CN109827896A - Concrete half impregnates anti-seawater corrosion experimental rig and its test method - Google Patents
Concrete half impregnates anti-seawater corrosion experimental rig and its test method Download PDFInfo
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- CN109827896A CN109827896A CN201910299744.0A CN201910299744A CN109827896A CN 109827896 A CN109827896 A CN 109827896A CN 201910299744 A CN201910299744 A CN 201910299744A CN 109827896 A CN109827896 A CN 109827896A
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- 239000004567 concrete Substances 0.000 title claims abstract description 55
- 239000013535 sea water Substances 0.000 title claims abstract description 18
- 238000005260 corrosion Methods 0.000 title claims abstract description 17
- 230000007797 corrosion Effects 0.000 title claims abstract description 17
- 238000010998 test method Methods 0.000 title claims description 7
- 238000012360 testing method Methods 0.000 claims abstract description 77
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 15
- 230000003628 erosive effect Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 238000007654 immersion Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007716 flux method Methods 0.000 description 2
- 230000037427 ion transport Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a kind of concrete half to impregnate anti-seawater corrosion experimental rig, including shell, middle part is horizontally disposed in shell has permeable orifice plate that housing cavity is divided into the solution storehouse that top accommodates the test specimen storehouse and lower containment solution of test specimen, it is located above permeable orifice plate in test specimen storehouse and is arranged at intervals with the positioning plate for being provided with test specimen jack, the roof in test specimen storehouse is provided with air-heater, the side wall in test specimen storehouse offers air outlet, and concrete center test specimen is provided in test specimen storehouse；Heating device is provided in solution storehouse, solution orlop wall offers leakage fluid dram；The control signal output of the control signal input and single-chip microcontroller of air-heater and heating device connects, and the humidity sensor signal output end of concrete center test specimen is connect with single-chip microcomputer signal input terminal.For the present invention at present using more complete immersion compared with dry, wet endless form, the practical etch state of concrete structure is more true, accurate.
Description
Technical field
The present invention relates to endurance performance of concrete testing fields, impregnate anti-seawater corrosion test more particularly, to concrete half
Device and its test method.
Background technique
The resistant to sea water erosion performance of concrete is the importance of marine worker and polyacrylonitrile fiber concrete endurance quality.In most of feelings
Under condition, the seawater corrosion process of concrete includes the corrosion under corrosion and chemical action under physical action simultaneously.Physical action
Refer to that the salt in seawater evaporates the crystallization to be formed by migration, moisture, crystallization causes bulk product to expand, and is formed mixed
Solidifying soil cracking seam and peeling；Chemical action refers to that secondary response occurs for the hydrated product in salt and concrete in seawater, raw
New product is produced, original crystalline texture and stable state are destroyed.It is most fast that engineering practice shows that concrete corrodes in the seawater
Position is SEA LEVEL VARIATION alternation of wetting and drying area, this region with strong moisture evaporation under wick effect effect due to invading
Corrosion substance is promoted to more than seawater liquid level, and secondary response occurs with concrete hydrating product, and dry along with itself is tied
Brilliant and superstructure constraint, forms strong expansion crystallographic pressure, leads to microcrack and destroy to occur.
For the resistant to sea water erosion performance for evaluating concrete, generally utilized using electric flux method or RCM method, both methods
Electric current driving accelerates migration of the chloride ion in concrete, achievees the purpose that Fast Evaluation agent on crack resistance of concrete chloride ion transport performance.
Since in such a way that electric current acceleration changes chloride ion transport, to evaluating, steel fiber reinforced concrete, hydrophobic concrete etc. are special to be mixed
Not applicable when solidifying soil, scholars are to both methods so far there are querying and improving always.In addition, electric flux method or RCM method
Migration of the chloride ion in concrete can only be evaluated, other substances such as sulfate, magnesium salts etc. can not be evaluated.
Summary of the invention
It is an object of that present invention to provide a kind of concrete half to impregnate anti-seawater corrosion experimental rig, the present invention another object is that
The test method of the experimental rig is provided.
To achieve the above object, the present invention takes following technical proposals:
Concrete of the present invention half impregnates anti-seawater corrosion experimental rig, including shell, is located at middle part water in the shell
It is flat to be provided with permeable orifice plate, the permeable orifice plate by housing cavity be divided into top accommodate test specimen test specimen storehouse and lower containment it is molten
The solution storehouse of liquid；It is located above permeable orifice plate in the test specimen storehouse and is arranged at intervals with the positioning plate for being provided with test specimen jack, test specimen storehouse
Roof or side wall on be provided with air-heater, offer air outlet on the side wall or roof in test specimen storehouse, be provided in test specimen storehouse
Concrete center test specimen；It is provided with heating device in the solution storehouse, offers leakage fluid dram on the bottom wall in solution storehouse；The hot wind
The control signal output of the control signal input and single-chip microcontroller of machine and heating device connects, concrete center test specimen
Humidity sensor signal output end is connect with the signal input part of the single-chip microcontroller.
The air-heater is arranged on the roof in the test specimen storehouse, and the air outlet is provided with the side wall in test specimen storehouse.
The leakage fluid dram is connected with the drain pipe with tapping valve；The positioning plate is varying height positions section structure.
The test method of experimental rig of the present invention, includes the following steps:
Step 1 prepares cube concrete sample according to the proportion of setting, when the concrete sample preparation forms, wherein
The forming surface center of one concrete sample remains for installing in advance the hole of humidity sensor, is embedded to humidity sensor after demoulding
Device, it is with microdilatancy mortar that humidity sensor and surrounding filling is closely knit, concrete center test specimen is made；
Step 2, by after molding concrete sample and concrete center test piece maintenance to regulation age, in 80 ± 5 DEG C of items
Dried under part 48 hours it is spare；
Concrete sample 5 and concrete center test specimen are put into the test specimen jack of positioning plate by step 3, then will be prepared
Corrosive liquid is added in solution storehouse, and the board bottom face of liquid level to positioning plate is stopped, by the signal wire and single-chip microcontroller of humidity sensor
Signal input part connection；
Step 4, setting humidity control value and corrosive liquid temperature controlling value, starting single-chip computer control system start to test；
Formation of concrete test specimen is taken out after the time that step 5, test reach setting, observes surface crack and peeling conditions, is carried out
Compressive strength test；Then compressive strength test data and same period mark curing concrete intensity are compared, intensity can be calculated
Reduction coefficient, and then evaluate the corrosion resistance of concrete sample.
The invention has the advantages that etching fluid is covered by positioning plate, reduce lower part corrosive liquid moisture in test process
In evaporation to reduce upper air humidity.Mechanism is impregnated by half, simulates the physics in chemical attack and change to greatest extent
Coupling is learned, close to the practical military service operating condition of concrete component.The present invention and dry, the wet circulation using more complete immersion at present
Mode is compared, and the practical etch state of concrete structure is more true, accurate.
Detailed description of the invention
Fig. 1 is experimental rig structural schematic diagram of the present invention.
Fig. 2 is the A-A of Fig. 1 to schematic cross-sectional view.
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention, the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
State embodiment.
As shown in Figure 1, 2, concrete of the present invention half impregnates anti-seawater corrosion experimental rig, including shell 1, is located at
Middle part is horizontally disposed in shell 1 a permeable orifice plate 2, and permeable orifice plate 2 is the permeable plastic plate in close hole, and permeable orifice plate 2 is by 1 inner cavity of shell
It is divided into top and accommodates the test specimen storehouse 3 of test specimen and the solution storehouse 4 of lower containment solution；It is located at permeable 2 top of orifice plate in test specimen storehouse 3
It is spaced the half of 5 height of 50mm(concrete sample) it is provided with the positioning plate 6 for being provided with test specimen jack, test specimen jack is to be uniformly distributed
28 102mm × 102mm jack；4 air-heaters 7 are uniformly arranged on the roof in test specimen storehouse 3, on the side wall in test specimen storehouse 3
Air outlet 8 is offered, concrete center test specimen 13 is provided in test specimen storehouse 3；Being horizontally disposed in solution storehouse 4 has heating tube 10,
Leakage fluid dram is offered on the bottom wall in solution storehouse 4, leakage fluid dram is connected with the drain pipe 11 with tapping valve；Air-heater 7 and heating
The control signal input of pipe 10 is connect with the control signal output of single-chip microcontroller 12, the humidity sensor of concrete center test specimen 13
9 signal output end of device is connect with the signal input part of single-chip microcontroller 12.
The test method of experimental rig of the present invention, includes the following steps:
Step 1 prepares 100mm × 100mm × 100mm cube concrete sample 5, concrete sample according to the proportion of setting
When 5 preparation molding, remain for installing the hole of humidity sensor 9 in advance in the forming surface center of a wherein concrete sample,
Humidity sensor 9 is embedded to after demoulding, humidity sensor 9 is filled closely knit, system with surrounding with microdilatancy mortar by depth of burying 30mm
At concrete center test specimen 13；
Step 2 conserves molding concrete sample 5 and concrete center test specimen 13 to regulation age, in 80 ± 5 DEG C of conditions
Lower drying 48 hours spare；
Concrete sample 5 and concrete center test specimen 13 are put into the test specimen jack of positioning plate 6 by step 3, then will be prepared
Corrosive liquid be added in solution storehouse 4, the board bottom face of liquid level to positioning plate 6 is stopped, by the signal wire and list of humidity sensor 9
The signal input part of piece machine 12 connects；The preparation of corrosive liquid is prepared using the formula of table 1；
Formula (the kg/m of 1 artificial seawater of table3)
Step 4, setting humidity control value and corrosive liquid temperature controlling value, starting single-chip computer control system start to test；
Concrete sample 5 is taken out after the time that step 5, test reach setting, observes surface crack and peeling conditions, carries out resistance to compression
Strength test；Then compressive strength test data and same period mark curing concrete intensity are compared, strength degradation can be calculated
Coefficient, and then evaluate the corrosion resistance of concrete sample 5.
The present invention is by the humidity sensor 9 in concrete center test specimen 13, so that the crucial ginseng of half soak test control
Number reaches quantification, and when the humidity of concrete sample 5 is higher than setting value 5%, the starting of air-heater 7 starts to dehumidify, when concrete tries
The humidity of part 5 stops when being lower than setting value 5%, and the significant variable of soak test is controlled, and the reproducibility of test greatly increases.
Previous research is similar to the example also having in the document corroded using half immersion way, the upper exposed of concrete sample
In air.It is well known that the humidity of different time and the surrounding air in space is completely different, to inside concrete water
Point evaporation rate influence very big, therefore just reduce the comparativity between the tests of different batches.Also, in surrounding air
The speed of natural evaporation is slower, cannot achieve accelerator.The present invention accelerates capillary absorption effect by top hot wind, promotes rotten
Erosion liquid enters inside concrete and forms secondary chemical reaction and crystallographic expansion, accelerates chemical reaction and degradation speed, improves
Test efficiency controls test specimen interior humidity by setting concrete center test specimen, improves the comparativity between each test and section
The property learned.
Claims (4)
1. a kind of concrete half impregnates anti-seawater corrosion experimental rig, including shell, it is characterised in that: in being located in the shell
Portion is horizontally disposed permeable orifice plate, and housing cavity is divided into test specimen storehouse and the lower part appearance that top accommodates test specimen by the permeable orifice plate
Receive the solution storehouse of solution；It is located above permeable orifice plate in the test specimen storehouse and is arranged at intervals with the positioning plate for being provided with test specimen jack, tries
It is provided with air-heater on the roof or side wall in part storehouse, offers air outlet on the side wall or roof in test specimen storehouse, is set in test specimen storehouse
It is equipped with concrete center test specimen；It is provided with heating device in the solution storehouse, offers leakage fluid dram on the bottom wall in solution storehouse；It is described
The control signal output of the control signal input and single-chip microcontroller of air-heater and heating device connects, the concrete center examination
The humidity sensor signal output end of part is connect with the signal input part of the single-chip microcontroller.
2. concrete according to claim 1 half impregnates anti-seawater corrosion experimental rig, it is characterised in that: the air-heater
It is arranged on the roof in the test specimen storehouse, the air outlet is provided with the side wall in test specimen storehouse.
3. concrete according to claim 1 or 2 half impregnates anti-seawater corrosion experimental rig, it is characterised in that: the row
Liquid mouth is connected with the drain pipe with tapping valve；The positioning plate is varying height positions section structure.
4. the test method of experimental rig according to claim 1, it is characterised in that: include the following steps:
Step 1 prepares cube concrete sample according to the proportion of setting, when the concrete sample preparation forms, wherein
The forming surface center of one concrete sample remains for installing in advance the hole of humidity sensor, is embedded to humidity sensor after demoulding
Device, it is with microdilatancy mortar that humidity sensor and surrounding filling is closely knit, concrete center test specimen is made；
Step 2, by after molding concrete sample and concrete center test piece maintenance to regulation age, in 80 ± 5 DEG C of items
Dried under part 48 hours it is spare；
Concrete sample and concrete center test specimen are put into the test specimen jack of positioning plate by step 3, then by prepared corruption
Erosion liquid is added in solution storehouse, and the board bottom face of liquid level to positioning plate is stopped, by the signal wire of humidity sensor and single-chip microcontroller
Signal input part connection；
Step 4, setting humidity control value and corrosive liquid temperature controlling value, starting single-chip computer control system start to test；
Formation of concrete test specimen is taken out after the time that step 5, test reach setting, observes surface crack and peeling conditions, is carried out
Compressive strength test；Then compressive strength test data and same period mark curing concrete intensity are compared, intensity can be calculated
Reduction coefficient, and then evaluate the corrosion resistance of concrete sample.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110501280A (en) * | 2019-08-30 | 2019-11-26 | 广东工业大学 | A kind of corrosion simulated device and method for prestressed stretch-draw anchorage |
| CN113740239A (en) * | 2021-09-07 | 2021-12-03 | 西安工业大学 | Concrete half-soaking chemical erosion durability test device |
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Application publication date: 20190531 |