CN206161487U - Survey device of concrete osmotic coefficient - Google Patents
Survey device of concrete osmotic coefficient Download PDFInfo
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- CN206161487U CN206161487U CN201621070657.6U CN201621070657U CN206161487U CN 206161487 U CN206161487 U CN 206161487U CN 201621070657 U CN201621070657 U CN 201621070657U CN 206161487 U CN206161487 U CN 206161487U
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- inner chamber
- container
- water storage
- storage container
- tank
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Abstract
The utility model discloses a survey device of concrete permeation coefficient, including holding water containing ware, elasticity container and basin, it has first inner chamber to hold the water containing utensil, and the lateral wall has first overflow mouth, the elasticity container has the second inner chamber that feeds through with first inner chamber, and the second import is suitable for sealedly and detachably sets up on the bottom of holding the water containing ware, the seal of wall outside the circumference of the inseparable test piece in the second inner chamber of pegging graft of its internal face conduct, the lateral wall of basin has a second overflow mouth, in the elasticity container inserts the basin, and has the flowing water clearance between the bottom surface of second export and basin. The survey device of this structure only needs to peg graft in the elasticity container sealing connection between the outer wall of the internal face of elasticity container and test piece with the test piece to can not block up the hole of test piece, the infiltrating area of test piece has the uniformity, holds solution in the water containing ware and can only follow inside the top of test piece flows in the test piece, flows through the bottom of test piece, thereby improves the accuracy of the test result of this survey device.
Description
Technical field
The utility model is related to detection technique field, and in particular to a kind of measure device of concrete filtration coefficient.
Background technology
Pervious concrete, as a kind of concrete of ecological, environmental protective, is the demand for meeting light-duty road surface, and pervious concrete is needed
Meet the requirement of certain resistance to compression, anti-folding and water permeability, wherein water permeability is most important index.Then need to permeable
The infiltration coefficient of concrete is tested, and is evaluated with the water permeability to concrete.
To the measure device of the infiltration coefficient of pervious concrete in prior art, its structure mainly includes vertically setting
The retaining cylinder put, retaining barrel top and bottom are respectively provided with opening, have the first overfall on the wall of side, are arranged on retaining cylinder
Metal sleeve on bottom, the internal diameter of metal sleeve is consistent with the internal diameter of retaining cylinder, by flange by the bottom of retaining cylinder
It is tightly connected with the top of metal sleeve；And tank, metal sleeve is put in tank, and the bottom of its lower surface and tank
Preset clearance between surface, opens up the second overfall on the side wall of tank, and for accepting the second overfall trickle
Graduated cylinder.
The measure device of said structure, when the coefficient of permeability to pervious concrete is tested, first to the peripheral outer wall of test specimen
Face arranges encapsulant, and such as paraffin adds rosin, cement plus butter or glass silica gel, water-repellent paint, sealing ring and sealing strip
Deng, will be provided with afterwards in the test specimen of encapsulant sealing loading metal sleeve, then retaining will be fixed at the top of metal sleeve
On the bottom of cylinder, then the assembly of retaining cylinder, metal sleeve and test specimen is put in tank, is injected into retaining cylinder
Water, now water can only downwards permeate from the top surface of test specimen, until the second overfall of tank there are flowing out, and cause retaining
Keep certain water level, after stable, with graduated cylinder the discharge of 5 minutes is accepted in cylinder, to calculate the coefficient of permeability of place's concrete.
But, the measure device of this structure, because pervious concrete is porous media, in its surrounding encapsulant is scribbled
Afterwards, encapsulant will necessarily be penetrated in the part endoporus of test specimen, will block the endoporus of this part, and the infiltrating area for causing test specimen becomes
It is little, in surrounding, sealing ring and sealing strip are set, always there are gap, test specimen permeable face in metal cylinder by external force compression seal local
Product does not have uniformity, and the result of test is inaccurate.
Utility model content
Therefore, technical problem to be solved in the utility model be it is of the prior art measure device test result not
Accurately.
For this purpose, the utility model provides a kind of measure device of concrete permeable coefficient, including
Water storage container, with first inner chamber, top and bottom have respectively the first import connected with the first inner chamber
And first outlet, side wall is with the first overfall；
Elastic container, top and bottom have respectively the second import and second outlet, with connecting with the first inner chamber
Second inner chamber, on the bottom that second import is suitable to seal and be removably disposed in the water storage container, inner wall surface thereof
As the seal in the peripheral outer wall face of the test specimen being closely plugged in the second inner chamber；
Tank, side wall has the second overfall, and the elastic container is inserted in the tank, and the second outlet and institute
State and have between the lower surface of tank flowing water gap.
Preferably, the measure device of above-mentioned concrete permeable coefficient, the elastic container be resilient sleeve, the elasticity
The tight of sleeve is socketed on the bottom outer wall face of the water storage container, and inner wall surface thereof is used as the seal.
It is further preferred that the measure device of above-mentioned concrete permeable coefficient, the resilient sleeve and the retaining are held
Device is cylindrical tube, and the diameter of the second inner chamber of the resilient sleeve is equal to the diameter of the first inner chamber of the water storage container.
Preferably, the measure device of above-mentioned concrete permeable coefficient, also including supporting construction, for supporting the retaining
Container, so that sealing is socketed in the elastic container on the water storage container bottom and inserts in the tank.
It is further preferred that the measure device of above-mentioned concrete permeable coefficient, the supporting construction includes support, fixed
On the basin sidewall, and upwardly extend；
Hold assembly, is slidably disposed on the support, and the water storage container is clamped by the hold assembly consolidates
Determine on the bracket.
More preferably preferably, the measure device of above-mentioned concrete permeable coefficient, the hold assembly be fixture, the fixture
One end have two clamping parts, the other end by keeper fixation on the bracket.
Preferably, the measure device of above-mentioned concrete permeable coefficient, also includes
First overflow pipe, is arranged at first overfall, for the solution in the water storage container to be discharged, not
Instill in the tank；And
Second overflow pipe, is arranged at second overfall；
Bearing container, is arranged on the lower section of the liquid outlet of second overflow pipe, for accepting the second overflow pipe stream
The solution for going out；
Flowmeter, is arranged in second overflow pipe, for measuring the amount of solution flowed out in second overflow pipe.
It is further preferred that the measure device of above-mentioned concrete permeable coefficient, also including solution supplying device, for Jing
First import is to offer solution in the water storage container.
It is further preferred that the measure device of above-mentioned concrete permeable coefficient, the width in the flowing water gap is 1 ㎜ -2
㎜。
The technical scheme that the utility model is provided, has the advantage that：
1. the utility model provide concrete permeable coefficient measure device, including water storage container, elastic container and
Tank, water storage container has first inner chamber, and there is respectively the first import and first connected with first inner chamber to go out for top and bottom
Mouthful, side wall has the first overfall；Elastic container top and bottom have respectively the second import and second outlet, with first
The second inner chamber of inner space, the second import is suitable to seal and be removably disposed on the bottom of water storage container, inner wall surface thereof
As the seal in the peripheral outer wall face of the test specimen being closely plugged in second inner chamber；The side wall of tank has the second overfall,
In elastic container insertion tank, and there is flowing water gap between the second outlet and the lower surface of tank.
The measure device of the concrete permeable coefficient of this structure, using elastic container metal of the prior art is directly replaced
Sleeve, the encapsulant being coated in test specimen surrounding outside wall surface, the sealing ring being placed in test specimen surrounding outside wall surface and sealing strip.
Only test specimen need to be plugged in elastic container, be tightly connected between the internal face of elastic container and the outside wall surface of test specimen, so as to not
The endoporus of test specimen can be blocked so that infiltrating area of the test specimen in elastic container has uniformity, the solution in water storage container is only
Can flow into inside test specimen from the top of test specimen, then the bottom of Jing test specimens is flowed out, and is entered in screw clamp finally by flowing water gap, from
And improve the accuracy of the test result of the measure device.
2. the measure device of the concrete permeable coefficient that the utility model is provided, elastic container is resilient sleeve, resilient sleeve
The tight of cylinder is socketed on the bottom outer wall face of the water storage container, and inner wall surface thereof is used as seal.Before test, only
Test specimen sealing need to be plugged in the inner chamber of resilient sleeve, the top of resilient sleeve is directly socketed in outside the bottom of water storage container
On wall；After test terminates, only resilient sleeve need to be dragged from the bottom of water storage container, be conveniently replaceable test specimen
When, the dismounting to resilient sleeve.
3. the utility model provide concrete permeable coefficient measure device, also including the first overflow pipe, the second overflow
Pipe, bearing container and flowmeter.First overflow pipe is arranged at the first overfall, for the solution in water storage container to be arranged
Go out, do not instill in tank；Overflow pipe is arranged at the second overfall；Bearing container is arranged on the liquid outlet of the second overflow pipe
Lower section, for accepting the solution that the second overflow pipe flows out；Flowmeter is arranged in overflow pipe, for measuring what is flowed out in overflow pipe
Amount of solution.When having solution to flow out in bearing container in the second overflow pipe in tank, directly can be measured by flowmeter
The flow of solution, is easy to subsequently calculate the coefficient of permeability of concrete sample.
Description of the drawings
In order to be illustrated more clearly that the utility model specific embodiment or technical scheme of the prior art, below will be right
The accompanying drawing to be used needed for specific embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
The structural representation of the measure device of the concrete permeable coefficient that Fig. 1 is provided for the utility model；
Description of reference numerals：1- water storage containers；The overflow pipes of 11- first；2- resilient sleeves；3- tanks；The overflows of 31- second
Pipe；4- flowing water gap；51- supports；52- fixtures；53- keepers；6- bearing containers；7- flowmeters；8- solution supplying devices；9-
Test specimen.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than the embodiment of whole.Based on the embodiment in the utility model, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
In description of the present utility model, it should be noted that term " " center ", " on ", D score, "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outward " is, based on orientation shown in the drawings or position relationship, to be only
For the ease of describe the utility model and simplify description, rather than indicate or imply indication device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
As long as additionally, technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of measure device of concrete permeable system, as shown in figure 1, including
Storage cylinder of water, is cylinder, and with first inner chamber, top and bottom have respectively the connected with the first inner chamber
One import and first outlet, side wall has the first overfall；
Resilient sleeve 2, is cylinder, and top and bottom have respectively the second import and second outlet, with first in
The second inner chamber of chamber connection, the diameter of second inner chamber and the equal diameters of first inner chamber, the top sealing of resilient sleeve 2 is socketed in
On the bottom outer wall face of cylindrical storage cylinder of water, peripheral outer wall of the inner wall surface thereof as the test specimen 9 being closely plugged in second inner chamber
The seal in face；
Tank 3, side wall has the second overfall；
Second overflow pipe 31, is arranged at the second overfall；
Bearing container 6, is arranged on the lower section of the liquid outlet of the second overflow pipe 31, for accepting what the second overflow pipe 31 flowed out
Solution；
Flowmeter 7, is arranged in overflow pipe, for measuring the amount of solution flowed out in overflow pipe；
Supporting construction includes support 51 and fixture 52, and support 51 is fixed on the side wall of tank 3, and is upwardly extended, fixture
52 one end have two clamping parts for being used to clamp storage cylinder of water, and the other end is slidably fixed to support 51 by keeper 53
On, so as to storage cylinder of water is fixed on support 51 so that sealing is socketed in the insertion tank 3 of the resilient sleeve 2 on storage cylinder of water bottom
It is interior, and cause that there is flowing water gap 4 between the second outlet and the lower surface of tank 3 of resilient sleeve 2, the flowing water gap 4
Width is 1mm；
First overflow pipe 11, is arranged at the first overfall, for the solution in the storage cylinder of water to be discharged, does not instill
In tank 3；
Water pump, for the first import described in Jing to providing solution in storage cylinder of water.
The measure device of the concrete permeable system of this structure, before the coefficient of permeability test to concrete sample 9, first
The sealing of cylinder specimen 9 is plugged in the second inner chamber of resilient sleeve 2, between the internal face of its outside wall surface and resilient sleeve 2
In the state of being tightly connected, that is, directly replacing metal sleeve of the prior art, being coated in the surrounding of test specimen 9 using resilient sleeve 2
Encapsulant in outside wall surface, the sealing ring being placed in test specimen surrounding outside wall surface and sealing strip, so as to test specimen 9 will not be blocked
Endoporus so that infiltrating area of the test specimen 9 in resilient sleeve 2 has uniformity, improves the standard of the measure device to test result
True property.The sealing of the top of resilient sleeve 2 is socketed on the bottom outer wall face of storage cylinder of water again, so as to by resilient sleeve 2 and test specimen 9
It is fixed on storage cylinder of water；Height and position of the fixture 52 on support 51 is now adjusted, storage cylinder of water is clamped in into the fixture of support 51
On 52, and fixed with keeper 53 so that the flowing water between the bottom second outlet of resilient sleeve 2 and the lower surface of tank 3
The width in gap 4 completes preparation for 1mm；Water pump is opened afterwards, and the imports of Jing first continually add molten into storage cylinder of water
Liquid, vertically can only penetrate into inside test specimen 9, then from the bottom of test specimen 9 into the solution in storage cylinder of water from the top of test specimen 9
Flow out, again Jing flowing water gap 4 enters in tank 3, with being continuously added for solution, the first overflow in storage cylinder of water this part solution
Mouthful and tank 3 in the second overfall have solution to flow out, and wait the second overflow in first overfall and tank 3 of storage cylinder of water
Mouthful streamflow it is stable after, be arranged in 7 start recording of flowmeter 5 minutes on the second overflow pipe 31, the second overflow pipe 31
The interior amount for flowing out solution；And the difference of water level in the water level and tank 3 of storage cylinder of water is measured, so as to calculate concrete sample 9
Coefficient of permeability.After having tested, only resilient sleeve 2 need to be removed from the bottom of storage cylinder of water, be conveniently replaceable test specimen 9.Meanwhile,
Flowmeter 7 is set on the second overflow pipe 31, is easy to record the flow of solution in the second overflow pipe 31 in time, further improving should
The detection accuracy of detection means.
Preferably, when storage cylinder of water is fixed on support, the link position of resilient sleeve 2 and storage cylinder of water bottom is preferably made
The top of the second overfall in tank 3, or concordantly, it is to avoid the top exterior walls face long period of soaking of resilient sleeve 2 is in tank 3
Solution in, reduce the sealing property connected between resilient sleeve 2 and storage cylinder of water.
Used as the alternative embodiments of the width of flowing water gap 4, the width in flowing water gap 4 can also be 1.5mm, or
1.3mm, 1.6mm, 1.8mm, 2mm, 2.3mm, 2.5mm, 2.8mm, 3mm etc., preferably by the width control system in flowing water gap 4 in 1-
Between 3mm.Used as deformation, the width in flowing water gap 4 can also be other distances, as long as meet the bottom of resilient sleeve 2 second going out
There is flowing water gap 4 between mouth and the lower surface of tank 3, it is concrete that width size is set, depending on specifically used situation.
As the alternative embodiments of water pump, can also be using other solution supplying device 8 in prior art come
To adding solution in storage cylinder of water.
Used as alternative embodiments, above-mentioned support container can for casing, tank 3, cylinder or others
Hold the container of solution.As deformation, can also be without arranging flowmeter 7, only bearing container 6 need to be set to graduated appearance
Device, such as graduated cylinder.
Used as the preferred of keeper 53, keeper 53 is screw, bolt or other connectors, need to only be fixed fixture 52
On support 51.To realize slidable connection mode of the fixture 52 on support 51, vertically, can be in support 51
On open up several installing holes, fixture 52 is arranged in the installing hole at differing heights adjusting flowing water gap 4 as needed
Width.
Preferably, above-mentioned fixture 52 can be arbitrary fixture 52 of the prior art, only above-mentioned functions need to be realized i.e.
Can.Used as deformation, fixture 52 may be replaced with hold assembly of the prior art, and for example, manipulator only need to be by storage cylinder of water
It is clamped on support 51.
Used as the deformation of supporting construction, supporting construction can also be other structures of the prior art, only need to support retaining
Cylinder so that be sealedly connected on resilient sleeve 2 on the bottom of storage cylinder of water and stretch in tank 3, bottom and the tank 3 of resilient sleeve 2
Flowing water gap 4 is formed between lower surface.
For example, supporting network is set on the bottom interior surface of tank 3, by the bracing frame that is obliquely installed by storage cylinder of water and bullet
Property sleeve 2 is fixed on supporting network, and the height of supporting network is just as the flowing water gap 4 between resilient sleeve 2 and the bottom of tank 3.
Used as deformation, the second inner chamber of resilient sleeve 2 can also be without equal, example with the diameter of the first inner chamber of storage cylinder of water
Such as, the diameter of the second inner chamber of resilient sleeve 2 less than first inner chamber diameter, or second inner chamber with diameter greater than first inner chamber
Diameter, but need to ensure the elastic sufficiently large of resilient sleeve 2, seal when being socketed on storage cylinder of water bottom, will not be from storage cylinder of water
On split away off.
As deformation, resilient sleeve 2 and storage cylinder of water shape in addition to for cylindrical tube, can also be other shapes, example
Such as square tube, triangle cylinder, or other erose cylinders.
Used as deformation, resilient sleeve 2 can be fixed on the bottom of storage cylinder of water with sealing by socket mode, can also be adopted
Other modes that are detachable and being tightly connected, are conveniently replaceable test specimen 9.
Used as deformation, storage cylinder of water can also be the water storage container 1 of other structures, and resilient sleeve 2 can also be other bullets
Property container, on the bottom for only needing to be suitable at the top of elastic container to seal and be removably disposed in water storage container 1, elastic container
Seal of the internal face as the peripheral outer wall face of the test specimen 9 being closely plugged in second inner chamber.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Among changing the protection domain created still in the utility model.
Claims (9)
1. a kind of measure device of concrete permeable coefficient, it is characterised in that include
Water storage container (1), with first inner chamber, top and bottom have respectively the first import for connecting with the first inner chamber and
First outlet, side wall has the first overfall；
Elastic container, top and bottom have respectively the second import and second outlet, with the connected with the first inner chamber
Two inner chambers, on the bottom that second import is suitable to seal and be removably disposed in the water storage container (1), inner wall surface thereof is made
The seal in the peripheral outer wall face of the test specimen (9) in be closely plugged on the second inner chamber；
Tank (3), side wall has the second overfall, and the elastic container is inserted in the tank (3), and the second outlet with
There are flowing water gap (4) between the lower surface of the tank (3).
2. the measure device of concrete permeable coefficient according to claim 1, it is characterised in that：The elastic container is bullet
Property sleeve (2), the tight of the resilient sleeve (2) is socketed on the bottom outer wall face of the water storage container (1), its inwall
Face is used as the seal.
3. the measure device of concrete permeable coefficient according to claim 2, it is characterised in that：The resilient sleeve (2)
Cylindrical tube is with the water storage container (1), the diameter of the second inner chamber of the resilient sleeve (2) is equal to the water storage container
(1) diameter of first inner chamber.
4. the measure device of the concrete permeable coefficient according to any one of claim 1-3, it is characterised in that：Also include
Supporting construction, for supporting the water storage container (1), so that sealing is socketed in the elasticity on the water storage container (1) bottom
Container is inserted in the tank (3).
5. the measure device of concrete permeable coefficient according to claim 4, it is characterised in that：The supporting construction includes
Support (51), is fixed on the wall of the tank (3) side, and upwardly extends；
Hold assembly, is slidably disposed on the support (51), the water storage container (1) clamped by the hold assembly and
It is fixed on the support (51).
6. the measure device of concrete permeable coefficient according to claim 5, it is characterised in that：The hold assembly is folder
Tool (52), one end of the fixture (52) has two clamping parts, and the other end is fixed on the support by keeper (53)
(51) on.
7. the measure device of the concrete permeable coefficient according to any one of claim 1-3, it is characterised in that：Also include
First overflow pipe (11), is arranged at first overfall, for the solution in the water storage container (1) to be discharged,
Do not instill in the tank (3)；And
Second overflow pipe (31), is arranged at second overfall；
Bearing container (6), is arranged on the lower section of the liquid outlet of second overflow pipe (31), for accepting second overflow pipe
(31) solution for flowing out；
Flowmeter (7), is arranged in second overflow pipe (31), for measuring the molten of the interior outflow of second overflow pipe (31)
Liquid measure.
8. the measure device of concrete permeable coefficient according to claim 7, it is characterised in that：Also include solution supply dress
(8) are put, for the first import described in Jing to offer solution in the water storage container (1).
9. the measure device of the concrete permeable coefficient according to any one of claim 1-3, it is characterised in that：The stream
The width of water space (4) is 1 ㎜ -2 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621070657.6U CN206161487U (en) | 2016-09-21 | 2016-09-21 | Survey device of concrete osmotic coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621070657.6U CN206161487U (en) | 2016-09-21 | 2016-09-21 | Survey device of concrete osmotic coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206161487U true CN206161487U (en) | 2017-05-10 |
Family
ID=58651190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621070657.6U Expired - Fee Related CN206161487U (en) | 2016-09-21 | 2016-09-21 | Survey device of concrete osmotic coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206161487U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677585A (en) * | 2017-11-10 | 2018-02-09 | 北京耐尔得仪器设备有限公司 | The device for determining permeation coefficient and measuring method of a kind of seepy material |
| CN107703046A (en) * | 2017-11-09 | 2018-02-16 | 建筑材料工业技术情报研究所 | Concrete permeable coefficient measuring instrument and assay method |
| CN109900615A (en) * | 2019-03-13 | 2019-06-18 | 镇江市建设工程质量检测中心有限公司 | Soil permeability coefficient test device and its test method |
| CN111595748A (en) * | 2020-05-20 | 2020-08-28 | 武汉大学 | Automatic testing device and testing method for concrete permeability coefficient |
| CN109900615B (en) * | 2019-03-13 | 2024-04-26 | 镇江市建设工程质量检测中心有限公司 | Soil permeability coefficient testing device and testing method thereof |
-
2016
- 2016-09-21 CN CN201621070657.6U patent/CN206161487U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703046A (en) * | 2017-11-09 | 2018-02-16 | 建筑材料工业技术情报研究所 | Concrete permeable coefficient measuring instrument and assay method |
| CN107703046B (en) * | 2017-11-09 | 2023-12-12 | 建筑材料工业技术情报研究所 | Concrete water permeability coefficient tester and testing method |
| CN107677585A (en) * | 2017-11-10 | 2018-02-09 | 北京耐尔得仪器设备有限公司 | The device for determining permeation coefficient and measuring method of a kind of seepy material |
| CN107677585B (en) * | 2017-11-10 | 2024-01-09 | 北京耐尔得仪器设备有限公司 | Device and method for measuring water permeability coefficient of water permeable material |
| CN109900615A (en) * | 2019-03-13 | 2019-06-18 | 镇江市建设工程质量检测中心有限公司 | Soil permeability coefficient test device and its test method |
| CN109900615B (en) * | 2019-03-13 | 2024-04-26 | 镇江市建设工程质量检测中心有限公司 | Soil permeability coefficient testing device and testing method thereof |
| CN111595748A (en) * | 2020-05-20 | 2020-08-28 | 武汉大学 | Automatic testing device and testing method for concrete permeability coefficient |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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