CN102128773A - Tensile load applying device for concrete chloride ion permeability test and test method - Google Patents
Tensile load applying device for concrete chloride ion permeability test and test method Download PDFInfo
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- CN102128773A CN102128773A CN 201010576461 CN201010576461A CN102128773A CN 102128773 A CN102128773 A CN 102128773A CN 201010576461 CN201010576461 CN 201010576461 CN 201010576461 A CN201010576461 A CN 201010576461A CN 102128773 A CN102128773 A CN 102128773A
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- stretching
- steel plate
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- concrete
- permeability
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- 239000004567 concrete Substances 0.000 title claims abstract description 115
- 230000035699 permeability Effects 0.000 title claims abstract description 60
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 110
- 239000010959 steel Substances 0.000 claims abstract description 110
- 238000007906 compression Methods 0.000 claims abstract description 47
- 238000003869 coulometry Methods 0.000 claims description 23
- 239000000953 sodium hydroxide Substances 0.000 claims description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 3
- 229910001856 sodium hydroxide Inorganic materials 0.000 claims description 3
- 238000000034 methods Methods 0.000 abstract description 3
- 238000010586 diagrams Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixtures Substances 0.000 description 4
- 239000011901 water Substances 0.000 description 4
- 241000370738 Chlorion Species 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000003014 reinforcing Effects 0.000 description 2
- 238000003556 assay method Methods 0.000 description 1
- 239000004568 cements Substances 0.000 description 1
- 238000006243 chemical reactions Methods 0.000 description 1
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- 239000002245 particles Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
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Abstract
Description
Technical field
The present invention relates to a kind of proving installation and method of measuring permeability of concrete chloride ions, specifically relate to a kind of in the coulometry loading device for testing and the test method that continue permeability of concrete chloride ions under the tensile load condition.
Background technology
For reinforced concrete structures such as sea port dock, underground works, Hydraulic and Hydro-Power Engineering structures, concrete anti-water permeability and chloride ion permeability are one of of paramount importance performance index.Chloride ion permeability be in the reinforced concrete concrete resist the important symbol that chlorion corrodes, the protection reinforcing bar is avoided erosional competency, also can characterize concrete anti-water permeability to a certain extent.At present the assay method of the permeability of concrete chloride ions that adopts mainly contains coulometry and chlorion transfer method fast, but tested test specimen does not relate to the effect of load in two kinds of methods.Yet actual in commission reinforced concrete structure not only stands the effect that hydraulic pressure and chlorine ion concentration difference etc. influence the extraneous factor of chloride permeability, usually the osmosis of bearing various forms of loads and seawater and chlorion simultaneously.Load, especially tensile load tend to influence the generation and the expansion of microfracture in the concrete, influence concrete perviousness, comprise chloride ion permeability.Present many country adopt by U.S. material standard and the test standard (ASTM C1202) that is used to estimate concrete opposing chloride permeability ability that association formulated, it is the DC voltage that applies 60V at the concrete sample two ends of Φ 95 * 50 mm, estimate concrete perviousness by detecting the electric weight size that flows through in the 6h, equipment therefor and method are not considered, can't be realized tested test specimen is applied all kinds of loads simultaneously yet.Patent CN 101699267 A(application numbers 200910184937.8 in the bulletin) a kind of permeability of concrete chloride ions coulometry loading device for testing and method of testing are disclosed; Patent CN 101718671 A(application numbers 200910212680.2 in the bulletin) a kind of charger and method of testing of testing permeability of concrete chloride ions are disclosed; Patent CN 101074912 A(application numbers 200710023139.8) permeance property proving installation and the method for testing of concrete for hydraulic structure under load action disclosed; Owing to be subjected to the restriction of conventional test device, the method for testing that continues permeability of concrete chloride ions under the tensile load condition be still blank.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of and can apply tensile load, be used for the charger of coulometry test permeability of concrete chloride ions concrete.
Another object of the present invention provides a kind ofly utilizes this charger to carry out permeability of concrete chloride ions coulometry method of testing.
The objective of the invention is to be achieved through the following technical solutions:
The charger of permeability of concrete chloride ions, steel sole plate are provided with four screws, are screwed into four parallel screw rods in the screw, are with four compression springs and stretching steel plate, compression steel plate and the top board parallel with described steel sole plate on the described screw rod successively; Be provided with lifting jack between top board and the compression steel plate; Be provided with the pressure dynamometer between compression steel plate and the stretching steel plate, described dynamometer comprises pressure transducer and Displaying Meter; Be with stretching steel plate bolt cap on the screw rod on stretching steel plate top, on the screw rod of compression steel plate bottom, be with compression steel plate bolt cap, on the screw rod of top board upper and lower, be with the first set bolt cap and following set bolt cap;
The steel sole plate surrounding respectively is provided with one first screw, respectively is provided with one second screw with position directly over the steel sole plate through hole on the stretching steel plate, and the aperture of described second screw is not less than the aperture of described first screw; Respectively be inserted with a stretching screw rod in four second screws on the stretching steel plate, the stretching screw rod stretching steel plate top be with on the ball seat and the set bolt cap of lower through-hole, stretching screw rod lower end is connected with the ergographic sensor that stretches, and described stretching dynamometer comprises pulling force sensor and Displaying Meter;
The straight four prisms cylinder concrete sample two ends that are used to test are bonded with stretching web member and following stretching web member with structure glue; Two stretching web members constitute by being connected to the RC screw rod of steel plate with unidimensional steel plate of test specimen section and vertical welding.
The principle of work of charger of the present invention is: unclamp compression steel plate bolt cap, exert pressure with the jack pair compression steel plate, the pressure size is measured by the pressure dynamometer; The pressure that lifting jack produces is applied on four compression springs by compression steel plate, pressure dynamometer and stretching steel plate; When dynamometer display setting force value, tighten stretching steel plate bolt cap, make spring be in compressive state; The following stretching web member screw rod of concrete sample lower end is screwed into the screw on the steel sole plate periphery, and the connection that stretches of going up of concrete sample upper end is connected with the ergographic sensor of stretching of stretching screw rod lower end; Unclamp stretching steel plate bolt cap, the former screen resilience that is compressed spring has just applied stable tensile load by stretching steel plate, stretching screw rod, stretching dynamometer and last stretching web member to concrete sample; The actual load size of bearing of each test specimen is measured by the stretching dynamometer of its connection; Regulate the set bolt cap of the screw rod that respectively stretches, can make two pairs of concrete samples facing each other bear identical or different tensile load; The through hole ball seat that is arranged at stretching screw rod top can guarantee that concrete sample stands axial tension merely.
Another function of the present invention is achieved in that the method for utilizing above-mentioned charger to carry out the test of permeability of concrete chloride ions coulometry, carries out as follows:
Step 1, exert pressure with the jack pair compression steel plate, pressure is applied on four compression springs by compression steel plate, pressure dynamometer and stretching steel plate, when dynamometer display setting force value, tightens stretching steel plate bolt cap; The following stretching web member screw rod of concrete sample lower end is screwed into screw on the steel sole plate periphery, and the last stretching web member of concrete sample upper end is connected with the stretching dynamometer of stretching screw rod lower end, unclamps stretching steel plate bolt cap;
The former screen resilience that is compressed spring has applied stable tensile load by stretching steel plate, stretching screw rod, stretching dynamometer and last stretching web member to concrete sample;
Regulate the set bolt cap of the screw rod that respectively stretches, make two pairs of concrete samples facing each other bear identical or different tensile load by the test setting.
The tensile load Fi of each test specimen is calculated as follows:
In the formula: Fi---i test specimen tensile load (N); Ft---concrete sample tensile strength (MPa); I---i test specimen set stress level (%); B---specimen width (mm); H---test specimen height (mm).
The jack pair compression spring applies presses the big I of load to be slightly larger than all test specimen tensile load sums, so that single test specimen load is adjusted.
Step 2, the electroded test flume of a pair of permeability of concrete chloride ions electric pilot is installed on the relative side of concrete sample two.In anodal test flume, fill with NaOH solution, in the negative pole test flume, fill with solution, adopt 50～120 V DC voltage, the interior electric weight of regulation test specimen during test different stretch load action by concrete sample.
Step 3:, calculate the equivalent energising amount that characterizes permeability of concrete chloride ions according to specimen thickness, institute's making alive and energising amount.
Measure record current initial reading I0, measure record current reading Ii once every 15 min later on,, be calculated as follows the total electric weight Q that passes through concrete sample in 6 h until 6 h:
In the formula: the total electric weight (C) that passes through concrete sample in Q-6 h; The current indication that Ii-the i time records (A); The current indication that Ii-1-the i-1 time records (A).
By following formula total electric weight being converted to specimen thickness is 50 mm, the equivalent energising amount when DC voltage is 60 V:
In the formula: the equivalent energising amount (C) of passing through concrete sample in Qe-6 h; B---prism concrete sample thickness (mm); V---DC voltage (V).
Get on the same group 3 test specimens by when the mean value of volume and electricity,, estimate the chloride ion permeability of concrete under this loaded state by Fig. 5 as the equivalent energising amount of this group test specimen.
The present invention has following beneficial effect:
Therefore (1) having solved conventional testing permeability of concrete chloride ions device can not apply lasting tensile load, can not simulate at labour concrete component real load state, can't measure the problem of permeability of concrete chloride ions under the tensile load condition test specimen.
(2) adopt the tensile load charger concrete sample to be applied the tensile load of different sizes, can study of the influence of tensile load condition to permeability of concrete chloride ions, thereby disclose concrete permeability development law under the multifactor combination condition, micromechanism of damage and combination mechanism, if be applied to actual engineering, the design, Gernral Check-up and the reinforcing that can be xoncrete structure provide foundation.
(3) apparatus structure is simple, and is easy to operate, and load is stablized, can be shown in real time in the test process, and can adjust at any time on demand, load step by step, and test result is stable, reliable.
(4) can be simultaneously two or four test specimens be carried out the chloride permeability property testing, can apply the different stretch load respectively to two pairs of test specimens when testing four test specimens simultaneously, can save test period greatly.
Description of drawings
Fig. 1 is the structural representation of the coulometry test tensile loading device of permeability of concrete chloride ions of the present invention;
Fig. 2 is the coulometry proving installation assembling synoptic diagram that the permeability of concrete chloride ions of straight four prisms cylinder concrete sample and permeability of concrete chloride ions electric pilot test flume is installed;
Fig. 2 (b) is the A-A cross section view of Fig. 2;
Fig. 2 (c) is the B-B cross section view of Fig. 2;
The synoptic diagram of Fig. 3 permeability of concrete chloride ions electric pilot test flume concrete sample;
Fig. 4 is the synoptic diagram of the stretching web member of two ends useful structure glue bond;
Fig. 5 is based on the synoptic diagram of the chloride ion permeability of equivalent energising amount;
The synoptic diagram of Fig. 6 concrete mix and test specimen tensile strength;
The synoptic diagram of the coulometry measurement result of concrete for hydraulic structure chloride ion permeability under Fig. 7 different stretch loading condition.
Among the figure: 1. steel sole plate; 2. screw rod; 3. compression spring; 4. stretching steel plate; 5. stretching steel plate bolt cap; 6. compression steel plate bolt cap; 7. compression steel plate; 8. the second set bolt cap; 9. top board; 10. the first set bolt cap; 11. lifting jack; 12. pressure dynamometer; 13. stretching screw rod; 14. stretching screw rod set bolt cap; 15. through hole ball seat; 16. stretching dynamometer; 17. last stretching web member; 18. concrete sample; 19. permeability of concrete chloride ions electric pilot test flume; 20. following stretching web member; 21. first through hole; 22. second through hole; 23. first screw; 24. second screw.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
The coulometry test tensile load charger of embodiment 1 permeability of concrete chloride ions
The coulometry test tensile loading device of permeability of concrete chloride ions, it is to be made of steel sole plate 1, screw rod 2, compression spring 3, stretching steel plate 4, stretching steel plate bolt cap 5, compression steel plate bolt cap 6, compression steel plate 7, the second set bolt cap 8, top board 9, the first set bolt cap 10, lifting jack 11, pressure dynamometer 12, stretching screw rod 13, stretching screw rod set bolt cap 14, through hole ball seat 15, stretching dynamometer 16;
Steel sole plate 1, stretching steel plate 4, compression steel plate 7 and top board 9 are the square that the length of side is 500 mm, and the thickness of steel sole plate 1 is 30 mm, and the thickness of stretching steel plate 4, compression steel plate 7 and top board 9 is 20 mm;
Respectively there is a M30 first screw 23 near the 70mm place that is from both sides of four drift angles of steel sole plate 1, four drift angle annexes of stretching steel plate 4, compression steel plate 7 and top board 9 are the 70mm place from both sides respectively have a φ 34 mm second screw 24,20 mm places respectively have first through hole 21 of a M20, the surrounding of stretching steel plate 4 to hit exactly second through hole 22 that respectively there are φ 26 mm at from the edge 20 mm places from the edge for steel sole plate 1 surrounding center;
With four long 1200 mm, the screw rod 2 of M 30 is screwed into four screws of steel floor 1, screw rod 2 is passed compression spring 3, stretching steel plate 4, stretching steel plate bolt cap 5, compression steel plate bolt cap 6, compression steel plate 7, the second set bolt cap 8, top board 9, the first set bolt cap 10 of high 550mm, elasticity coefficient 200 N/mm respectively, place the lifting jack 11 of 50 kN in compression steel plate 7 middles, placing maximum range in stretching steel plate 4 middles is the pressure dynamometer 12 of 50 kN; Four M, 20 stretching screw rods 13 are penetrated four circular holes of stretching steel plate 3 peripheries, diameter 60 mm are inserted in the upper end, high 40mm, there is the ball seat 15 and the stretching screw rod set bolt cap 14 of a φ 26 mm through holes the centre, and the lower end maximum range of screwing on is the stretching dynamometer 16 of 20 kN.
Embodiment
Coulometry test tensile load loading method---four loads such as test specimen of 2 permeability of concrete chloride ions
Unclamp compression steel plate bolt cap 6, with 7 pressurizations of 11 pairs of compression steel plates of lifting jack, the pressure size is shown by pressure dynamometer 12, when reaching 44 kN, tightens stretching steel plate bolt cap 5, and this moment, four compression springs 3 bore the pressure of 44 kN altogether; The following stretching web member screw rod 20 of concrete sample 18 that four two ends is bonded with length 100 mm, thick 55 mm, the high 200mm of stretching web member 17 and following stretching web member 20 is screwed into four first screws 23 of steel sole plate 1 periphery, last stretching web member 17 and corresponding stretching dynamometer 16 connections;
Slowly unclamp stretching steel plate bolt cap 5, and regulate four stretching screw rod set bolt caps 14, the value of thrust of observing four stretching dynamometers 16 show, keep impartial growth of four concrete samples, 18 suffered pulling force, make when four stretching steel plate bolt caps 5 are totally released, each concrete sample 18 is subjected to pulling force to be 11kN, and tension is 2 MPa
Embodiment
The coulometry of 3 permeability of concrete chloride ions test tensile load loading method---four test specimen two pairs of test specimen loads facing each other do not wait
Unclamp compression steel plate bolt cap 6, with 7 pressurizations of 11 pairs of compression steel plates of lifting jack, the pressure size is shown by pressure dynamometer 12, when reaching 33 kN, tightens stretching steel plate bolt cap 5, and this moment, four compression springs bore the pressure of 33 kN altogether; The following stretching web member screw rod 20 of concrete sample 18 that four two ends is bonded with the length of side 100 mm, thick 55 mm, the high 200mm of stretching web member 17 and following stretching web member 20 is screwed into four first through holes 21 of steel sole plate 1 periphery, last stretching web member 17 and corresponding stretching dynamometer 16 connections;
Slowly unclamp stretching steel plate bolt cap 5, and regulate four stretching screw rod set bolt caps 14, the value of thrust of observing four stretching dynamometers 16 show, keeping two pairs of suffered pulling force of test specimen facing each other increases with 1:2, make when four stretching steel plate bolt caps 5 are totally released, two pairs of concrete sample 18 suffered pulling force sizes are 1:2, what a pair of concrete sample 18 was arranged this moment is subjected to pulling force 11 kN, tension is 2 MPa, another is subjected to pulling force 5.5 kN to concrete sample 18, and tension is 1 Mpa.
Embodiment
The coulometry of 4 permeability of concrete chloride ions is tested tensile load loading method---two test specimens, and load equates
Unclamp compression steel plate bolt cap 6, with 7 pressurizations of 11 pairs of compression steel plates of lifting jack, the pressure size is shown by pressure dynamometer 12, when reaching 44 kN, tightens stretching steel plate bolt cap 5, and this moment, four compression springs 3 bore the pressure of 44 kN altogether; The following stretching web member 20 of concrete sample that two two ends is bonded with length 100 mm, thick 55 mm, the high 200mm of stretching web member 17 and following stretching web member 20 is screwed into two first through holes 21 of 1 liang of relative periphery of steel sole plate, last stretching web member 17 and corresponding stretching dynamometer 16 connections;
Slowly unclamp stretching steel plate bolt cap 5, and adjusting is connected with two stretching screw rod set bolt caps 14 of test specimen, the value of thrust of observing two stretching dynamometers 16 show, keep impartial growth of two concrete samples, 18 suffered pulling force, make when two stretching steel plate bolt caps 5 are totally released, each concrete sample 18 is subjected to pulling force to be 22 kN, and tension is 4 Mpa.
Embodiment
The coulometry method of testing of concrete for hydraulic structure chloride ion permeability under the 5 tensile load conditions
With P II 42.5 class g cements, artificial rubble of Irish touchstone that modulus of fineness is 2.32 river sand, maximum particle diameter is 16 mm and tap water are by the concrete batching of match ratio shown in the table 2, be molded into the straight four prisms cylinder concrete sample 18 of 100 mm * 55 mm * 200 mm, 21 concrete samples 18 of each proportioning.Concrete sample 18 takes out behind maintenance 24 d in concrete standard fog room water, treats to use steel bonding glue with the two ends of stretching web member bonding with concrete sample 18 after the dry tack free, after solidifying 48 h under the room temperature of 25oC, enters maintenance 48 h in the water again.Get the reference of 3 sizes of loading when measuring pulling strengrths and carrying out the chloride ion permeability test in the concrete sample 18 of each proportioning as all the other test specimens.
According to Fig. 6 concrete mix and test specimen tensile strength, each proportioning is divided into 5 groups, is respectively 0,20% by the tensile load level, and 40%, 50%, 60% 5 kind of load mode is measured, and measures 3 test specimens for every group.
Step 1: by embodiment 1 to embodiment 4 described method prism concrete sample 18 is installed on charger and sets the horizontal load application of requirement tensile load by test, each concrete sample 18 applies at every turn presses payload values to be calculated as follows:
Step 2: the electroded test flume 19 of a pair of concrete permeability electric pilot is installed on 18 liang of relative free face of each concrete sample.In anodal test flume, fill with 0.3 mol/L NaOH solution, in the negative pole test flume, fill with 3%NaCl solution, the both positive and negative polarity of test flume 19 is connected with the concrete permeability electric pilot, energized, above-mentioned two test flumes, 19 positive and negative electrodes are applied 60 V direct current constant voltages, measure record current initial reading I0, measure record current reading Ii once every 10 min later on, until 6 h.Be calculated as follows the total electric weight Q that passes through concrete sample in 6 h:
In the formula: Q---pass through total electric weight (C) of concrete sample in 6 h; Ii---the current indication (A) that records for the i time.
Press following formula total energising amount Q conversion be equivalent energising amount Qe:
Get the mean value of 3 test specimens by electric weight on the same group, estimate the resistance of chloride ion penetration of concrete under this loaded state as the energising amount of this group test specimen.The results are shown in as shown in Figure 7.
As can be seen from the test results:
(1) with embodiment 1 described device, adopts the loading method of embodiment 2,3 and 4, can effectively carry out the coulometry test of permeability of concrete chloride ions under the tensile load condition.
The electric flux (be chloride ion permeability) of (2) three kinds of concrete that intensity is different under tensile load all demonstrated identical Changing Pattern.Along with the increase of the level of loading, concrete chloride ion permeability improves gradually.This is owing under the tensile load effect, the original micro-crack extension in the concrete, and new micro-crack produces, thereby has improved concrete perviousness.When the loading level reaches 60%, the chloride ion permeability of test specimen increases rapidly, and this is owing to continuing under the high load level, various crack propagation degree increase rapidly in addition fracture due to.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
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| CN102621049A (en) * | 2012-01-16 | 2012-08-01 | 河海大学 | Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof |
| CN103234902A (en) * | 2013-04-23 | 2013-08-07 | 金陵科技学院 | Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state |
| CN105571947A (en) * | 2016-02-16 | 2016-05-11 | 南京南瑞集团公司 | Tensile creep testing device capable of testing multiple groups of samples synchronously under temperature and humidity control condition |
| CN105973576A (en) * | 2016-03-28 | 2016-09-28 | 合肥工业大学 | Simple device applied to hinge support component manual loading compression test |
| 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 |
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| CN102621049A (en) * | 2012-01-16 | 2012-08-01 | 河海大学 | Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof |
| CN102621049B (en) * | 2012-01-16 | 2014-03-26 | 河海大学 | Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof |
| CN103234902A (en) * | 2013-04-23 | 2013-08-07 | 金陵科技学院 | Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state |
| CN105571947A (en) * | 2016-02-16 | 2016-05-11 | 南京南瑞集团公司 | Tensile creep testing device capable of testing multiple groups of samples synchronously under temperature and humidity control condition |
| CN105973576A (en) * | 2016-03-28 | 2016-09-28 | 合肥工业大学 | Simple device applied to hinge support component manual loading compression test |
| 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 |
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