CN109696387A - The device and method of accurate measurement concrete permeability - Google Patents
The device and method of accurate measurement concrete permeability Download PDFInfo
- Publication number
- CN109696387A CN109696387A CN201811618419.8A CN201811618419A CN109696387A CN 109696387 A CN109696387 A CN 109696387A CN 201811618419 A CN201811618419 A CN 201811618419A CN 109696387 A CN109696387 A CN 109696387A
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- water
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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
- G01N15/082—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
Abstract
The present invention provides a kind of device of accurate measurement concrete permeability, silica gel cylinder, test chamber, pressure tester, flow registering instrument, data logger, water-supply-pipe, hydraulic cylinder, appendix, pressure regulator and air compressor machine including being used to fixing concrete test specimen and sealed test piece side.Concrete sample is fixed in silica gel cylinder by iron hoop circle, effectively prevent because concrete sample it is in irregular shape caused by the bad problem of leakproofness, and the installation of test specimen, disassembly process are simple, quick；Constant osmotic pressure is provided by pressure adjustable air compressor machine, the wider concrete material testing permeability of category can be coped with；The osmotic pressure that water is tested by pressure tester records water percolating capacity by flow registering instrument, improves measuring accuracy；It collected by data logger, save data, had the characteristics that convenient, fast.
Description
Technical field
The invention belongs to technical field of concrete, are related to a kind of device and method of accurate measurement concrete permeability.
Background technique
In general, water is the main media that hazardous medium enters inside concrete in environment, therefore the infiltration of concrete
Property determine reinforced concrete structure service life, so the permeability of Accurate Determining concrete is of great significance.Usually survey
The method for determining concrete permeability has steady flow method, penetration depth method, anti-penetration grade method.Steady flow method measures concrete and seeps
Permeability is common measuring method, and basic principle is Darcy's law.And when steady flow method measurement concrete permeability often
There is biggish error, need by the way that osmotic pressure and water percolating capacity is varied multiple times, test obtains osmotic pressure and infiltration magnitude relation, will
Fitting multi-group data obtains infiltration coefficient.
The device and Publication No. for a kind of easily-testing concrete permeability recorded in Publication No. CN206177780U
The water-permeable cement concrete osmotic coefficient investigating device and method recorded in CN103398929A cannot apply additional water pressure, because
, when test test specimen infiltration is slower, the testing time is longer for this.A kind of simple measuring recorded in Publication No. CN206177780U
The permeability measurement device leakproofness recorded in the device of concrete permeability is poor, is easy to produce error.
Summary of the invention
It is existing unadjustable using steady flow method measurement concrete permeability device osmotic pressure in order to solve, it tested
The problems such as journey concrete sample leakproofness is bad, and test result is inaccurate, the present invention provides a kind of measurements of concrete permeability
Automatic test device and method.
The present invention proposes a kind of accurate device of measurement concrete permeability comprising is used to fixing concrete test specimen and close
Seal silica gel cylinder, test chamber, pressure tester, flow registering instrument, data logger, water-supply-pipe, the hydraulic cylinder, gas transmission of test specimen side
Pipe, pressure regulator and air compressor machine.
Wherein, aqueduct is equipped at the top of the silica gel cylinder, outside is equipped with the iron hoop circle of fixing concrete test specimen.
Wherein, the test chamber is equipped with exhaust valve, and the pressure tester is arranged on test chamber.
Wherein, the hydraulic cylinder top surface is equipped with water injection valve.
Wherein, the pressure tester and flow registering instrument are connect with data logger；The silica gel cylinder passes through iron hoop circle
Fixing concrete test specimen is simultaneously connect with test chamber；The test chamber is connected with hydraulic cylinder by appendix；The test chamber passes through
Water-supply-pipe is connect with flow registering instrument, and flow registering instrument is connect with hydraulic cylinder by water-supply-pipe；The hydraulic cylinder and pressure are adjusted
Depressor is connected by appendix；Pressure regulator is connect with air compressor machine by appendix；The data logger can record in real time,
Storage test chamber water pressure and water flow data, related data can be exported.
Wherein, using iron hoop circle and silica gel cylinder fixing concrete test block, it is desirable that silica gel cylinder internal diameter and test block outer diameter miss
Difference is less than 3mm.
Wherein, there is drainage hole at the top of silica gel cylinder, connect water-supply-pipe, the height of drainage hole and the upper surface of concrete sample are high
Degree is consistent.
Wherein, drainage hole is equipped at the top of test chamber, drainage hole height and test chamber distance from top are less than 3mm.
Concrete permeability is measured the present invention also provides the device using above-mentioned accurate measurement concrete permeability to survey
The method of examination comprising:
The first step, take height be L, the concrete sample that infiltrating area is A, be dipped to water-saturated state, pass through iron hoop circle general
Concrete sample is fixed in silica gel cylinder and connect with test chamber；
Second step is opened test chamber top vent valve, is filled the water by water injection hole into hydraulic cylinder, and air compressor machine, pressure are adjusted
Device powers on, and injects water into test chamber, discharge test chamber air；
Third step, pressure regulator control air compressor machine and export constant pressure, connect flow registering instrument, pressure tester, number
According to recorder, the pressure in water flow and test chamber is recorded；
4th step, data are exported, and obtaining the interior area that passes through of set time t after steady seepage occurs is A, highly for L's
The water Q of concrete sample obtains the permeability coefficient of concrete by following formula, measures infiltration different when a variety of osmotic pressure
Water is fitted infiltration coefficient；
K- infiltration coefficient, mm/s；Q- unit time water percolating capacity, mm3/s；P- osmotic pressure, Mpa；A test specimen infiltration area, mm2；
T- seeps water the time, s；The average thickness of L- test specimen, mm；
5th step after measurement is completed, closes air compressor machine, pressure sensor, iron hoop circle is dismantled, and takes out concrete examination
Part.The permeability of next concrete sample can be measured by repeating the above steps；
6th step after device use, successively closes air compressor machine, pressure regulator, flow registering instrument, pressure test
Device, data collecting instrument dismantle iron hoop circle, take out concrete sample, and remaining water in test chamber and hydraulic cylinder is discharged and dries.
Beneficial technical effect
In concrete permeability measurement device provided by the invention, concrete sample is fixed by iron hoop circle and silica gel cylinder
In test chamber, effectively prevent because concrete sample it is in irregular shape caused by the bad problem of leakproofness, and the peace of test specimen
Dress, disassembly process are simple, quick；
Apply water pressure, pressure adjustable section by air compressor machine, test obtains the relationship of different pressures and the flow that seeps water, can answer
The concrete material permeability measurement wider to category；
The osmotic pressure that water is tested by pressure tester records water percolating capacity by flow registering instrument, improves instrument certainly
Dynamicization and measuring accuracy；
It collected by data logger, save data, had the characteristics that convenient, fast.
Detailed description of the invention
Fig. 1 is for overall structure diagram of the invention；
Fig. 2 is the schematic diagram of test chamber；
Fig. 3 is the top view of test chamber；
In figure: 1, concrete sample, 2, silica gel cylinder, 2-1, aqueduct, 2-2, iron hoop circle, 3, test chamber, 3-1, exhaust valve,
3-2, pressure test hole, 3-3, water injection hole, 3-4, gas vent, 4, pressure tester, 5, flow registering instrument, 6, data logger,
7, water-supply-pipe, 8, hydraulic cylinder, 9, appendix, 10, pressure regulator, 11, air compressor machine.
Specific embodiment
The present invention proposes a kind of accurate device of measurement concrete permeability comprising is used to fixing concrete test specimen and close
Seal the silica gel cylinder of side, test chamber, pressure tester, flow registering instrument, data logger, water-supply-pipe, hydraulic cylinder, appendix,
Pressure regulator and air compressor machine.
Aqueduct is equipped at the top of the silica gel cylinder, outside is equipped with the iron hoop circle of fixing concrete test specimen.
The test chamber is equipped with exhaust valve, and the pressure tester is arranged on test chamber.
The hydraulic cylinder top surface is equipped with water injection valve.
The pressure tester and flow registering instrument are connect with data logger；The silica gel cylinder is fixed mixed by iron hoop circle
Solidifying soil test specimen and connecting test chamber；The test chamber is connected with hydraulic cylinder by appendix；The test chamber by water-supply-pipe with
Flow registering instrument connection, flow registering instrument are connect with hydraulic cylinder by water-supply-pipe；The hydraulic cylinder adjusts depressor with pressure and passes through
Appendix connection；Pressure regulator is connect with air compressor machine by appendix；The data logger can record in real time, store test
Chamber water pressure and water flow data, related data can be exported.
Using iron hoop circle and silica gel cylinder fixing concrete test block, it is desirable that silica gel cylinder internal diameter and test block outer diameter error are less than
3mm。
There is drainage hole at the top of silica gel cylinder, connects water-supply-pipe, the height of drainage hole and the upper level one of concrete sample
It causes.
Drainage hole is equipped at the top of test chamber, drainage hole height and test chamber distance from top are less than 3mm.
Flow registering instrument simultaneous connection on pressure tester and water-supply-pipe at the top of test chamber, can be automatic according to recorder
Change synchronous recording seepage pressure and amount of seepage data.
Air compressor machine is controlled by pressure regulator, output pressure is constant, and constant osmotic pressure is provided for water penetration concrete.
Concrete permeability is measured the present invention also provides the device using above-mentioned accurate measurement concrete permeability to survey
The method of examination comprising:
The first step, take height be L, the concrete sample that infiltrating area is A, be dipped to water-saturated state, pass through iron hoop circle general
Concrete sample is fixed in silica gel cylinder and connect with test chamber；
Second step is opened test chamber top vent valve, is filled the water by water injection hole into hydraulic cylinder, and air compressor machine, pressure are adjusted
Device powers on, and injects water into test chamber, discharge test chamber air；
Third step, pressure regulator control air compressor machine and export constant pressure, connect flow registering instrument, pressure tester, number
According to recorder, the pressure in water flow and test chamber is then recorded；
4th step, data are exported, and obtaining the interior area that passes through of set time t after steady seepage occurs is A, highly for L's
The water Q of concrete sample obtains the permeability coefficient of concrete by following formula, measures infiltration different when a variety of osmotic pressure
Water is fitted infiltration coefficient；
K- infiltration coefficient, mm/s；Q- unit time water flow, mm3/s；P- osmotic pressure, Mpa；A test specimen infiltrating area, mm2；
T- time of penetration, s；The average thickness of L- test specimen, mm；
5th step after the completion of measurement, closes air compressor machine, pressure sensor, iron hoop circle is dismantled, takes out concrete sample.
The permeability of other concrete samples can be measured by repeating the above steps；
6th step after device use, successively closes air compressor machine, pressure regulator, flow registering instrument, pressure test
Device, data collecting instrument dismantle iron hoop circle, take out concrete sample, and water in test chamber and hydraulic cylinder is discharged and dries.
Below using embodiment and attached drawing come the embodiment that the present invention will be described in detail, how skill is applied to the present invention whereby
Art means solve technical problem, and the realization process for reaching technical effect can fully understand and implement.
As shown in Figure 1 to Figure 3, the present invention provides a kind of device of accurate measurement concrete permeability comprising is used to solid
Determine the silica gel cylinder 2 of concrete sample and seal side, test chamber 3, pressure tester 4, flow registering instrument 5, data logger 6,
Water-supply-pipe 7, hydraulic cylinder 8, appendix 9, pressure regulator 10, air compressor machine 11；Aqueduct 2-1 is equipped at the top of the silica gel cylinder, outside
Portion is equipped with the iron hoop circle 2-2 of fixing concrete test specimen 1；The test chamber is equipped with exhaust valve 3-1, pressure tester 4, and Fig. 3 is shown
Pressure test hole 3-2, water injection hole 3-3, the gas vent 3-4 of test chamber under depression angle；The hydraulic cylinder top surface is equipped with note
Water valve 8-1；The pressure tester 4 and flow registering instrument 5 are connect with data logger 6；The silica gel cylinder 2 passes through iron hoop circle 2-
2 fixing concrete test specimens 1 and connecting test chamber；The test chamber 3 is connected with hydraulic cylinder 8 by appendix 7；The test chamber is logical
It crosses water-supply-pipe 7 to connect with flow registering instrument 5, flow registering instrument 5 is connect with hydraulic cylinder 8 by water-supply-pipe 7；The hydraulic cylinder 8 with
Pressure adjusts depressor 10 and is connected by appendix 9；Pressure regulator 10 is connect with air compressor machine 11 by appendix 9；The data
Recorder 6 can record in real time, store test chamber water pressure and water flow data, and related data can be exported.
The concrete sample that the present embodiment is related to a thickness of 50mm, diameter 100mm, corresponding silica gel cylinder interior diameter is
100mm is highly 150mm, smooth to the progress of concrete sample side before test, uniformly smears vaseline, passes through and iron is adjusted
Cranse fixing concrete test specimen.The leakproofness of fixed concrete sample is tested before test, adds water to silica gel cylinder
Side has seen whether that appreciable current is reserved by concrete sample side, if there is obvious water droplet to flow out from side, seals not
Completely, sealing is re-started；The material of test chamber is stainless steel, outer diameter 100mm, top wall thickness 3mm；The amount of pressure tester
Journey is no less than 20bar；Height of the test chamber inner vent apart from top surface should not exceed 3mm, guarantee that test chamber air is complete
Discharge；The data logger that the present apparatus uses is connect with pressure tester and flow registering instrument, synchronous recording osmotic pressure and water
Flow；Test chamber is connected with hydraulic cylinder by dismountable water-supply-pipe, and instrument movement, storage are facilitated；Note is equipped at the top of hydraulic cylinder
Water valve adds water into hydraulic cylinder by funnel；Pressure regulator in the present apparatus can guarantee that hydraulic cylinder exports constant pressure.
The specific test method is as follows:
One, taking height is the concrete sample of L=50mm, diameter D=100mm, impregnates for 24 hours, reaches in water before test
Water-saturated state.Concrete sample side is subjected to smooth processing, is put into silica gel cylinder after film vaseline, will be mixed by iron hoop circle
Solidifying soil test specimen is fixed in silica gel cylinder and connect with test chamber；
Two, test chamber top vent valve is opened, is filled the water by water injection hole into hydraulic cylinder.Air compressor machine, pressure regulator connect
Energization source, injects water into test chamber, discharge test chamber air；
Three, pressure regulator controls air compressor output pressure, connects flow registering instrument, pressure tester, data logger,
Record the pressure constant force in water flow and test chamber；
Four, data are exported, it is highly the coagulation of L that obtaining the interior area that passes through of set time t after steady seepage occurs, which is A,
The water Q of native test specimen obtains the permeability coefficient of concrete by following formula, measures the water percolating capacity under a variety of water pressures, intends
Infiltration coefficient is closed, to reduce error；
K- infiltration coefficient, mm/s；Q- unit time water flow, mm3/s；P- osmotic pressure, Mpa；A test specimen infiltrating area, mm2；
T- time of penetration, s；The average thickness of L- test specimen, mm；
5th step after measurement is completed, closes air compressor machine, pressure sensor, iron hoop circle is dismantled, and takes out concrete examination
Part.The permeability of next concrete sample can be tested by repeating the above steps；
6th step after device use, successively closes air compressor machine, pressure regulator, flow registering instrument, pressure test
Device, data collecting instrument dismantle iron hoop circle, take out concrete sample, and remaining water in test chamber and hydraulic cylinder is discharged and dries.
All above-mentioned this intellectual properties of primarily implementation, there is no this new products of implementation of setting limitation other forms
And/or new method.Those skilled in the art will utilize this important information, above content modification, to realize similar execution feelings
Condition.But all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (9)
1. a kind of device of accurate measurement concrete permeability, it is characterised in that: including being used to fixing concrete test specimen and sealing
The silica gel cylinder of side, test chamber, pressure tester, flow registering instrument, data logger, water-supply-pipe, hydraulic cylinder, appendix, pressure
Draught control mechanism and air compressor machine.
2. the device of accurate measurement concrete permeability as described in claim 1, it is characterised in that: set at the top of the silica gel cylinder
There is aqueduct, outside is equipped with the iron hoop circle of fixing concrete test specimen.
3. the device of accurate measurement concrete permeability as claimed in claim 1 or 2, it is characterised in that: on the test chamber
Equipped with exhaust valve, the pressure tester is arranged on test chamber.
4. the device of accurate measurement concrete permeability as described in claims 1 to 3, it is characterised in that: the hydraulic cylinder top
Face is equipped with water injection valve.
5. the device of the accurate measurement concrete permeability as described in Claims 1-4, it is characterised in that: the pressure test
Instrument and flow registering instrument are connect with data logger；The silica gel cylinder passes through iron hoop circle fixing concrete test specimen and connecting test
Chamber；The test chamber is connected with hydraulic cylinder by appendix；The test chamber is connect by water-supply-pipe with flow registering instrument, flow
Recorder is connect with hydraulic cylinder by water-supply-pipe；The hydraulic cylinder adjusts depressor with pressure and is connect by appendix；Pressure is adjusted
Device is connect with air compressor machine by appendix；The data logger can record in real time, store test chamber water pressure and water flow number
According to related data can be exported.
6. the device of the accurate measurement concrete permeability as described in claim 1 to 5, it is characterised in that: using iron hoop circle and
Silica gel cylinder fixing concrete test block, it is desirable that silica gel cylinder internal diameter and test block outer diameter error are less than 3mm.
7. the device of the accurate measurement concrete permeability as described in claim 1 to 6, it is characterised in that: have at the top of silica gel cylinder
Drainage hole connects water-supply-pipe, and the height of drainage hole and the upper level of concrete sample are consistent.
8. the device of the accurate measurement concrete permeability as described in claim 1 to 7, it is characterised in that: set at the top of test chamber
There is drainage hole, drainage hole height and test chamber distance from top are less than 3mm.
9. being measured concrete permeability measurement using the device of claim 1 to the 8 accurate measurement concrete permeability
Method characterized by comprising
The first step, to take height be L, the concrete sample that infiltrating area is A, water-saturated state is dipped to, by iron hoop circle by coagulation
Native test specimen is fixed in silica gel cylinder and connect with test chamber；
Second step is opened test chamber top vent valve, is filled the water by water injection hole into hydraulic cylinder, air compressor machine, pressure regulator connect
Energization source, injects water into test chamber, discharge test chamber air；
Third step, pressure regulator control air compressor machine and export constant pressure, connect flow registering instrument, pressure tester, data note
Instrument is recorded, the pressure in water flow and test chamber is recorded；
4th step, data are exported, and it is highly the coagulation of L that obtaining the interior area that passes through of set time t after steady seepage occurs, which is A,
The water Q of native test specimen obtains the permeability coefficient of concrete by following formula, measures the water percolating capacity under a variety of water pressures, intends
Infiltration coefficient is closed, to reduce error；
K- infiltration coefficient, mm/s；Q- unit time water flow, mm3/s；P- osmotic pressure, Mpa；A test specimen infiltrating area, mm2；T- seeps
Saturating time, s；The average thickness of L- test specimen, mm；
5th step after measurement is completed, closes air compressor machine, pressure sensor, iron hoop circle is dismantled, takes out concrete sample,
The permeability of next concrete sample can be measured by repeating the above steps；
6th step after device use, successively closes air compressor machine, pressure regulator, flow registering instrument, pressure tester, number
According to Acquisition Instrument, iron hoop circle is dismantled, takes out concrete sample, remaining water in test chamber and hydraulic cylinder is discharged and is dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811618419.8A CN109696387A (en) | 2018-12-27 | 2018-12-27 | The device and method of accurate measurement concrete permeability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811618419.8A CN109696387A (en) | 2018-12-27 | 2018-12-27 | The device and method of accurate measurement concrete permeability |
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| Publication Number | Publication Date |
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| CN109696387A true CN109696387A (en) | 2019-04-30 |
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ID=66232159
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| CN201811618419.8A Pending CN109696387A (en) | 2018-12-27 | 2018-12-27 | The device and method of accurate measurement concrete permeability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486678A (en) * | 2022-01-14 | 2022-05-13 | 东南大学 | Device and method for quickly detecting microscopic pore characteristics of mortar on concrete surface |
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| CN200968922Y (en) * | 2006-11-10 | 2007-10-31 | 湖北葛洲坝试验检测有限公司 | Extrusion side wall and flexible concrete drainage indicator |
| CN104677803A (en) * | 2015-03-12 | 2015-06-03 | 河南理工大学 | Constant and variable head composite penetration testing device |
| CN206440587U (en) * | 2016-12-26 | 2017-08-25 | 江苏苏博特新材料股份有限公司 | A kind of test device of novel water permeable concrete permeable coefficient |
| CN209727710U (en) * | 2018-12-27 | 2019-12-03 | 青岛理工大学 | The device of accurate measurement concrete permeability |
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2018
- 2018-12-27 CN CN201811618419.8A patent/CN109696387A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200968922Y (en) * | 2006-11-10 | 2007-10-31 | 湖北葛洲坝试验检测有限公司 | Extrusion side wall and flexible concrete drainage indicator |
| CN104677803A (en) * | 2015-03-12 | 2015-06-03 | 河南理工大学 | Constant and variable head composite penetration testing device |
| CN206440587U (en) * | 2016-12-26 | 2017-08-25 | 江苏苏博特新材料股份有限公司 | A kind of test device of novel water permeable concrete permeable coefficient |
| CN209727710U (en) * | 2018-12-27 | 2019-12-03 | 青岛理工大学 | The device of accurate measurement concrete permeability |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486678A (en) * | 2022-01-14 | 2022-05-13 | 东南大学 | Device and method for quickly detecting microscopic pore characteristics of mortar on concrete surface |
| CN114486678B (en) * | 2022-01-14 | 2024-05-03 | 东南大学 | Device and method for rapidly detecting microscopic pore characteristics of concrete surface mortar |
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