CN102980839A - Device and method for determination of permeability coefficient of chloride ions in concrete - Google Patents
Device and method for determination of permeability coefficient of chloride ions in concrete Download PDFInfo
- Publication number
- CN102980839A CN102980839A CN201210467992XA CN201210467992A CN102980839A CN 102980839 A CN102980839 A CN 102980839A CN 201210467992X A CN201210467992X A CN 201210467992XA CN 201210467992 A CN201210467992 A CN 201210467992A CN 102980839 A CN102980839 A CN 102980839A
- Authority
- CN
- China
- Prior art keywords
- test
- pressing plate
- concrete
- dish spring
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention belongs to a technology for detecting concrete structure durability and relates to a device and a method for determination of a permeability coefficient of chloride ions in concrete. The method can realize a fast test of a diffusion coefficient of chloride ions in concrete under the action of continuous drawing and pressing loads. The device comprises a loading device and a test device. Through two screws and three pressing plates, the loading device applies a counter-force produced by a compressed spring to three test pieces thereby providing continuous and stable pressure or pull. Under the continuous and stable pressure or pull, the whole device is put into a specific rigid plastic case and an unstable-state electromigration test is carried out so that a diffusion coefficient of chloride ions is measured. The device can apply two types of loads, can test three test piece by an one step, and can realize fast determination of a diffusion coefficient of chloride ions under the action of drawing and pressing loads.
Description
Technical field
The invention belongs to the concrete structure durability detection technique, relate in particular to a kind of continue to draw, the method for rapidly testing of Chloride Diffusion Coefficient in Concrete under the press loading effect.
Background technology
The chlorion invasion causes reinforcement corrosion, and reinforced concrete structure durability can be deteriorated.A large amount of engineering practices show that the reinforcement corrosion under the chloride environments such as ocean, deicer salts is the first cause that causes xoncrete structure to destroy too early, and reinforcement corrosion has caused huge economic loss.Ion penetration resistance of concrete can become one of important indicator of estimating concrete structure durability.People have carried out years of researches to the method for testing of chloride permeability performance, have formulated relevant test procedure.Four kinds of method of testings, natural diffusion method, direct current measurement method, full salt concrete electrical conductivity method (NEL method) and unstable state migration tests method (RCM method) have been recommended by China's " durability design and construction guide ".But these method of testings all can not load the test test specimen, can't simulate the effect that existing structure bears the load of compression, bending, and the almost bar none bearing load effect of actual xoncrete structure.Be subject under the load action, certain variation all can occur in the inner microfracture of xoncrete structure, hole etc., and is perhaps closed, perhaps expansion, or even produce new crackle.The Chloride Diffusion Coefficient in Concrete that records during without load action and the chloride diffusion coefficient of actual xoncrete structure have certain difference, are unfavorable for the durability evaluating of xoncrete structure.CN 101699267, CN 101718671 A and CN102042949A have provided the direct current measurement method and have measured concrete in apparatus and method crooked, that press and draw measurement concrete permeability under the load action in the patent announcement, but the direct current measurement method can only record electric flux, provide qualitatively result, can't record chloride diffusion coefficient.What bulletin CN 101482477A provided is the method that the stable state electromigration is measured Chloride Diffusion Coefficient in Concrete under the pulling force effect, although be to measure Chloride Diffusion Coefficient in Concrete with unstable state migration tests method among the bulletin CN 102564916A, its charger can only provide pressure.Pressure can be provided, can provide again Chloride Diffusion Coefficient in Concrete device for quick testing and the method for pulling force to yet there are no report.In addition, above charger can only apply a kind of load of form, and once can only test a test specimen, and testing efficiency is lower.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of chlorion osmotic coefficient investigating device and method in concrete.
Concrete technical scheme is:
A kind of chlorion is the osmotic coefficient investigating device and method in concrete, described device is comprised of charger and proving installation, and described charger comprises screw rod, the first pressing plate, the second pressing plate, the 3rd pressing plate, cushion block, the first nut, the first dish spring, the second dish spring, sleeve gasket, the second nut; Be fixedly connected with two described screw rods in the same side of described the first pressing plate, mobilizable the second nut, sleeve gasket, the second dish spring, the second pressing plate, the first dish spring, the 3rd pressing plate and the first nut of being serially connected with successively along the top of described two screw rods; Described proving installation comprises plastic box and is arranged on the tilt stand of described plastic box inside.
A kind of pressurization load method of using described chlorion osmotic coefficient investigating device in concrete,
A kind of tensile load method of using described chlorion osmotic coefficient investigating device in concrete,
Step a lays three test blocks successively between described the first pressing plate and the second pressing plate, and separates with cushion block between described three test blocks, all connects firmly with insulation encapsulated is gluing between described test block and described the first pressing plate, the second pressing plate, the cushion block;
Step b after the described a step finishes, progressively tightens the nut at middle part, measures the amount of tension of dish spring with vernier caliper, looks into dish spring stretching scale and obtains corresponding value of thrust.
A kind of electromigratory method of test of using described chlorion osmotic coefficient investigating device in concrete, step c, with the test block side seal, the upper surface in described three test blocks is bonded with rubber tube with insulating gel respectively with fluid sealant;
Steps d is put into test specimen on the tilt stand of described plastic box together with whole charger, put into positive source in rubber tube, places power cathode between tilt stand and test block; In rubber tube and plastic box, add respectively NaOH and sodium chloride solution, and energising, the DC voltage of employing 10 ~ 60V scope, range of current is at 0 ~ 360mA, and conduction time, scope was 6 ~ 96h;
Step e, with the test block unloading, the test block of riving is sprayed liquor argenti nitratis ophthalmicus at the section of riving immediately behind the completing steps d, measures the variable color degree of depth, brings following formula into and can obtain chloride diffusion coefficient:
Wherein, D is chloride diffusion coefficient (㎡/s), T be the initial and end temp of anodic dissolution mean value (℃), L is the thickness (mm) of test specimen, U is the test voltage (V) of switching on, t is conduction time (h), X
dBe the chloride permeability variable color degree of depth (mm).
Described fluid sealant is glass cement.
The concentration of described sodium hydroxide solution is 0.3mol/L, and the massfraction of described sodium chloride solution is 10%, and the concentration of described liquor argenti nitratis ophthalmicus is 0.l mol/L.
The present invention has following beneficial effect:
The invention provides a kind ofly can provide pressure, and Chloride Diffusion Coefficient in Concrete device for quick testing and the method for testing of pulling force can be provided again.Proving installation of the present invention comprises charger and proving installation, described charger can apply and draw, press the load of two kinds of forms, and once can test three test specimens, realized drawing, the Fast Measurement of chloride diffusion coefficient under the press loading effect, can be widely used in the fields such as building, water conservancy, traffic.
Description of drawings
Fig. 1 is the charger figure of chlorion osmotic coefficient investigating device in concrete;
Fig. 2 is chloride diffusion coefficient proving installation vertical view;
Fig. 3 is chloride diffusion coefficient proving installation outboard profile;
The number in the figure title: 1, base pressing plate, 2, middle part pressing plate, 3, top platen, 4, screw rod, 5, top cushion block, 6, top nut, 7, dish spring, 8, middle part dish spring, 9, sleeve gasket, 10, middle part nut, 11, test block, 12, cushion block, 13, charger, 14, hard plastic case, 15, tilt stand, 16, rubber tube, 17, power cathode, 18, positive source.
Embodiment
A kind of chlorion is the osmotic coefficient investigating device and method in concrete, described device is comprised of charger and proving installation, and described charger comprises screw rod, the first pressing plate, the second pressing plate, the 3rd pressing plate, cushion block, the first nut, the first dish spring, the second dish spring, sleeve gasket, the second nut; Described screw rod has two, and the same end of described two screw rods is fixed on described the first pressing plate, mobilizable the second nut, sleeve gasket, the second dish spring, the second pressing plate, the first dish spring, the 3rd pressing plate and the first nut of being serially connected with successively along the top of two screw rods; Described proving installation comprises plastic box and is arranged on the tilt stand of described plastic box inside.
Three test blocks 11 are put between base pressing plate 1 and the middle part pressing plate 2 successively, have stainless steel cushion block 12 to separate between the test block, all connect with insulation encapsulated is gluing between test block 11 and the first pressing plate 1, the second pressing plate 2, the cushion block 12.
During to test block 11 on-load pressure, it is middle that top cushion block 5 is placed on top platen 3, is put on the pressure testing machine, and test block 11 is loaded.Measure the decrement of dish spring 7 with vernier caliper, with the size of this controlled pressure value, when loading force arrives requirement of experiment, top nut 6 tightened get final product.
During loading tensile, the nut 10 at middle part is progressively tightened, can be obtained the size of pulling force according to the decrement of dish spring 8.
Use described determinator to test electromigratory method:
Before the migration tests, with test block 11 side seals, the upper surface in described three test blocks is bonded with rubber tube 16 with insulating gel respectively with fluid sealant.
Voltage is adjusted in test and show conduction time
| Initial current/mA under the 30V voltage | Voltage/V is adjusted in test | Conduction time/h |
| <5 | 60 | 96 |
| 5~10 | 60 | 48 |
| 10~15 | 60 | 24 |
| 15~20 | 50 | 24 |
| 20~30 | 40 | 24 |
| 30~40 | 35 | 24 |
| 40~60 | 30 | 24 |
| 60~90 | 25 | 24 |
| 90~120 | 20 | 24 |
| 120~180 | 15 | 24 |
| 180~360 | 10 | 24 |
| ≥360 | 10 | 6 |
After energising was finished, with test block 11 unloadings, the test block 11 of riving at the liquor argenti nitratis ophthalmicus of the section sprinkling 0.1mol/L that rives, was measured the variable color degree of depth immediately, brings following formula into and can obtain chloride diffusion coefficient.
Wherein, D is chloride diffusion coefficient (㎡/s), T be the initial and end temp of anodic dissolution mean value (℃), L is the thickness (mm) of test specimen, U is the test voltage (V) of switching on, t is conduction time (h), X
dBe the chloride permeability variable color degree of depth (mm).
Below be the partial data that utilizes this device to record:
(1) concrete raw material
The peaceful sheep P. II 42.5R portland cement of gold; I level flyash; S95 level breeze; Particle diameter is 5-25mm continuous grading rubble; II district medium sand, modulus of fineness are 2.44 river sand; Polycarboxylic acid series high efficiency water reducing agent, water-reducing rate is greater than 25%; The Nanjing drinking public water supply.
(2) concrete mix
Table 1. concrete mix/kg/m
3
(3) concrete loads
This experimental measurement be the concrete chloride diffusion coefficient in the 56 day length of time, its 56 days cubic compressive strengths are 53.4Mpa.Chloride diffusion coefficient test test block is of a size of 100mm * 100mm * 50mm.The design loading force is 0,20%, 40%, 60% and 80% of pressure, 20%, 40%, 60% and 75% of pulling force.
(4) test findings
Table 2. chloride diffusion coefficient test result
As shown in Table 2, when concrete was subject to less pressure-acting, concrete microfracture etc. were compacted, and chloride diffusion coefficient reduces, and when pressure continuation increase, microfracture begins to increase and expansion, and chloride diffusion coefficient increases.Do the time spent when the concrete under tension, along with the increase of acting force, chloride diffusion coefficient increases rapidly.
The explanation of above test result, the present invention can effectively measure and draw, Chloride Diffusion Coefficient in Concrete under the press loading effect.
Claims (6)
1. chlorion osmotic coefficient investigating device in concrete, it is characterized in that: described device is comprised of charger and proving installation, and described charger comprises screw rod (4), the first pressing plate (1), the second pressing plate (2), the 3rd pressing plate (3), cushion block (5), the first nut (6), the first dish spring (7), the second dish spring (8), sleeve gasket (9), the second nut (10); Be fixedly connected with two described screw rods (4) in the same side of described the first pressing plate (1), mobilizable the second nut (10), sleeve gasket (9), the second dish spring (8), the second pressing plate (2), the first dish spring (7), the 3rd pressing plate (3) and the first nut (6) of being serially connected with successively along the top of described two screw rods (4); Described proving installation comprises plastic box (14) and is arranged on the inner tilt stand (15) of described plastic box (14).
2. pressurization load method of using a kind of chlorion as claimed in claim 1 osmotic coefficient investigating device in concrete is characterized in that:
Step 1, between described the first pressing plate (1) and the second pressing plate (2), lay successively three test blocks (11), and between described three test blocks (11), separate with cushion block (12), all connect firmly with insulation encapsulated is gluing between described three test blocks (11) and described the first pressing plate (1), the second pressing plate (2), the cushion block (12);
Step 2, cushion block (5) is placed in centre position in described top platen (3), pressure testing machine is to whole charger with cushion block (5) on-load pressure progressively, measure the decrement of dish spring (7) with vernier caliper, table look-up according to dish spring (7) decrement and can get the size of corresponding pressure value this moment, after the force value of arrival requirement of experiment top nut (6) tightened.
3. tensile load method of using a kind of chlorion as claimed in claim 1 osmotic coefficient investigating device in concrete is characterized in that:
Step a, between described the first pressing plate (1) and the second pressing plate (2), lay successively three test blocks (11), and between described three test blocks (11), separate with cushion block (12), all connect firmly with insulation encapsulated is gluing between described test block (11) and described the first pressing plate (1), the second pressing plate (2), the cushion block (12);
Step b after the described a step finishes, progressively tightens the nut (10) at middle part, measures the amount of tension of dish spring (8) with vernier caliper, looks into dish spring (8) stretching scale and obtains corresponding value of thrust.
4. method of testing of using a kind of chlorion as claimed in claim 1 osmotic coefficient investigating device in concrete is characterized in that:
Step c, with test block (11) side seal, the upper surface in described three test blocks (11) is bonded with rubber tube (16) with insulating gel respectively with fluid sealant;
Steps d, put into test specimen (11) on the tilt stand (15) of described plastic box (14) together with whole charger (13), in rubber tube (16), put into positive source (18), between tilt stand (15) and test block (11), place power cathode (17); In rubber tube (16) and plastic box (14), add respectively NaOH and sodium chloride solution, and energising, the DC voltage of employing 10 ~ 60V scope, range of current is at 0 ~ 360mA, and conduction time, scope was 6～96h;
Step e, after energising was finished, with test block (11) unloading, the test block of riving (11) was sprayed liquor argenti nitratis ophthalmicus at the section of riving immediately, measures the variable color degree of depth, brings following formula into and can obtain chloride diffusion coefficient:
Wherein, D is chloride diffusion coefficient (㎡/s), T be the initial and end temp of anodic dissolution mean value (℃), L is the thickness (mm) of test specimen, U is the test voltage (V) of switching on, t is conduction time (h), X
dBe the chloride permeability variable color degree of depth (mm).
5. method of testing according to claim 4, it is characterized in that: described fluid sealant is glass cement.
6. method of testing according to claim 5, it is characterized in that: the concentration of described sodium hydroxide solution is 0.3mol/L, and the massfraction of described sodium chloride solution is 10%, the concentration of described liquor argenti nitratis ophthalmicus is 0.lmol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210467992.XA CN102980839B (en) | 2012-11-19 | 2012-11-19 | Device and method for determination of permeability coefficient of chloride ions in concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210467992.XA CN102980839B (en) | 2012-11-19 | 2012-11-19 | Device and method for determination of permeability coefficient of chloride ions in concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102980839A true CN102980839A (en) | 2013-03-20 |
| CN102980839B CN102980839B (en) | 2014-11-26 |
Family
ID=47855061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210467992.XA Expired - Fee Related CN102980839B (en) | 2012-11-19 | 2012-11-19 | Device and method for determination of permeability coefficient of chloride ions in concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102980839B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278429A (en) * | 2013-05-13 | 2013-09-04 | 深圳大学 | Method for indirectly measuring concrete chloride ion diffusion coefficient |
| CN103364313A (en) * | 2013-07-08 | 2013-10-23 | 长沙理工大学 | Testing device and method for determining chloride ion diffusion mechanism of pre-stressed concrete under multi-factor effect |
| CN105973662A (en) * | 2016-05-04 | 2016-09-28 | 青岛理工大学 | Beam specimen casting die, and method for testing mechanical performances of beam specimen |
| CN106706498A (en) * | 2017-01-16 | 2017-05-24 | 哈尔滨工业大学 | Steady state water permeability coefficient testing device and method of concrete type material |
| CN109556968A (en) * | 2018-10-30 | 2019-04-02 | 南昌大学 | A kind of concrete is held to carry and be set and its test method |
| CN109655380A (en) * | 2018-12-20 | 2019-04-19 | 石家庄铁道大学 | The method of chloride ion diffusion coefficient in concrete is tested under bending load effect |
| CN109959697A (en) * | 2017-12-22 | 2019-07-02 | 深圳信息职业技术学院 | The devices and methods therefor of Chloride Ion in Concrete migration characteristic test |
| CN110530637A (en) * | 2019-08-29 | 2019-12-03 | 北京吾天科技有限公司 | Planetary roller screw dynamic property general-utility test platform |
| CN111122331A (en) * | 2019-12-09 | 2020-05-08 | 一汽解放汽车有限公司 | Membrane electrode testing device |
| CN114264459A (en) * | 2021-12-09 | 2022-04-01 | 北京特种机械研究所 | Movable loading test bed |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205944A (en) * | 1987-06-10 | 1988-12-21 | Pioneer Aggregates | Determination of chlorides in aggregate |
| US5229299A (en) * | 1992-04-21 | 1993-07-20 | Environmental Test Systems, Inc. | Test devices and methods for determining halides in aqueous samples |
| CN2669168Y (en) * | 2003-09-10 | 2005-01-05 | 江苏大学 | Load-variable testing table loading device of automobile steering device |
| CN101319981A (en) * | 2008-07-23 | 2008-12-10 | 中交第一公路工程局有限公司 | Measurement device for concrete permeability under load action |
| CN201163275Y (en) * | 2008-01-22 | 2008-12-10 | 中国建筑科学研究院 | Concrete RCM chlorine ion dispersion coefficient determinator |
| CN101482477A (en) * | 2009-02-23 | 2009-07-15 | 东南大学 | Test device and method for concrete permeability coefficient under action of pulling stress |
| CN102042949A (en) * | 2010-12-07 | 2011-05-04 | 河海大学 | Tensile loading device for testing permeability of concrete chloride ions and application thereof |
| CN102564916A (en) * | 2012-01-16 | 2012-07-11 | 河海大学 | Fast load testing device and method for chloride ion migration coefficient of concrete |
-
2012
- 2012-11-19 CN CN201210467992.XA patent/CN102980839B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205944A (en) * | 1987-06-10 | 1988-12-21 | Pioneer Aggregates | Determination of chlorides in aggregate |
| US5229299A (en) * | 1992-04-21 | 1993-07-20 | Environmental Test Systems, Inc. | Test devices and methods for determining halides in aqueous samples |
| CN2669168Y (en) * | 2003-09-10 | 2005-01-05 | 江苏大学 | Load-variable testing table loading device of automobile steering device |
| CN201163275Y (en) * | 2008-01-22 | 2008-12-10 | 中国建筑科学研究院 | Concrete RCM chlorine ion dispersion coefficient determinator |
| CN101319981A (en) * | 2008-07-23 | 2008-12-10 | 中交第一公路工程局有限公司 | Measurement device for concrete permeability under load action |
| CN101482477A (en) * | 2009-02-23 | 2009-07-15 | 东南大学 | Test device and method for concrete permeability coefficient under action of pulling stress |
| CN102042949A (en) * | 2010-12-07 | 2011-05-04 | 河海大学 | Tensile loading device for testing permeability of concrete chloride ions and application thereof |
| CN102564916A (en) * | 2012-01-16 | 2012-07-11 | 河海大学 | Fast load testing device and method for chloride ion migration coefficient of concrete |
Non-Patent Citations (1)
| Title |
|---|
| 方永浩等: "荷载作用下混凝土氯离子渗透性研究进展", 《硅酸盐学报》, vol. 40, no. 11, 31 October 2012 (2012-10-31) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278429A (en) * | 2013-05-13 | 2013-09-04 | 深圳大学 | Method for indirectly measuring concrete chloride ion diffusion coefficient |
| CN103364313A (en) * | 2013-07-08 | 2013-10-23 | 长沙理工大学 | Testing device and method for determining chloride ion diffusion mechanism of pre-stressed concrete under multi-factor effect |
| CN103364313B (en) * | 2013-07-08 | 2016-04-20 | 长沙理工大学 | A kind of method determining multifactor effect lower prestress concrete chloride ion diffusion mechanism |
| CN105973662A (en) * | 2016-05-04 | 2016-09-28 | 青岛理工大学 | Beam specimen casting die, and method for testing mechanical performances of beam specimen |
| CN105973662B (en) * | 2016-05-04 | 2019-01-18 | 青岛理工大学 | A kind of beam specimen pours the mechanic property test method of mold and beam specimen |
| CN106706498A (en) * | 2017-01-16 | 2017-05-24 | 哈尔滨工业大学 | Steady state water permeability coefficient testing device and method of concrete type material |
| CN109959697A (en) * | 2017-12-22 | 2019-07-02 | 深圳信息职业技术学院 | The devices and methods therefor of Chloride Ion in Concrete migration characteristic test |
| CN109959697B (en) * | 2017-12-22 | 2024-04-05 | 深圳信息职业技术学院 | Device and method for testing migration characteristics of chloride ions in concrete |
| CN109556968A (en) * | 2018-10-30 | 2019-04-02 | 南昌大学 | A kind of concrete is held to carry and be set and its test method |
| CN109655380A (en) * | 2018-12-20 | 2019-04-19 | 石家庄铁道大学 | The method of chloride ion diffusion coefficient in concrete is tested under bending load effect |
| CN110530637A (en) * | 2019-08-29 | 2019-12-03 | 北京吾天科技有限公司 | Planetary roller screw dynamic property general-utility test platform |
| CN110530637B (en) * | 2019-08-29 | 2021-06-15 | 北京吾天科技有限公司 | Universal test platform for dynamic performance of planetary roller screw |
| CN111122331A (en) * | 2019-12-09 | 2020-05-08 | 一汽解放汽车有限公司 | Membrane electrode testing device |
| CN114264459A (en) * | 2021-12-09 | 2022-04-01 | 北京特种机械研究所 | Movable loading test bed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102980839B (en) | 2014-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102980839B (en) | Device and method for determination of permeability coefficient of chloride ions in concrete | |
| LU500213B1 (en) | Concrete loading device for simulating stress state of any point of tunnel | |
| CN101718671B (en) | Loading device for testing permeability of concrete chloride ions and test method | |
| CN102721637B (en) | Multi-functional test system and method for concrete durability under action of continuous pressure | |
| Ye et al. | Experimental study on shear and creep behaviour of green tuff at high temperatures | |
| Liu et al. | Freeze-thaw damage evolution of fractured rock mass using nuclear magnetic resonance technology | |
| Xu et al. | Investigation on the behavior of frozen silty clay subjected to monotonic and cyclic triaxial loading | |
| CN103293093B (en) | Deep-sea stress corrosion with ooze hydrogen experimental simulation device | |
| CN108918223A (en) | A kind of paste filling material laboratory maintenance process of the practical stope environment of simulation | |
| CN105352884A (en) | Experiment method and experiment member for testing bond strength of concrete and coal, rock or concrete | |
| CN102565307A (en) | Tester and testing method for variable pressure and variable temperature accelerated corrosion | |
| Zhang et al. | Experimental investigation on permeability evolution of limestone caprock under coupled THM processes | |
| Ghanbari et al. | Development of an empirical criterion for predicting the hydraulic fracturing in the core of earth dams | |
| CN105547988A (en) | Reinforced concrete corrosion test device and test method | |
| CN102128773A (en) | Tensile load applying device for concrete chloride ion permeability test and test method | |
| Wang et al. | Effect of colloid solution concentration of epoxy resin on properties of rust-cracked reinforced concrete repaired by electrophoretic deposition | |
| Elvery et al. | A direct tensile test for concrete under long-or short-term loading | |
| CN105466814A (en) | Assessment system and method of concrete chloride ion diffusion coefficient | |
| Zhang et al. | Effect of freeze-thaw cycles on mechanical behavior of clay-gravel mixtures | |
| CN202512108U (en) | Variable-pressure variable-temperature accelerated corrosion testing instrument | |
| CN107941688A (en) | Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient | |
| Reis et al. | Performance of a cubical triaxial apparatus for testing saturated and unsaturated soils | |
| Yue-dong et al. | Distribution and basic characteristics of new transparent clay | |
| CN102721710B (en) | Device and method for acquiring dynamic distribution of diffusible hydrogen under static load gradient tensile stress | |
| Jiang et al. | Stress-strain behavior of gabion in compression test and direct shear test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20161119 |