CN110441217B - Penetration unit of concrete test block and tester with penetration unit - Google Patents
Penetration unit of concrete test block and tester with penetration unit Download PDFInfo
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- CN110441217B CN110441217B CN201910814227.2A CN201910814227A CN110441217B CN 110441217 B CN110441217 B CN 110441217B CN 201910814227 A CN201910814227 A CN 201910814227A CN 110441217 B CN110441217 B CN 110441217B
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- air seal
- concrete test
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- test block
- unit
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 230000035515 penetration Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000741 silica gel Substances 0.000 claims abstract description 11
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims abstract description 6
- 230000008595 infiltration Effects 0.000 claims description 11
- 238000001764 infiltration Methods 0.000 claims description 11
- 239000002356 single layer Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 9
- 230000005587 bubbling Effects 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 description 20
- 238000005259 measurement Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Examining Or Testing Airtightness (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a penetration unit of a concrete test block, which comprises an air seal base, an air seal middle section and an air seal top cover, wherein the air seal base is provided with a penetration unit air inlet, the air seal middle section is provided with a sleeving part and is provided with a pressure stabilizing air inlet and an annular groove which are communicated with each other, a rubber oil bag is sleeved on the sleeving part, the top of the air seal top cover is provided with a sinking groove, the side part of the air seal top cover is provided with a penetration unit air outlet, a perspective panel is arranged at the sinking groove and sealed, the outer side of a concrete test piece is sleeved with a silica gel sleeve and then is arranged in the middle part of the rubber oil bag, and a water bath interlayer is formed between the concrete test piece and the perspective panel after the pressure stabilizing air inlet is used for air intake; the utility model also provides a tester for the concrete test block, which comprises a penetration unit; by arranging the water bath interlayer and the perspective panel, the circumferential surface of the concrete test block can be ensured to realize full sealing by observing bubbling conditions; meanwhile, the permeation unit is placed in the water tank of the tester, so that the air tightness of the permeation unit is ensured.
Description
Technical Field
The utility model relates to the technical field of concrete gas permeability measurement, in particular to a permeation unit of a concrete test block and a tester with the permeation unit.
Background
Concrete, also called concrete, is a porous material for construction, the existence of pores strongly affects the strength, toughness and other properties thereof, and the pore structure inside the concrete is closely related to the performances in terms of permeability, air tightness, corrosion resistance and other durability thereof. In evaluating the performance of concrete, permeability is an important index, which refers to the difficulty of permeation, diffusion or migration in concrete when gas, liquid or ions are subjected to pressure, chemical potential or electric field. The concrete permeability and the durability are closely related, the research on the concrete permeability is developed, the concrete permeability is certainly an indispensable component part in the durability research, and the concrete permeability evaluation method has important practical significance on the design of high-durability concrete. Permeability is one of the main indicators of concrete durability, and currently, class 2 permeable media, water and gas, are mainly used in determining this property. When water is used as a permeation medium, the permeation process is difficult to reach a steady state due to continuous hydration of cement, migration of substances, change of a capillary structure and the like, so that the permeation coefficient of water is difficult to measure accurately, and the research is gradually changed to a test method using gas as the permeation medium. The utility model patent with the authority of CN201583477U discloses a concrete gas permeability test system, the gas permeability device in the technical scheme of the patent can stabilize the pressure on the circumferential surface of a concrete test piece, the measurement is accurate, the gas permeability test system is now incorporated into the relevant national standard (GB 36900.2-2018), in the measurement process of the gas permeability, whether the circumferential surface of the concrete test piece (in a round cake shape) is completely sealed is very critical, if the circumferential surface of the concrete test piece is not completely sealed, the gas part overflows from between the concrete test piece and a rubber sleeve rather than from the hole of the concrete test piece, the measurement result can generate great deviation, and in the experiment, the concrete test piece cannot be completely sealed.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a test unit of a concrete test block and a tester with the test unit.
In order to achieve the above purpose, in one aspect, the utility model provides a penetration unit of a concrete test block, which comprises an air seal base, an air seal middle section and an air seal top cover which are fixedly connected by a first screw, wherein the middle part of the air seal base is provided with a penetration unit air inlet, the air seal middle section is annular, the inner wall surface of the air seal middle section protrudes inwards to form a sleeving part, an annular groove is processed on the sleeving part, the air seal middle section is provided with a pressure stabilizing air inlet at the side part, the annular groove is communicated with the pressure stabilizing air inlet, a rubber oil bag is sleeved on the sleeving part in a clamping manner, the rubber oil bag enables the air seal middle section to be connected with the air seal base and the air seal top cover in an airtight manner, under the locking effect of the first screw, the rubber oil bag is airtight with the air seal middle section, the air seal top cover is provided with a sinking groove at the top, the air seal top cover is provided with a penetration unit air outlet at the side part, a perspective panel is provided with an O-shaped sealing ring through a second screw, the sinking test piece is sleeved on the outer side of the round test piece, and after the rubber bag is sleeved on the middle part of the air seal is formed into the air bath;
when the concrete test block is placed in the middle of the rubber oil bag to carry out permeability experiments, the bubbling condition of the water bath interlayer can be observed by the perspective panel to obtain whether the concrete test block realizes complete sealing.
Preferably, the air seal base is screwed with a bolt, and the air seal base forms conical surfaces towards two sides at the upper part of the air inlet of the permeation unit;
in the technical scheme, the bolts on the air seal base are used for heightening and supporting the permeation unit, and the conical surface can enable high-pressure gas at the air inlet of the permeation unit to diffuse and be uniformly distributed on the concrete test block.
Preferably, the rubber oil bag is a single-layer rubber skin;
in the technical scheme, the single-layer rubber oil bag replaces the inflatable rubber bag in the prior art, and the rubber oil bag has the advantages of simple processing, low cost, reliable use and long service life.
Preferably, the air seal top cover is also provided with an eye bolt;
in the technical scheme, the lifting bolt is convenient for lifting the penetration unit, and labor is saved in assembly.
Preferably, spring washers are arranged at the first screw and the second screw;
in the technical scheme, the spring washer has a retaining function, so that the connection of the air seal base, the air seal middle section and the air seal top cover is very tight, the connection of the perspective panel and the air seal top cover is tight, and the air tightness of the permeation unit is good.
Preferably, the height values of the concrete test piece, the silica gel sleeve and the rubber oil bag are matched, and the outer diameter of the concrete test piece after being sleeved with the silica gel sleeve is smaller than the inner diameter of the rubber oil bag;
in the technical scheme, after the concrete test piece is sleeved with the silica gel sleeve, the outer diameter is smaller than the inner diameter of the rubber oil bag, so that the middle part of the rubber oil bag can be conveniently filled.
In another aspect, the present utility model provides a concrete test block meter comprising a penetration unit;
when the tester containing the permeation unit is used for measuring the permeability, the perspective panel of the permeation unit can be observed in real time, so that the circumferential surface of the concrete test block is always fully sealed.
Preferably, the number of the infiltration units is three, and the infiltration units are completely immersed in a water tank of the tester when in operation;
in the technical scheme, the tester can test three concrete test blocks simultaneously, the efficiency is high, the data are comparably, and meanwhile, the permeation unit is placed in a water bath environment, and the air tightness problem between the air seal base, the air seal middle section and the air seal top cover and the air tightness problem between the perspective panel and the air seal top cover can be eliminated through air bubbles.
Compared with the prior art, the utility model has the beneficial effects that: in the prior art, when the permeability test of the concrete test block is performed, the complete sealing on the circumference of the concrete test block cannot be ensured; meanwhile, the permeation unit is placed in the water tank of the tester, so that the air tightness of the permeation unit is ensured.
Drawings
FIG. 1 is a front view of a permeation unit according to the present utility model;
FIG. 2 is a top view of a permeation cell according to the present utility model;
FIG. 3 is a cross-sectional view of the position A-A of FIG. 1;
FIG. 4 is a cross-sectional view of the B-B position of FIG. 2;
FIG. 5 is a perspective view of a permeation unit according to the present utility model;
fig. 6 is a perspective view of the measuring instrument according to the present utility model.
In the figure: 1. an eye bolt; 2. a second screw; 3. a perspective panel; 4. an O-shaped sealing ring; 5. an air seal top cover; 51. a permeate unit gas outlet; 6. water bath interlayer; 7. a rubber oil bag; 8. a silica gel sleeve; 9. a gas seal middle section; 91. a sleeve part; 911. a ring groove; 92. a pressure stabilizing air inlet; 10. a concrete test piece; 11. an air seal base; 111. a permeation cell inlet; 12. a first screw; 13. a bolt; 14. a water tank.
Detailed Description
As shown in fig. 1, 3 and 4, an aspect of the embodiment of the present utility model provides a test unit for a concrete test block, which includes an air seal base 11, an air seal middle section 9 and an air seal top cover 5 fixedly connected by a first screw 12, wherein a penetration unit air inlet 111 is opened in the middle of the air seal base 11, a bolt 13 is screwed on the air seal base 11, and the air seal base 11 forms a conical surface from the upper part of the penetration unit air inlet 111 to two sides; the air seal middle section 9 is annular, the inner wall surface of the air seal middle section 9 protrudes inwards to form a sleeving part 91, an annular groove 911 is formed in the sleeving part 91, a pressure stabilizing air inlet 92 is formed in the side part of the air seal middle section 9, the annular groove 911 is communicated with the pressure stabilizing air inlet 92, the rubber oil bag 7 is a single-layer rubber skin, the rubber oil bag 7 is sleeved on the sleeving part 91 in a clamping manner up and down, the rubber oil bag 7 enables the connection between the air seal middle section 9 and the air seal base 11 as well as the air seal top cover 5 to be airtight, under the locking effect of a first screw 12, the air seal middle section 9 and the rubber oil bag 7 are airtight, the air seal top cover 5 is provided with a lifting bolt 1, the air seal top cover 5 is provided with a sinking groove at the top, the air seal top cover 5 is provided with a permeation unit air outlet 51 at the side part, the perspective panel 3 is arranged at the sinking groove through a second screw 2 and is provided with an O-shaped sealing ring 4, the middle part of the rubber oil bag 7 is sleeved on the outer side of the round concrete test piece 10 after the pressure stabilizing air inlet 92, and a water bath sandwich 6 is formed between the test piece 10 and the panel 3 after the pressure stabilizing air inlet 92 is filled; spring washers are arranged at the first screw 12 and the second screw 2; the height values of the concrete test piece 10, the silica gel sleeve 8 and the rubber oil bag 7 are matched, and the outer diameter of the concrete test piece 10 after being sleeved with the silica gel sleeve 8 is smaller than the inner diameter of the rubber oil bag 7.
As shown in fig. 6, another aspect of the embodiment of the present utility model provides a concrete test block tester, which includes three infiltration units, and the infiltration units are completely immersed in a water tank of the tester when in operation.
In the prior art, when the permeability test of the concrete test block is performed, the complete sealing on the circumference of the concrete test block cannot be ensured; meanwhile, the permeation unit is placed in the water tank of the tester, so that the air tightness of the permeation unit is ensured.
When in specific use, the utility model is described with reference to the drawings for convenient understanding;
referring to fig. 3 and 4, a rubber oil bag is sleeved on a sleeved part of an air seal middle section, the rubber oil bag is tightly attached to an inner wall surface of the sleeved part due to elastic shrinkage, a first screw is used for fixedly connecting an air seal base with the air seal middle section, a cavity for storing a concrete test block is formed by the air seal base and the air seal middle section, a round cake-shaped concrete test block is sleeved with a layer of silica gel sleeve on the outer side, a gap is filled in the cavity, then the air seal top cover is fixedly connected with the air seal middle section through the first screw, the connection part of the air seal middle section, the air seal top cover and the air seal base is airtight through the rubber oil bag, a pressure stabilizing air inlet is filled with compressed gas, the rubber oil bag is tightly pressed with the silica gel sleeve at the annular groove to realize annular sealing of a concrete test piece, after a proper amount of water bath interlayer is added, a perspective panel is locked on the air seal top cover (provided with an O-shaped sealing ring) through a second screw, after the air permeability test can be carried out, after the air permeability of a permeation unit is diffused through gas, the air permeation hole of the permeation unit is filled with air, and gas is discharged from a gas permeation unit through a pore to an air outlet, and the gas permeation meter is used for measuring the gas permeability and calculating data;
if the circumference of the concrete test block is not completely sealed, bubbles can be seen to emerge on the circumference of the water bath layer, if the air tightness of the air seal top cover, the air seal middle section and the air seal base is poor, the surface bubbles of the permeation unit can be seen to overflow when the permeation unit is arranged in the water tank, and the gas permeability test can be completed under the high-tightness condition through direct observation of the bubbles, so that the test result is accurate and reliable.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. A penetration unit of a concrete test block is characterized in that: the air seal device comprises an air seal base (11), an air seal middle section (9) and an air seal top cover (5) which are fixedly connected by a first screw (12), wherein the middle part of the air seal base (11) is provided with a permeation unit air inlet (111), the air seal middle section (9) is annular, the inner wall surface of the air seal middle section protrudes inwards to form a sleeve part (91), an annular groove (911) is formed in the sleeve part (91), the side part of the air seal middle section (9) is provided with a pressure stabilizing air inlet (92), the annular groove (911) is communicated with the pressure stabilizing air inlet (92), a rubber oil bag (7) is sleeved on the sleeve part (91) in a clamping manner, the rubber oil bag (7) enables the air seal middle section (9) to be connected with the air seal base (11) in an airtight manner, the rubber oil bag (7) and the air seal top cover (5) to be airtight under the locking effect of the first screw (12), the air seal middle section (7) and the air seal top cover (9) are provided with a pressure stabilizing air inlet (92) at the side part, the top cover (5) is provided with a rubber seal top cover (4) at the middle part (4) and an air outlet (4) is sleeved on the air seal ring (4) through a perspective way, after the pressure stabilizing air inlet (92) is used for air intake, a water bath interlayer (6) is formed between the concrete test piece (10) and the perspective panel (3).
2. The infiltration unit of a concrete test block according to claim 1, wherein: the air seal base (11) is screwed with bolts (13), and the air seal base (11) forms conical surfaces towards two sides at the upper part of the air inlet (111) of the permeation unit.
3. The infiltration unit of a concrete test block according to claim 1, wherein: the rubber oil bag (7) is a single-layer rubber skin.
4. The infiltration unit of a concrete test block according to claim 1, wherein: and the air seal top cover (5) is also provided with an eye bolt (1).
5. The infiltration unit of a concrete test block according to claim 1, wherein: the first screw (12) and the second screw (2) are respectively provided with a spring washer.
6. The infiltration unit of a concrete test block according to claim 1, wherein: the height values of the concrete test piece (10), the silica gel sleeve (8) and the rubber oil bag (7) are matched, and the outer diameter of the concrete test piece (10) is smaller than the inner diameter of the rubber oil bag (7) after the concrete test piece (10) is sleeved with the silica gel sleeve (8).
7. A concrete test block tester is characterized in that: a permeation unit according to any one of claims 1 to 6.
8. The meter of claim 7, wherein: the number of the infiltration units is three, and the infiltration units are completely immersed in a water tank (14) of the tester when in operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910814227.2A CN110441217B (en) | 2019-08-30 | 2019-08-30 | Penetration unit of concrete test block and tester with penetration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910814227.2A CN110441217B (en) | 2019-08-30 | 2019-08-30 | Penetration unit of concrete test block and tester with penetration unit |
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| Publication Number | Publication Date |
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| CN110441217A CN110441217A (en) | 2019-11-12 |
| CN110441217B true CN110441217B (en) | 2023-06-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3312729A1 (en) * | 1983-04-08 | 1984-10-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Method and measurement chamber for determining the pore diameter of micro- and ultrafiltration membranes |
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| CN104458533A (en) * | 2014-12-05 | 2015-03-25 | 南京市建筑安装工程质量检测中心 | Flexible wall permeameter and use method thereof |
| CN107192653A (en) * | 2017-07-04 | 2017-09-22 | 福州大学 | The test device and test method of underground water seal cave depot rock mass water sealing condition |
| CN109932298A (en) * | 2019-03-08 | 2019-06-25 | 山东科技大学 | Micro-flows visual testing device and method under a kind of coupling |
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| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| KR101431431B1 (en) * | 2011-08-31 | 2014-08-18 | 미쯔비시 레이온 가부시끼가이샤 | Method of inspecting hollow fiber membrane module and apparatus for inspecting hollow fiber membrane module |
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| CN109238944A (en) * | 2018-10-31 | 2019-01-18 | 迈博瑞生物膜技术（南通）有限公司 | The device and method of portable manual pressure test syringe needle filter bubble point value |
| CN109916801A (en) * | 2019-04-18 | 2019-06-21 | 西南石油大学 | A kind of carbon dioxide foaming drive microscopic seepage experimental method |
| CN210571878U (en) * | 2019-08-30 | 2020-05-19 | 舟山市博远科技开发有限公司 | Infiltration unit of concrete test block and tester with same |
-
2019
- 2019-08-30 CN CN201910814227.2A patent/CN110441217B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3312729A1 (en) * | 1983-04-08 | 1984-10-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Method and measurement chamber for determining the pore diameter of micro- and ultrafiltration membranes |
| JP2012148218A (en) * | 2011-01-17 | 2012-08-09 | Sekisui Chem Co Ltd | Leakage inspection method for hollow fiber membrane module |
| CN104458533A (en) * | 2014-12-05 | 2015-03-25 | 南京市建筑安装工程质量检测中心 | Flexible wall permeameter and use method thereof |
| CN107192653A (en) * | 2017-07-04 | 2017-09-22 | 福州大学 | The test device and test method of underground water seal cave depot rock mass water sealing condition |
| CN109932298A (en) * | 2019-03-08 | 2019-06-25 | 山东科技大学 | Micro-flows visual testing device and method under a kind of coupling |
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| CN110441217A (en) | 2019-11-12 |
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