CN108680469A - A kind of ion penetration resistance of concrete measurement method - Google Patents
A kind of ion penetration resistance of concrete measurement method Download PDFInfo
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- CN108680469A CN108680469A CN201810399322.6A CN201810399322A CN108680469A CN 108680469 A CN108680469 A CN 108680469A CN 201810399322 A CN201810399322 A CN 201810399322A CN 108680469 A CN108680469 A CN 108680469A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
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Abstract
The invention discloses a kind of ion penetration resistance of concrete measurement methods, include the following steps：Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, the KOH solution of the 0.2mol/L of about 300mL is injected in rubber tube, anode plate and surface of test piece is set to be immersed in solution, the KOH solution of the 0.2mol/L containing 5%NaCl is injected in test flume, until being flushed with the liquid level of KOH solution in rubber tube, open power supply, record time Simultaneous Determination shunt voltage immediately, series current and electrolyte initial temperature (being accurate to 0.2 DEG C), energization finishes taking-up test specimen, it is split into two halves, utilize the diffusion depth of the silver nitrate titration chlorion of 0.1mol/L, finally the chloride diffusion coefficient of concrete is calculated by formula.The present invention can reflect that chlorion actual conditions are defeated and move past journey, moreover it is possible to carry out, not influenced by concrete electric conductivity under isoperibol, be solved the problems, such as not accurate enough reliable using electric flux method testing result.
Description
Technical field
The present invention relates to technical field of concrete, specially a kind of ion penetration resistance of concrete measurement method.
Background technology
China marine site is vast, and large-scale capital construction focuses mostly in coastal area.Coastal building is due to by serious
Chloride Attack, steel bar corrosion phenomenon is very serious, is one of the main reason for durability damage destroys.In recent years, industry pair
The mechanism destroyed in Chloride Attack, model prediction, the research of testing inspection, handle etc. obtained it is more into
Exhibition.Detecting appraisal means and objective basis of the chloride ion permeability test method as durability leading indicator, thus determine visitor
Seeing accurate and practicality test method is particularly important.Ion penetration resistance of concrete is that the important durability of concrete is bad
Change one of index, objective and accurate and practical test method is particularly important.
Existing chloride ion permeability test method generally uses electric flux method, although electric flux method is simple and efficient,
Existing defect is more.First, stringency of test is poor, particularly with the concrete of resisting chlorides poor diffusivity, by institute
Making alive is bigger than normal, and the temperature of solution and test specimen increases, and concrete is caused test result to be distorted by deterioration.Secondly, concrete electric
Resistance rate is not only related to pore structure, and related to the ionic strength in hole solution, and ionic strength is unrelated with pore structure；Thus try
Test reaction is the motion result of overall ion, rather than only chlorion moves, and it is not accurate enough reliable to eventually lead to testing result,
For this purpose, it is proposed that a kind of ion penetration resistance of concrete measurement method.
Invention content
The purpose of the present invention is to provide a kind of ion penetration resistance of concrete measurement methods, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the present invention provides the following technical solutions：A kind of ion penetration resistance of concrete measurement side
Method includes the following steps：Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, in rubber
The KOH solution that the 0.2mol/L of about 300mL is injected in packing element makes anode plate and surface of test piece be immersed in solution, is testing
The KOH solution of the 0.2mol/L containing 5%NaCl is injected in slot, until being flushed with the liquid level of KOH solution in rubber tube, opens electricity
Source, record time Simultaneous Determination shunt voltage, series current and electrolyte initial temperature (being accurate to 0.2 DEG C) immediately, has been powered
Finish and take out test specimen, two halves is split into, using the diffusion depth of the silver nitrate titration chlorion of 0.1mol/L, finally to concrete
Chloride diffusion coefficient be calculated by formula, wherein formula is
Preferably, the test specimen standard size is diameter (100 ± 1) mm, and height (50 ± 2) mm, test specimen is from laboratory's system
Coring in work or practical concrete structure, and cut into standard size.
Preferably, the DRCM, 0Indicate the Chloride Diffusion Coefficient in Concrete that RCM methods measure, unit m2/s；T indicates sun
Pole electrolyte is initial and the average value of final temperature, unit K.
Preferably, the h indicates height of specimen, unit m, xdIndicate chloride diffusion depth, unit m.
Preferably, the t indicates the energizing test time, and unit s, α are auxiliary variable,
Compared with prior art, the beneficial effects of the invention are as follows：The present invention uses chloride fast transferring method, can reflect
Chlorion actual conditions are defeated to move past journey, moreover it is possible to and it carries out, is not influenced by concrete electric conductivity under isoperibol, and existing electricity
Flux method cannot not only reflect that chlorion actual conditions are defeated and move past journey, cannot be carried out under isoperibol, by concrete conduction
The influence of performance, by using chloride fast transferring method, accuracy in detection is high, with a high credibility, solves using electric flux method
The not accurate enough reliable problem of testing result.
Specific implementation mode
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
The every other embodiment that art personnel are obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of technical solution：A kind of ion penetration resistance of concrete measurement method, includes the following steps：
Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, about 300mL is injected in rubber tube
0.2mol/L KOH solution, so that anode plate and surface of test piece is immersed in solution, in test flume injection contain 5%NaCl
The KOH solution of 0.2mol/L open power supply until flushed with the liquid level of KOH solution in rubber tube, the record time synchronizes immediately
Shunt voltage, series current and electrolyte initial temperature (being accurate to 0.2 DEG C) are measured, energization finishes taking-up test specimen, is split into
Two halves finally press the chloride diffusion coefficient of concrete using the diffusion depth of the silver nitrate titration chlorion of 0.1mol/L
Formula calculates, and wherein formula is
Embodiment one：
Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, is noted in rubber tube
The KOH solution for entering the 0.2mol/L of about 300mL makes anode plate and surface of test piece be immersed in solution, is injected in test flume
The KOH solution of 0.2mol/L containing 5%NaCl opens power supply until flushed with the liquid level of KOH solution in rubber tube, when record
Between Simultaneous Determination shunt voltage, series current and electrolyte initial temperature (being accurate to 0.2 DEG C) immediately, energization finishes taking-up examination
Part is split into two halves, using the diffusion depth of the silver nitrate titration chlorion of 0.1mol/L, finally to the chlorion of concrete
Diffusion coefficient is calculated by formula, and wherein formula is
Embodiment two：
In embodiment one, following the description is added：
Test specimen standard size is diameter (100 ± 1) mm, and height (50 ± 2) mm, test specimen is made from laboratory or practical coagulation
Coring in soil structure, and cut into standard size.
Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, test specimen standard size
For diameter (100 ± 1) mm, height (50 ± 2) mm, test specimen from laboratory make or practical concrete structure in coring, and cut
At standard size, the KOH solution of the 0.2mol/L of about 300mL is injected in rubber tube, and anode plate and surface of test piece is made to submerge
In solution, the KOH solution of the 0.2mol/L containing 5%NaCl is injected in test flume, until the liquid with KOH solution in rubber tube
Face flushes, and opens power supply, the record time, Simultaneous Determination shunt voltage, series current and electrolyte initial temperature (were accurate to immediately
0.2 DEG C), energization finishes taking-up test specimen, is split into two halves, and the diffusion using the silver nitrate titration chlorion of 0.1mol/L is deep
Degree, is finally calculated by formula the chloride diffusion coefficient of concrete, wherein formula is
Embodiment three：
In embodiment two, following the description is added：
DRCM, 0Indicate the Chloride Diffusion Coefficient in Concrete that RCM methods measure, unit m2/s；At the beginning of T indicates anolyte
The average value to begin with final temperature, unit K.
Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, test specimen standard size
For diameter (100 ± 1) mm, height (50 ± 2) mm, test specimen from laboratory make or practical concrete structure in coring, and cut
At standard size, the KOH solution of the 0.2mol/L of about 300mL is injected in rubber tube, and anode plate and surface of test piece is made to submerge
In solution, the KOH solution of the 0.2mol/L containing 5%NaCl is injected in test flume, until the liquid with KOH solution in rubber tube
Face flushes, and opens power supply, the record time, Simultaneous Determination shunt voltage, series current and electrolyte initial temperature (were accurate to immediately
0.2 DEG C), energization finishes taking-up test specimen, is split into two halves, and the diffusion using the silver nitrate titration chlorion of 0.1mol/L is deep
Degree, is finally calculated by formula the chloride diffusion coefficient of concrete, wherein formula is
Wherein DRCM, 0Indicate the Chloride Diffusion Coefficient in Concrete that RCM methods measure, unit m2/s；At the beginning of T indicates anolyte
The average value to begin with final temperature, unit K.
Example IV：
In embodiment three, following the description is added：
H indicates height of specimen, unit m, xdIndicate chloride diffusion depth, unit m；T indicates the energizing test time,
Unit is s, and α is auxiliary variable,
Test specimen is impregnated into 4d in standard curing pond first, then test specimen is put into rubber tube, test specimen standard size
For diameter (100 ± 1) mm, height (50 ± 2) mm, test specimen from laboratory make or practical concrete structure in coring, and cut
At standard size, the KOH solution of the 0.2mol/L of about 300mL is injected in rubber tube, and anode plate and surface of test piece is made to submerge
In solution, the KOH solution of the 0.2mol/L containing 5%NaCl is injected in test flume, until the liquid with KOH solution in rubber tube
Face flushes, and opens power supply, the record time, Simultaneous Determination shunt voltage, series current and electrolyte initial temperature (were accurate to immediately
0.2 DEG C), energization finishes taking-up test specimen, is split into two halves, and the diffusion using the silver nitrate titration chlorion of 0.1mol/L is deep
Degree, is finally calculated by formula the chloride diffusion coefficient of concrete, wherein formula is
Wherein DRCM, 0Indicate the Chloride Diffusion Coefficient in Concrete that RCM methods measure, unit m2/s；At the beginning of T indicates anolyte
Begin and the average value of final temperature, unit K, wherein h indicate height of specimen, unit m, xdIndicate chloride diffusion depth,
Unit is m；T indicates the energizing test time, and unit s, α are auxiliary variable,
The present invention uses chloride fast transferring method, can reflect that chlorion actual conditions are defeated and move past journey, moreover it is possible in constant temperature
It carries out, is not influenced by concrete electric conductivity under environment, and existing electric flux method cannot not only reflect the practical feelings of chlorion
Condition is defeated to move past journey, cannot carry out under isoperibol, be influenced by concrete electric conductivity, by using chloride fast transferring
Method, accuracy in detection is high, with a high credibility, solves the problems, such as not accurate enough reliable using electric flux method testing result.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of ion penetration resistance of concrete measurement method, it is characterised in that：Include the following steps：Test specimen is being marked first
Quasi- maintenance impregnates 4d in pond, and then test specimen is put into rubber tube, injects the 0.2mol/L's of about 300mL in rubber tube
KOH solution makes anode plate and surface of test piece be immersed in solution, injects the 0.2mol/L's containing 5%NaCl in test flume
KOH solution opens power supply, the record time, Simultaneous Determination was in parallel electric immediately until being flushed with the liquid level of KOH solution in rubber tube
Pressure, series current and electrolyte initial temperature (being accurate to 0.2 DEG C), energization finish taking-up test specimen, are split into two halves, utilize
The diffusion depth of the silver nitrate titration chlorion of 0.1mol/L, is finally calculated by formula i.e. the chloride diffusion coefficient of concrete
Can, wherein formula is
2. a kind of ion penetration resistance of concrete measurement method according to claim 1, it is characterised in that：The test specimen
Standard size is diameter (100 ± 1) mm, highly (50 ± 2) mm, and test specimen takes from laboratory's making or practical concrete structure
Core, and cut into standard size.
3. a kind of ion penetration resistance of concrete measurement method according to claim 1, it is characterised in that：The DRCM, 0
Indicate the Chloride Diffusion Coefficient in Concrete that RCM methods measure, unit m2/s；T indicates that anolyte is initial and final temperature
Average value, unit K.
4. a kind of ion penetration resistance of concrete measurement method according to claim 1, it is characterised in that：The h tables
Show height of specimen, unit m, xdIndicate chloride diffusion depth, unit m.
5. a kind of ion penetration resistance of concrete measurement method according to claim 1, it is characterised in that：The t tables
Showing the energizing test time, unit s, α are auxiliary variable,
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| CN201810399322.6A CN108680469A (en) | 2018-04-28 | 2018-04-28 | A kind of ion penetration resistance of concrete measurement method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632601A (en) * | 2018-12-27 | 2019-04-16 | 贵州中建建筑科研设计院有限公司 | A kind of method of small core sample method detection ion penetration resistance of concrete energy |
| CN111077055A (en) * | 2019-12-25 | 2020-04-28 | 四川中核艾瑞特工程检测有限公司 | Chloride ion penetration depth measuring method |
| CN111896428A (en) * | 2020-08-10 | 2020-11-06 | 南京工业大学 | Device and method for measuring diffusion coefficient of sulfate ions in mortar and concrete |
| CN114264589A (en) * | 2021-12-29 | 2022-04-01 | 山东交通学院 | Concrete chloride ion permeability resistance detection device and method for field environment |
| CN117740665A (en) * | 2024-02-21 | 2024-03-22 | 中冶建筑研究总院（深圳）有限公司 | Method, system and device for evaluating chloride corrosion durability of concrete structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632601A (en) * | 2018-12-27 | 2019-04-16 | 贵州中建建筑科研设计院有限公司 | A kind of method of small core sample method detection ion penetration resistance of concrete energy |
| CN111077055A (en) * | 2019-12-25 | 2020-04-28 | 四川中核艾瑞特工程检测有限公司 | Chloride ion penetration depth measuring method |
| CN111896428A (en) * | 2020-08-10 | 2020-11-06 | 南京工业大学 | Device and method for measuring diffusion coefficient of sulfate ions in mortar and concrete |
| CN114264589A (en) * | 2021-12-29 | 2022-04-01 | 山东交通学院 | Concrete chloride ion permeability resistance detection device and method for field environment |
| CN114264589B (en) * | 2021-12-29 | 2023-07-04 | 山东交通学院 | Concrete chloride ion permeability resistance detection device and method for field environment |
| CN117740665A (en) * | 2024-02-21 | 2024-03-22 | 中冶建筑研究总院（深圳）有限公司 | Method, system and device for evaluating chloride corrosion durability of concrete structure |
| CN117740665B (en) * | 2024-02-21 | 2024-06-04 | 中冶建筑研究总院（深圳）有限公司 | Method, system and device for evaluating chloride corrosion durability of concrete structure |
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