1 to hold
The upper end of device 3；The wire of measuring electrode 6 is drawn respectively from the lower end of lucite tube 4 and the upper end of lucite tube 9, lucite
Through the duct gap sealant sealing of measuring electrode wire on pipe；Strength rubber sleeve 8 is enclosed within concrete model block 7；By force
The upper end of power rubber sleeve 8 is connected with the lower end of the lucite tube 4 of the negative pole equipped with measuring electrode 6, the lower end of strength rubber sleeve 8
It is connected with the upper end of the lucite tube 9 for being cased with emulsion tube 10；It is lucite tube 4, measuring electrode 6, concrete model block 7, strong
Power rubber sleeve 8 and be cased with emulsion tube 10 lucite tube 9 composition assembly with water exit elbow glass container 3 elbow
Delivery port is closely coupled；Open with valvular inlet 1, NaCl solution 5 is injected in glass container 3, keep carrying valve
Overfall 2 have NaCl solution 5 slowly to ooze, in falling into beaker 12；The NaCl being cased with the lucite tube 9 of emulsion tube 10 is molten
After liquid 5 is full of, the wooden clip 14 on emulsion tube 10 is adjusted, liquid is slowly dropped in beaker 13, and keep emulsion tube 10
Middle liquid volume is constant；The voltage at the two ends of measuring electrode 6 is measured with High Precision Multimeter；The measurement liquid level of glass container 3 is to coagulation
The discrepancy in elevation of the top surface of soil model block 7 calculates liquid pressure, does ratio with the voltage and liquid pressure of universal meter and obtains final product electrokinetic phenomena system
Number；So, with valvular inlet 1, with valvular overfall 2, the glass container 3, lucite with water exit elbow
Pipe 4, NaCl solution 5, measuring electrode 6, concrete model block 7, strength rubber sleeve 8, lucite tube 9, with valve emulsion tube
10th, support 11, beaker 12, beaker 13 and wooden clip 14 constitute a kind of concrete model block electrokinetic phenomena measurement apparatus.
It is described to be input into by the valvular lucite tube of band (diameter 1.5cm) and NaCl solution with valvular inlet 1
Conduit is connected and constitutes；
It is described that glass container 3 is arranged on by the valvular lucite tube of band (diameter 1.5cm) with valvular overfall 2
Circular hole (away from the top edge 5cm of glass container 3) on and seal composition.During test, it should have NaCl solution to drip all the time, that is, keep
Liquid level in glass container 3 is constant；
The volume of the glass container 3 be 5L, water exit elbow away from the bottom surface of glass container 3 be 5cm, external diameter be 2cm, in container
The height of NaCl liquid levels to the top surface of concrete model block 7 is 200-250cm；
The lucite tube 4 (high 180cm) and lucite tube 9 (high 3cm), the two external diameter, internal diameter, wall thickness are homogeneous
Together, size is respectively 2.5cm, 2cm, 2.5mm.In the one end of lucite tube 4 and the one end of lucite tube 9, along lucite tube
Generatrix direction bores 1.2mm circular holes in the midpoint of wall thickness one, and the high 1cm in hole used as the lead channels of measuring electrode 6, pacify by measuring electrode 6
Need to use sealant sealing after dress；
The measuring electrode 6 is made using Ag/AgCl materials and is non-close contact relation with concrete model block 7.
The cylinder diameter of concrete model block 7 is 2.5cm, high 2cm.
The molar concentration of the NaCl solution is 0.05-0.1mol/l.
The high-precision universal meter accuracy is not lower than 6 half.
Electrokinetic phenomena measurement apparatus and way in concrete model block under the constant-pressure, its production order is as follows：
A) support 11 is placed in smooth vibrationless plane；
B) glass container 3 is put in adjustment and the position of beaker 12 stablizes support 11 on support 11；
C) strength rubber sleeve 8 is enclosed within concrete model block 7；
D) one electrode of measuring electrode 6 is installed in the lower end of lucite tube 4；
E) one electrode of measuring electrode 6 is arranged on the upper end of lucite tube 9, emulsion tube 10 is enclosed within into lucite
The lower end of pipe 9 is simultaneously clipped in the lower end of emulsion tube 10 with wooden clip 14；
F) one end of the strength rubber sleeve 8 of concrete model block 7 and the lucite for installing the pole of measuring electrode 6 one be will be equipped with
The electrode installation end of pipe 4 closely connects, and to avoid one end of measuring electrode 6 from producing friction with the upper surface of concrete model block 7；
G) other end that will be equipped with the strength rubber sleeve 8 of concrete model block 7 is organic with another pole of installation measuring electrode 6
The electrode installation end of glass tube 9 closely connects, and notes avoiding another pole of measuring electrode 6 with the following table of concrete model block 7
Face produces friction；
H) by lucite tube 4, measuring electrode 6, concrete model block 7, strength rubber sleeve 8 and it is cased with having for emulsion tube 10
The upper end of the assembly of the composition of machine glass tube 9 is closely coupled with the grass tube water exit elbow lower end of glass container 3；
I) beaker 13 is placed on into the lower section of emulsion tube 10；
J) the injection NaCl solution 5 in glass container 3 will be opened with the valve of valvular inlet 1, and will keep carrying valve
Overfall 2 slowly have liquid to drip, when hydraulically full in the tube chamber of emulsion tube 10, it is that liquid delays to adjust wooden clip 14
Slowly, uniformly ooze, and keep hydraulically full in latex tube chamber；
K) High Precision Multimeter measuring electrode both end voltage is used, calculates the liquid pressure of concrete model block top surface, electricity consumption
Pressure does ratio and obtains final product electrokinetic phenomena coefficient with pressure.
With the infiltrative measuring method of conventional concrete, it is an advantage of the invention that：
(1) by Electrochemistry Knowledge for concrete permeability evaluation；
(2) permeability of concrete model block is reflected using electrokinetic phenomena coefficient；
(3) device makes simple, low cost, obvious economic.
A kind of concrete model block electrokinetic phenomena measurement apparatus figures of Fig. 1；
In figure：1- is with valvular inlet；2- is with valvular overfall；Glass containers of the 3- with water exit elbow；
4- lucite tubes；5-NaCl solution；6- measuring electrodes；7- concrete model blocks；8- strength rubber sleeves；9- lucite tubes；
10- emulsion tubes；11- supports；12- beakers；13- beakers；The wooden clips of 14-.
Specific embodiment：
A kind of concrete model block electrokinetic phenomena measurement apparatus, including with valvular inlet 1, with valvular spilling
Mouthfuls 2, the glass container 3 with water exit elbow, lucite tube 4, NaCl solution 5, measuring electrode 6, concrete model block 7, strong
Power rubber sleeve 8, lucite tube 9, emulsion tube 10, support 11, beaker 12, beaker 13 and wooden clip 14 are constituted；Beaker 13 and
Glass container 3 with water exit elbow is placed on support 11；The glass with water exit elbow is placed in valvular inlet 1 to hold
The upper end of device 3；The wire of measuring electrode 6 is drawn respectively from the lower end of lucite tube 4 and the upper end of lucite tube 9, lucite
Through the duct gap sealant sealing of measuring electrode wire on pipe；Strength rubber sleeve 8 is enclosed within concrete model block 7；By force
The upper end of power rubber sleeve 8 is connected with the lower end of the lucite tube 4 of the negative pole equipped with measuring electrode 6, the lower end of strength rubber sleeve 8
It is connected with the upper end of the lucite tube 9 for being cased with emulsion tube 10；It is lucite tube 4, measuring electrode 6, concrete model block 7, strong
Power rubber sleeve 8 and be cased with emulsion tube 10 lucite tube 9 composition assembly with water exit elbow glass container 3 elbow
Delivery port is closely coupled；Open with valvular inlet 1, NaCl solution 5 is injected in glass container 3, keep carrying valve
Overfall 2 have NaCl solution 5 slowly to ooze, in falling into beaker 12；The NaCl being cased with the lucite tube 9 of emulsion tube 10 is molten
After liquid 5 is full of, the wooden clip 14 on emulsion tube 10 is adjusted, liquid is slowly dropped in beaker 13, and keep emulsion tube 10
Middle liquid volume is constant；The voltage at the two ends of measuring electrode 6 is measured with High Precision Multimeter；The measurement liquid level of glass container 3 is to coagulation
The discrepancy in elevation of the top surface of soil model block 7 calculates liquid pressure, does ratio with the voltage and liquid pressure of universal meter and obtains final product electrokinetic phenomena system
Number；So, with valvular inlet 1, with valvular overfall 2, the glass container 3, lucite with water exit elbow
Pipe 4, NaCl solution 5, measuring electrode 6, concrete model block 7, strength rubber sleeve 8, lucite tube 9, with valve emulsion tube
10th, support 11, beaker 12, beaker 13 and wooden clip 14 constitute a kind of measurement apparatus of concrete model block electrokinetic phenomena.
A kind of concrete model block electrokinetic phenomena measurement apparatus and way, its production order is as follows：
A) support 11 is placed in smooth vibrationless plane；
B) glass container 3 is put in adjustment and the position of beaker 12 stablizes support 11 on support 11；
C) strength rubber sleeve 8 is enclosed within concrete model block 7；
D) one electrode of measuring electrode 6 is installed in the lower end of lucite tube 4；
E) one electrode of measuring electrode 6 is arranged on the upper end of lucite tube 9, emulsion tube 10 is enclosed within into lucite
The lower end of pipe 9 is simultaneously clipped in the lower end of emulsion tube 10 with wooden clip 14；
F) one end of the strength rubber sleeve 8 of concrete model block 7 and the lucite for installing the pole of measuring electrode 6 one be will be equipped with
The electrode installation end of pipe 4 closely connects, and to avoid one end of measuring electrode 6 from producing friction with the upper surface of concrete model block 7；
G) other end that will be equipped with the strength rubber sleeve 8 of concrete model block 7 is organic with another pole of installation measuring electrode 6
The electrode installation end of glass tube 9 closely connects, and notes avoiding another pole of measuring electrode 6 with the following table of concrete model block 7
Face produces friction；
H) by lucite tube 4, measuring electrode 6, concrete model block 7, strength rubber sleeve 8 and it is cased with having for emulsion tube 10
The upper end of the assembly of the composition of machine glass tube 9 is closely coupled with the grass tube water exit elbow lower end of glass container 3；
I) beaker 13 is placed on into the lower section of emulsion tube 10；
J) the injection NaCl solution 5 in glass container 3 will be opened with the valve of valvular inlet 1, and will keep carrying valve
Overfall 2 slowly have liquid to drip, when hydraulically full in the tube chamber of emulsion tube 10, it is that liquid delays to adjust wooden clip 14
Slowly, uniformly ooze, and keep hydraulically full in latex tube chamber；
K) High Precision Multimeter measuring electrode both end voltage is used, calculates the liquid pressure of concrete model block top surface, electricity consumption
Pressure does ratio and obtains final product electrokinetic phenomena coefficient with pressure.
Be more than the present invention an exemplary embodiments, the present invention enforcement not limited to this.
Claims (8)
1. a kind of concrete model block electrokinetic phenomena measurement apparatus, including with valvular inlet (1), with valvular spilling
Mouth (2), the glass container (3) with water exit elbow, lucite tube A (4), NaCl solution (5), measuring electrode (6), concrete
Model block (7), strength rubber sleeve (8), lucite tube B (9), emulsion tube (10), support (11), beaker A (12), beaker B
And wooden clip (14) (13)；Beaker A (12) and the glass container (3) with water exit elbow are placed on support (11)；With valve
The inlet (1) of door is placed in glass container (3) upper end with water exit elbow；The wire of measuring electrode (6) is respectively from organic glass
The lower end of glass pipe A (4) and lucite tube B (9) upper end are drawn, through the duct gap of measuring electrode wire on lucite tube
Use sealant sealing；Strength rubber sleeve (8) is enclosed within concrete model block (7)；The upper end of strength rubber sleeve (8) measures with being equipped with
The lower end of the lucite tube A (4) of the negative pole of electrode (6) is connected, the lower end of strength rubber sleeve (8) be cased with emulsion tube (10)
The upper end of lucite tube B (9) is connected；Lucite tube A (4), measuring electrode (6), concrete model block (7), strength rubber
Cover (8) and be cased with the assembly and the glass container (3) with water exit elbow of lucite tube B (9) compositions of emulsion tube (10)
Elbow delivery port it is closely coupled；Open with valvular inlet (1), injection NaCl solution (5) in glass container (3),
The valvular overfall of retainer belt (2) has NaCl solution (5) slowly to ooze, in falling into beaker A (12)；It is cased with emulsion tube (10)
After NaCl solution (5) in lucite tube B (9) is full of, the wooden clip (14) on emulsion tube (10) is adjusted, make liquid slow
In being dropped in beaker B (13), and keep liquid volume in emulsion tube (10) constant；Using the high accuracy ten thousand of not lower than 6 half
The voltage at measuring electrode (6) two ends is measured with table；The discrepancy in elevation of measurement glass container (3) liquid level to concrete model block (7) top surface
Liquid pressure is calculated, ratio is done with the voltage and liquid pressure of universal meter and is obtained final product electrokinetic phenomena coefficient；So, with it is valvular enter
Liquid mouth (1), with valvular overfall (2), the glass container (3) with water exit elbow, lucite tube A (4), NaCl solution
(5), measuring electrode (6), concrete model block (7), strength rubber sleeve (8), lucite tube B (9), with valvular emulsion tube
(10), support (11), beaker A (12), beaker B (13) and wooden clip (14) constitute a kind of concrete model block electrokinetic phenomena
Measurement apparatus.
2. according to a kind of concrete model block electrokinetic phenomena measurement apparatus described in claim 1, it is characterised in that：
It is described to be input into NaCl solution by the lucite tube of the valvular a diameter of 1.5cm of band with valvular inlet (1)
Conduit is connected.
3. according to a kind of concrete model block electrokinetic phenomena measurement apparatus described in claim 1, it is characterised in that：It is described with valve
Overfall (2) by the valvular a diameter of 1.5cm of band lucite tube be arranged on glass container (3) circular hole on and seal
Constitute, the circular hole during test, it should have NaCl solution to drip all the time, that is, keeps glass to hold away from glass container (3) top edge 5cm
Liquid level in device (3) is constant.
4. according to a kind of concrete model block electrokinetic phenomena measurement apparatus described in claim 1, it is characterised in that：
Glass container (3) volume be 5L, water exit elbow away from glass container (3) bottom surface be 5cm, external diameter be 2cm, in container
The height of NaCl liquid levels to concrete model block (7) top surface is 200-250cm.
5. according to a kind of concrete model block electrokinetic phenomena measurement apparatus described in claim 1, it is characterised in that：
The high 180cm of the lucite tube A (4), the high 3cm of lucite tube B (9), the two external diameter, internal diameter, wall thickness all same, chi
It is very little to be respectively 2.5cm, 2cm, 0.5cm, in lucite tube A (4) lower ends and lucite tube B (9) upper end, along external diameter bus side
1.2mm circular holes are bored in wall thickness, used as the lead channels of measuring electrode (6), measuring electrode (6) needs with close the high 10mm in hole after installing
Sealing is sealed.
6. according to a kind of concrete model block electrokinetic phenomena measurement apparatus described in claim 1, it is characterised in that：The measuring electrode
(6) made using Ag/AgCl materials and with concrete model block (7) be non-close contact relation.
7. according to a kind of concrete model block electrokinetic phenomena measurement apparatus described in claim 1, it is characterised in that：
Concrete model block (7) cylinder diameter is 2.5cm, high 2cm；The molar concentration of NaCl solution is 0.05-
0.1mol/L；High Precision Multimeter is not lower than 6 half.
8. it is a kind of to measure concrete electrokinetic phenomena using concrete model block electrokinetic phenomena measurement apparatus as claimed in claim 1
Method, its production order is as follows using step：
A) support (11) is placed in smooth vibrationless plane；
B) adjustment is put glass container (3) and beaker A (12) position and makes support (11) stably on support (11)；
C) strength rubber sleeve (8) is enclosed within concrete model block (7)；
One electrode of measuring electrode (6) d) is installed in the lower end of lucite tube A (4)；
One electrode of measuring electrode (6) e) is arranged on the upper end of lucite tube B (9), emulsion tube (10) is enclosed within organic
The lower end of glass tube B (9) is simultaneously clipped in the lower end of emulsion tube (10) with wooden clip (14)；
F) one end of the strength rubber sleeve (8) of concrete model block (7) and the organic glass for installing the pole of measuring electrode (6) be will be equipped with
The electrode installation end of glass pipe A (4) closely connects, and to avoid one end of measuring electrode (6) and the upper surface of concrete model block (7)
Produce friction；
G) will be equipped with the other end of strength rubber sleeve (8) and the having for installation measuring electrode (6) another pole of concrete model block (7)
The electrode installation end of machine glass tube B (9) closely connects, and notes avoiding another pole of measuring electrode (6) and concrete model block
(7) lower surface produces friction；
H) by lucite tube A (4), measuring electrode (6), concrete model block (7), strength rubber sleeve (8) and it is cased with emulsion tube
(10) upper end of the assembly of lucite tube B (9) compositions is tight with the grass tube water exit elbow lower end of glass container (3)
It is connected；
I) beaker B (13) is placed on into emulsion tube (10) lower section；
J) injection NaCl solution (5) in glass container (3) will be opened with valvular inlet (1) valve, and will keep carrying valve
The overfall (2) of door slowly has liquid to drip, and when hydraulically full in the tube chamber of emulsion tube (10), adjusting wooden clip (14) makes
Liquid slowly, is uniformly oozed, and keeps hydraulically full in latex tube chamber；
K) using High Precision Multimeter measuring electrode (6) both end voltage of not lower than 6 half, concrete model block top surface is calculated
Liquid pressure, do ratio with voltage and pressure and obtain final product electrokinetic phenomena coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410330740.1A CN104198350B (en) | 2014-07-08 | 2014-07-08 | Concrete model block streaming potential measuring device and practice method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410330740.1A CN104198350B (en) | 2014-07-08 | 2014-07-08 | Concrete model block streaming potential measuring device and practice method |
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| CN104198350A CN104198350A (en) | 2014-12-10 |
| CN104198350B true CN104198350B (en) | 2017-05-10 |
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| CN201410330740.1A Expired - Fee Related CN104198350B (en) | 2014-07-08 | 2014-07-08 | Concrete model block streaming potential measuring device and practice method |
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| CN112730570B (en) * | 2021-01-06 | 2021-10-26 | 西南大学 | Measuring device and measuring method for flow potential coefficient and zeta potential |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5460994A (en) * | 1977-10-24 | 1979-05-16 | Agency Of Ind Science & Technol | Measuring method of gas permeability of porous substances |
| CN201852769U (en) * | 2010-11-23 | 2011-06-01 | 北京师范大学 | Device for measuring permeability coefficient of peaty soil |
| CN202024952U (en) * | 2011-03-29 | 2011-11-02 | 黑龙江八一农垦大学 | Concrete permeability test clamp holder |
| JP5893530B2 (en) * | 2012-08-03 | 2016-03-23 | 一般財団法人電力中央研究所 | Concrete air permeability test apparatus, method for estimating air permeability coefficient distribution of concrete, estimation apparatus, and estimation program |
| CN103293086B (en) * | 2013-05-31 | 2015-07-15 | 中国石油集团西部钻探工程有限公司 | Semipermeable partition plate core saturation specific resistance measuring device |
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