CN106706500A - Device for determining permeability of concrete - Google Patents
Device for determining permeability of concrete Download PDFInfo
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- CN106706500A CN106706500A CN201710043510.0A CN201710043510A CN106706500A CN 106706500 A CN106706500 A CN 106706500A CN 201710043510 A CN201710043510 A CN 201710043510A CN 106706500 A CN106706500 A CN 106706500A
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- 230000035699 permeability Effects 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 23
- 238000001764 infiltration Methods 0.000 claims description 21
- 230000008595 infiltration Effects 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 241000446313 Lamella Species 0.000 claims 1
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
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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)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a device for determining permeability of concrete. The device comprises a sample holder for fixing a concrete sample, wherein the sample holder can seal the side wall of the concrete sample. The device also comprises a water seepage funnel, a measuring pipe, a pressurization tank and a water storage tank which communicate with each other sequentially through pipelines, wherein the water seepage funnel is connected to one end of the sample holder in a sealed and detachable manner; the measuring pipe is vertically arranged; a first electric control valve is mounted on the pipeline communicating the pressurization tank and the water storage tank; the upper ends of the pressurization tank and the water storage tank communicate with a first compressed air pipe; a first pressure control valve is mounted on the first compressed air pipe; and a liquidometer is mounted on the measuring pipe. The invention aims to provide a device for determining permeability of concrete, in order to solve the problems that the existing concrete permeability detection device is complicated and the detection method is complex in operation and low in precision.
Description
Technical field
The present invention relates to a kind of device for determining concrete permeability.
Background technology
When the performance of concrete is evaluated, permeability is an important indicator, and it refers to that gas, liquid or ion are pressurized
Power, chemical potential or electric field action, the complexity permeated in concrete, spread or migrated.Concrete permeability with it is durable
Property between have a close relationship, carry out the research to concrete permeability, indispensable composition in undoubtedly durable Journal of Sex Research
Part, also has important practical significance to the evaluation of concrete durability with the design of high durability concrete.
At present the country have various to method of testing permeability of concrete, it is common to use seepage-resistant grade methods and resultses it is true
It is real, reliable, but because cement-base composite material often has preferable anti-permeability performance, therefore the experimental technique cycle is long, efficiency
It is very low, and the test method water pressure changes over time, it is difficult to by flow-rate ratio compared with infiltration coefficient.Using gas osmosis,
It is quick and precision is higher, but requirement to sample pretreating is higher, after heating particularly with the concrete sample for mixing mixing material,
The intensity of concrete has different degrees of raising, and pore structure may have occurred large change, it is impossible to ensure the true of test result
Property.
The content of the invention
It is an object of the invention to a kind of device for determining concrete permeability, to solve to detect concrete permeability at present
Device is complicated, the problem that detection method is cumbersome and precision is inadequate.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of device for determining concrete permeability, bag
The specimen mounting for fixing concrete test specimen is included, and specimen mounting can seal the side wall of concrete sample, also including leading to successively
Infiltration funnel, measurement pipe, pressurized tank and storage tank that piping is connected, infiltration funnel are sealed, detachable connection in examination
Sample rack one end, measurement pipe arranges vertically, is provided with the first electrically-controlled valve on the pipeline that pressurized tank is connected with storage tank, pressurized tank and
Storage tank upper end is communicated with the first compressed air hose, and first pressure control valve is provided with the first compressed air hose, is surveying
Liquid level gauge is installed on buret.
The specimen mounting includes the sleeve pipe being enclosed within outside concrete sample, the ring set being enclosed within outside sleeve pipe and is separately positioned on coagulation
Two pieces of annular pressing plates of native test specimen two ends, two block pressur plates extend coagulation by many screw rod detachable connections, sleeve pipe two ends
The termination of native test specimen is compacted between pressing plate and concrete sample or between pressing plate and ring set, is adopted between pressing plate and the ring set
With being tightly connected, by being separated out pressure water cavity between ring set and sleeve pipe, water inlet pipe is communicated with ring set lower end, ring set upper end is provided with exhaust
Pipe, water inlet pipe is connected with a compressed water generation apparatus, and sealing bolt is provided with blast pipe, and it is latex film that described sleeve pipe is made of, institute
Infiltration funnel is stated to be sealedly connected on pressing plate by screw.
Ring set two ends have ring flat-plate, and a circle annular protrusion is provided with ring flat-plate, a ring shape is provided with pressing plate end face and is cut
Groove, is provided with sealing ring in grooving, and when two block pressur plates are close to each other, the protrusion can be plugged into grooving, and be pressed on
On sealing ring.
The compressed water generation apparatus include water tank, and the connection of water inlet pipe one end connects in the bottom of water tank in water tank upper surface
The second compressed air hose is connected with, second pressure control valve, pressure sensor and the second electricity are installed on the second compressed air hose
Control valve.
The liquid level is calculated as differential pressure levelmeter, and the signal transmission that differential pressure levelmeter and pressure sensor will be detected is to calculating
Machine, the electrically-controlled valve of computer controls first and the second electrically-controlled valve are opened and closed.
A kind of method for testing concrete filtration coefficient, comprises the following steps：
The first step：Concrete sample is installed in specimen mounting water is circulated into water tank, entered hydraulic pressure by compressed air
To in pressure water cavity, allow water to cover blast pipe, then sealing bolt is tightened onto on blast pipe；
Second step：Persistently compressed air is pressed into water tank, allows sleeve pipe to be close to concrete around concrete sample, incited somebody to action
Concrete sample side wall is sealed；
3rd step：Water is circulated into storage tank, the first electrically-controlled valve is opened, after water enters into infiltration funnel and measurement pipe, the
One electrically-controlled valve is closed；
4th step：Compressed air is filled into storage tank and pressurized tank, the water level in measurement pipe permeates slowly with concrete
Decline, during decline, the difference in height of differential pressure levelmeter real-time monitoring liquid level, computer converses measurement velocity in pipes
V1, it is known that atmospheric pressure P, concrete sample length L, measurement pipe（5）Sectional area A1 and concrete sample sectional area A2, can be led to
Cross the flow velocity v2 of concrete sample；The coefficient of permeability K of sample is calculated by Darcy's law again, computing formula is：K=v2*L/P.
, it is necessary to check the close of pressure water cavity before above-mentioned second step is carried out in a kind of method for testing concrete filtration coefficient
Feng Xing, inspection method is：Continue to be pressed into compressed air in water tank, the air pressure in pressure sensor monitoring to water tank
When reaching the preset pressure of second pressure control valve, the electrically-controlled valve of computer controls second is closed, and allows water tank pressurize for a period of time,
Pressure value in then pressure sensor detection water tank, if pressure sensor detects pressure value in water tank and pressed less than second
Force control valve preset value, then represent and press water cavities seals not tight, there is leak, it is necessary to exclude leakage point, until pressure water cavity is complete
It is hermetically sealed.
A kind of method for testing concrete filtration coefficient also includes the 5th step：The default measurement pipe bound head liquid of computer
Position, when head is less than bottom limit level, the electrically-controlled valve of computer controls first is opened, and allows water level to rise, when water level rises to head
During upper limit level, the electrically-controlled valve of computer controls first is closed, and realizes automatic watering.
Beneficial effects of the present invention are：The present invention can easily measure the infiltration coefficient of concrete sample, in test
When, good sealing can be carried out to concrete side wall, it is ensured that the accuracy of measurement, being capable of monitor in real time by differential pressure levelmeter
Infiltration situation, obtains the infiltration coefficient in random time section, and automatic watering in testing tube is realized by automatically controlling, can be continuous
Pressurization water test is carried out, is more facilitated using operation, by controlling the applying size of atmospheric pressure, concrete sample can entered
Measured under row multiple barometric gradient, increase the reliability of result of the test, can more accurately test seepage velocity, improve and ooze
The measuring accuracy of saturating coefficient.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is main structure diagram of the invention,
Fig. 2 is the main structure diagram on specimen mounting of the invention,
Fig. 3 is the partial enlargement structural representation at A in Fig. 2.
In figure：Concrete sample 1, specimen mounting 2, storage tank 3, pressurized tank 4, measurement pipe 5, water tank 6, infiltration funnel 7, close
Seal 25, the first electrically-controlled valve 301, liquid level gauge 8, sleeve pipe 21, ring set 22, pressing plate 24, screw rod 241, pressure water cavity 23, water inlet pipe
202nd, blast pipe 201, sealing bolt 27, ring flat-plate 222, raised 221, sealing ring 25, water inlet pipe 202, the second compressed air hose 92,
Second pressure control valve 102, pressure sensor 10, the second electrically-controlled valve 302.
Specific embodiment
As shown in Fig. 1 to 3, a kind of device for determining concrete permeability, including for the sample of fixing concrete test specimen
Frame 2, and specimen mounting 2 can be by the sealing of the side wall of concrete sample, also including passing sequentially through the infiltration funnel 7 of pipeline communication, surveying
Buret 5, pressurized tank 4 and storage tank 3, infiltration funnel 7 are arranged on the one end of specimen mounting 2 by screw, in infiltration funnel 7 and specimen mounting
Sealed using sealing ring 25 between 2, measurement pipe 5 is arranged vertically, the is provided with the pipeline that pressurized tank 4 is connected with storage tank 3
One electrically-controlled valve 301, pressurized tank 4 and the upper end of storage tank 3 are communicated with the first compressed air hose 91, on the first compressed air hose 91
First pressure control valve 101 is installed, liquid level gauge 8 is installed in measurement pipe 5.
When in use, the first magnetic valve 301 is first turned on, the water in storage tank 3 is circulated into pressurized tank 4, and along measurement
Pipe 5 and pipeline make infiltration funnel 7 hydraulically full.Water is pushed in concrete sample by compressed air then and is permeated, because
It is that water is promoted by air pressure, it can be ensured that water is continual and steady entering into concrete sample, it is ensured that the standard of result of the test
True property, can be the automatic watering of measurement pipe 5 when the liquid level of measurement pipe 5 is too low by the first electrically-controlled valve 301, it is ensured that experiment continues
Carry out so that operation more facilitates.
The specimen mounting 2 includes the sleeve pipe 21 being enclosed within outside concrete sample, the ring set 22 being enclosed within outside sleeve pipe 21 and sets respectively
Two pieces of annular pressing plates 24 at concrete sample two ends are put, two block pressur plates 24 are by many detachable connections of screw rod 241, sleeve pipe
The termination 211 that concrete sample is extended at 21 two ends is compacted between pressing plate 24 and concrete sample or pressing plate 24 and ring set 22
Between, using being tightly connected between pressing plate 24 and the ring set 22, by being separated out pressure water cavity 23 between ring set 22 and sleeve pipe 21, in ring
Cover 22 lower ends and be communicated with water inlet pipe 202, the upper end of ring set 22 is provided with blast pipe 201, and water inlet pipe 202 is connected with a compressed water generation apparatus,
Sealing bolt 27 is installed, it is latex film that described sleeve pipe 21 is made of on blast pipe 201, the infiltration funnel 7 is close by screw
Envelope is connected on pressing plate 24.
Specimen mounting 2 sealing concrete sample side wall process be：Sealing bolt 27 is first turned on, by compressed water generation apparatus by water
It is circulated into pressure water cavity 23, water rises gradually, the air in pressure water cavity 23 is drained, when water covers blast pipe 201, will
Sealing bolt 27 is installed in blast pipe 201, and with persistently pouring into for water, sleeve pipe 21 can be pressurized and be close to the week of concrete sample
Enclose, and then concrete sample side wall is completely sealed, when being seeped water to being pressurizeed in concrete sample using infiltration funnel 7, sample
Frame 2 ensures that water will not be leaked along concrete side wall, it is ensured that the accuracy of measurement.
The two ends of ring set 22 have ring flat-plate 222, and a circle annular protrusion 221 is provided with ring flat-plate 222, are set on the end face of pressing plate 24
There is a ring shape grooving, sealing ring 25 is provided with grooving, when two block pressur plates 24 are close to each other, the protrusion can be plugged into
In grooving, and it is pressed on sealing ring 25.This structure can improve the sealing effectiveness between ring flat-plate 222 and pressing plate 24, in addition
Grooving can limit raised 221 and expand outwardly, it is to avoid the two ends of ring set 22 are because being expanded outwardly deformation by hydraulic pressure.
The compressed water generation apparatus include water tank 6, and the one end of water inlet pipe 202 is connected in the bottom of water tank 6, on water tank 6
End face is communicated with the second compressed air hose 92, second pressure control valve 102, pressure is provided with the second compressed air hose 92 and is passed
The electrically-controlled valve 302 of sensor 10 and second.
After be circulated into for water in pressure water cavity 23 by water tank 6, the air in water tank 6 is monitored by pressure sensor 10
Pressure change, judges that pressure cavities whether there is leak, it is ensured that concrete sample side wall is effectively sealed, additionally, this pressure water is filled
Not only stable water outlet is put, by pressure-control valve compressed air pressure can also be controlled to adjust hydraulic pressure.
The liquid level gauge 8 is differential pressure levelmeter 8, and two measurement terminations 211 of differential pressure levelmeter 8 are connected to measurement pipe
Be transferred to for the liquid level signal and pressure signal of detection by 5 lower ends and the upper end of pressurized tank 4, differential pressure levelmeter 8 and pressure sensor 10
Computer, computer controls the first electrically-controlled valve 301 and the second electrically-controlled valve 302 are opened and closed.
A kind of method for testing concrete filtration coefficient, comprises the following steps：
The first step：Concrete sample is installed in specimen mounting 2 water is circulated into water tank 6, by compressed air by hydraulic pressure
Enter in pressure water cavity 23, allow water to cover blast pipe 201, after air emptying in pressure water cavity 23, will by sealing bolt 27
Blast pipe 201 is closed；
Second step：Continue to be pressed into compressed air in water tank 6, allow sleeve pipe 21 to be close to concrete around concrete sample,
Sealed with by concrete sample side wall；
3rd step：Water is circulated into storage tank 3, the first electrically-controlled valve 301 is opened, when water enters into infiltration funnel 7 and measurement pipe 5
Afterwards, the first electrically-controlled valve 301 is closed, if the water in storage tank 3 is drained, it is ensured that there is 2/3 case water in storage tank 3；
4th step：Compressed air is filled into storage tank 3 and pressurized tank 4, the water level in measurement pipe 5 is slow with concrete infiltration
Slow to decline, during decline, the difference in height of the real-time monitoring liquid level of differential pressure levelmeter 8, computer converses stream in measurement pipe 5
Fast v1, it is known that atmospheric pressure P, concrete sample length L, measurement pipe（5）Sectional area A1 and concrete sample sectional area A2, can obtain
By the flow velocity v2 of concrete sample；The coefficient of permeability K of sample is calculated by Darcy's law again, computing formula is：K=v2*L/P,
L is concrete sample length, and P is compressed air pressure.
Changed by fluid flow in the real-time monitoring measurement pipe 5 of liquid level gauge 8, can conveniently calculated mixed in random time section
The flow velocity of solidifying soil sample, and the sample coefficient of permeability K in the time period is calculated by Darcy's law.Draw out oozing for different time points
Permeability coefficient K change curves, control valve 101 to can control the pressure size of atmospheric pressure by adjusting first pressure, can be to coagulation
Native test specimen carries out multiple barometric gradient measurements, increased the reliability of result of the test.
, it is necessary to check pressure water cavity 23 before above-mentioned second step is carried out in a kind of method for testing concrete filtration coefficient
Sealing, inspection method is：Continue to be pressed into compressed air in water tank 6, when pressure sensor 10 is monitored in water tank 6
Air pressure when reaching second pressure and controlling the preset pressure of valve 102, the second electrically-controlled valve of computer controls 302 is closed, and allows water tank 6
Pressurize 5 to 10 minutes, pressure value in the then detection of pressure sensor 10 water tank 6, if pressure sensor 10 detects water storage
Pressure value controls more than the preset value 10kpa of valve 102 less than second pressure in tank 6, then represent and press water cavity 23 poorly sealed, exists
Leak presses the leakage point of water cavity 23, it is necessary to search, and leak source is blocked, until pressure water cavity 23 is fully sealed.
A kind of method for testing concrete filtration coefficient also includes the 5th step：The default bound head of measurement pipe 5 of computer
Liquid level, when head is less than bottom limit level, the first electrically-controlled valve of computer controls 301 is opened, and allows water level to rise, when water level rises to
During head upper limit level, the first electrically-controlled valve of computer controls 301 is closed, and realizes automatic watering, it is ensured that experiment can be carried out persistently.
Claims (8)
1. it is a kind of determine concrete permeability device, it is characterised in that：Including the specimen mounting for fixing concrete test specimen
（2）, and specimen mounting（2）The side wall of concrete sample can be sealed, also including passing sequentially through the infiltration funnel of pipeline communication
（7）, measurement pipe（5）, pressurized tank（4）And storage tank（3）, seep water funnel（7）It is sealed, detachable connection in specimen mounting
（2）One end, measurement pipe（5）Arrange vertically, in pressurized tank（4）And storage tank（3）First electrically-controlled valve is installed on the pipeline of connection
（301）, pressurized tank（4）And storage tank（3）Upper end is communicated with the first compressed air hose（91）, in the first compressed air hose（91）
On be provided with first pressure control valve（101）, in measurement pipe（5）On liquid level gauge is installed（8）.
2. it is according to claim 1 it is a kind of determine concrete permeability device, it is characterised in that：The specimen mounting（2）
Including the sleeve pipe being enclosed within outside concrete sample（21）, be enclosed within sleeve pipe（21）Outer ring set（22）Be separately positioned on concrete sample
Two pieces of annular pressing plates at two ends（24）, two block pressur plates（24）By many screw rods（241）Detachable connection, sleeve pipe（21）Two ends
Extend the termination of concrete sample（211）It is compacted pressing plate（24）Between concrete sample or pressing plate（24）With ring set
（22）Between, pressing plate（24）With the ring set（22）Between using being tightly connected, by ring set（22）And sleeve pipe（21）Between be separated out pressure
Water cavity（23）, in ring set（22）Lower end is communicated with water inlet pipe（202）, ring set（22）Upper end is provided with blast pipe（201）, water inlet pipe
（202）Connected with a compressed water generation apparatus, blast pipe（201）On sealing bolt is installed（27）, described sleeve pipe（21）It is latex to be
Film is made, the infiltration funnel（7）Pressing plate is sealedly connected on by screw（24）On.
3. it is according to claim 2 it is a kind of determine concrete permeability device, it is characterised in that：Ring set（22）Two ends have
Annulate lamella（222）, in ring flat-plate（222）It is provided with a circle annular protrusion（221）, in pressing plate（24）End face is provided with a ring shape and cuts
Groove, is provided with sealing ring in grooving（25）, by two block pressur plates（24）When close to each other, the protrusion can be plugged into grooving,
And it is pressed on sealing ring（25）On.
4. it is according to claim 3 it is a kind of determine concrete permeability device, it is characterised in that：The compressed water generation apparatus bag
Include water tank（6）, water inlet pipe（202）One end is connected in water tank（6）Bottom, in water tank（6）Upper surface is communicated with second
Compressed air hose（92）, the second compressed air hose（92）On be provided with second pressure control valve（102）, pressure sensor（10）With
Second electrically-controlled valve（302）.
5. it is according to claim 4 it is a kind of determine concrete permeability device, it is characterised in that：The liquid level gauge（8）
It is differential pressure levelmeter（8）, differential pressure levelmeter（8）And pressure sensor（10）The signal transmission that will be detected is to computer, computer
Control the first electrically-controlled valve（301）With the second electrically-controlled valve（302）Open and close.
6. it is according to claim 5 it is a kind of determine concrete permeability device, it is characterised in that：A kind of usage right will
The method for seeking the device to test concrete filtration coefficient described in 5, comprises the following steps：
The first step：Concrete sample is installed to specimen mounting（2）It is interior that water is circulated into water tank（6）It is interior, will by compressed air
Water is pressed into water cavity（23）It is interior, allow water to cover blast pipe（201）, then by sealing bolt（27）It is tightened onto blast pipe
（201）On；
Second step：Continue for compressed air to be pressed into water tank（6）In, allow sleeve pipe（21）It is close to concrete in concrete sample week
Enclose, by the sealing of concrete sample side wall；
3rd step：Water is circulated into storage tank（3）It is interior, open the first electrically-controlled valve（301）, when water enters into infiltration funnel（7）With
Measurement pipe（5）Afterwards, the first electrically-controlled valve（301）Close；
4th step：Compressed air is filled into storage tank（3）And pressurized tank（4）It is interior, measurement pipe（5）Interior water level is with concrete
Infiltration slowly declines, during decline, differential pressure levelmeter（8）The difference in height of real-time monitoring liquid level, computer converses survey
Buret（5）Interior flow velocity v1, it is known that atmospheric pressure P, concrete sample length L, measurement pipe（5）Sectional area A1 and concrete sample section
Product A2, according to continuity equation v2*A2=v1*A1, can obtain by the flow velocity v2 of concrete sample；Calculated by Darcy's law again
The coefficient of permeability K of sample, computing formula is：K=v2*L/P.
7. it is according to claim 6 it is a kind of determine concrete permeability device, it is characterised in that：A kind of usage right will
Ask in the method for the device to test concrete filtration coefficient described in 5 before above-mentioned second step is carried out, it is necessary to check pressure water cavity
（23）Sealing, inspection method is：Continue for compressed air to be pressed into water tank（6）In, work as pressure sensor（10）Monitoring
To water tank（6）Interior air pressure reaches second pressure control valve（102）Preset pressure when, the electrically-controlled valve of computer controls second
（302）Close, allow water tank（6）Pressurize for a period of time, then pressure sensor（10）Detection water tank（6）Interior pressure value, such as
If pressure sensor（10）Detect water tank（6）Interior pressure value controls valve less than second pressure（102）Preset value, then represent pressure
Water cavity（23）It is poorly sealed, there is leak, it is necessary to exclude leakage point, until pressure water cavity（23）It is fully sealed.
8. it is according to claim 6 it is a kind of determine concrete permeability device, it is characterised in that：A kind of usage right will
Seeking the method for the device to test concrete filtration coefficient described in 5 also includes the 5th step：Computer presets measurement pipe（5）Restrict water supply up and down
Head liquid level, when head is less than bottom limit level, the electrically-controlled valve of computer controls first（301）Open, allow water level to rise, when on water level
When being raised to head upper limit level, the electrically-controlled valve of computer controls first（301）Close, and then realize automatic watering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043510.0A CN106706500A (en) | 2017-01-21 | 2017-01-21 | Device for determining permeability of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043510.0A CN106706500A (en) | 2017-01-21 | 2017-01-21 | Device for determining permeability of concrete |
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| Publication Number | Publication Date |
|---|---|
| CN106706500A true CN106706500A (en) | 2017-05-24 |
Family
ID=58910077
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710043510.0A Pending CN106706500A (en) | 2017-01-21 | 2017-01-21 | Device for determining permeability of concrete |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101929A (en) * | 2017-05-31 | 2017-08-29 | 南京华研智能科技有限公司 | Concrete impermeability experimental rig |
| CN107589049A (en) * | 2017-08-02 | 2018-01-16 | 同济大学 | A kind of method and device for being used to determine cleaning agent diffusion coefficient in fouling membrane layer |
| CN107966394A (en) * | 2017-10-20 | 2018-04-27 | 四川大学 | A kind of full-automatic coefficient of permeability tester of hollow type rubber seal and its test method |
| CN108593526A (en) * | 2018-06-28 | 2018-09-28 | 中国农业科学院农田灌溉研究所 | Infiltration experimental rig |
| CN109459366A (en) * | 2018-11-21 | 2019-03-12 | 三峡大学 | A kind of device and method measuring unsaturated soil infiltration coefficient |
| CN110487699A (en) * | 2019-08-23 | 2019-11-22 | 淮阴工学院 | A kind of experimental rig and test method of pervious concrete infiltration coefficient |
| CN110726618A (en) * | 2019-10-17 | 2020-01-24 | 北京金河水务建设集团有限公司 | Quality detection instrument after concrete crack is handled |
| CN111257190A (en) * | 2019-12-19 | 2020-06-09 | 广西大学 | Anti-permeability instrument for semi-rigid base material |
| CN112362551A (en) * | 2020-10-29 | 2021-02-12 | 中国三峡建设管理有限公司 | Indoor convenient determination method and system for permeability of compact rock |
| CN114354081A (en) * | 2022-01-10 | 2022-04-15 | 镇江市建设工程质量检测中心有限公司 | Concrete slab leakage point detection device and detection method |
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| CN204177710U (en) * | 2014-09-16 | 2015-02-25 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of varying head permeability apparatus preventing infiltration cutting ring side seam from leaking |
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| CN104914029A (en) * | 2015-05-29 | 2015-09-16 | 浙江工业大学 | Large-size urban solid waste framework and pore water volume variation coefficient measurement device |
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| CN110726618A (en) * | 2019-10-17 | 2020-01-24 | 北京金河水务建设集团有限公司 | Quality detection instrument after concrete crack is handled |
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