CN107014737A - A kind of Surface layer's concrete gas permeability automatic test device - Google Patents
A kind of Surface layer's concrete gas permeability automatic test device Download PDFInfo
- Publication number
- CN107014737A CN107014737A CN201710422100.7A CN201710422100A CN107014737A CN 107014737 A CN107014737 A CN 107014737A CN 201710422100 A CN201710422100 A CN 201710422100A CN 107014737 A CN107014737 A CN 107014737A
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- China
- Prior art keywords
- concrete
- surface layer
- test
- pressure
- cylinder
- Prior art date
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 239000004567 concrete Substances 0.000 title claims abstract description 43
- 239000002344 surface layer Substances 0.000 title claims abstract description 21
- 230000035699 permeability Effects 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000000740 bleeding effect Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 5
- 238000013500 data storage Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 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
Landscapes
- 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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a kind of Surface layer's concrete gas permeability automatic test device, the permeance property for Site Detection Surface layer's concrete.The device includes：Gauge head, cylinder, air compressor machine, pressure regulator, pressure sensor and data acquisition unit.The gauge head, top is provided with intake valve and air bleeding valve, and concrete surface test position is fixed in bottom by bolt, nut；The cylinder, input is connected with air compressor machine, and output end is connected with pressure regulator；The pressure sensor input and cylinders, output end are connected with data acquisition unit；The data acquisition unit can in real time monitor, record and collect and the measured data of analysis.The present invention automatic detection can go out Surface layer's concrete air transmission coefficient in the short period of time.
Description
Technical field
It is more particularly to a kind of saturating by determining concrete the invention belongs to concrete permeability onthe technology of site test field
Gas coefficient determines the automatic test device of concrete permeability.
Background technology
The permeability of Surface layer's concrete directly determines the complexity inside hazardous medium intrusion concrete structure, can
Effectively reflect anticorrosive, the resist degradation ability of structure in itself.Due to permeability test medium (such as：Air, nitrogen, oxygen etc.) one
As will not occur physical action or chemical reaction with concrete material or bar construction and influence test result, and air-flow is on top layer
The transmission speed of concrete apparently higher than other media (such as：Water or ion), thus ventilative test is the current table more commonly used
Layer concrete testing permeability means.
Ventilative test existing at present is mostly laboratory method, there is no the scene of directly applying to, detection Surface layer's concrete
The method of infiltration coefficient.This, which is primarily due to laboratory equipment, needs to strictly being controlled in test condition, and on-the-spot test
Complicated condition is changeable, controllability is poor, it is often more important that can not accurately test gas motion speed under constant-pressure conditions, and then can not
Assess infiltration coefficient.Thus how at the scene control test pressure, the accurate gas flow rates that measure turn into top layer coagulation
The important technological problems of permeability of air test.
The content of the invention
To overcome this technology barrier, the present invention ensures test pressure using high-precision pressure adjuster and pressure sensor
Steady state is in detection process, calculating gas by pressure change in constant pressure lower cylinder flows into inside concrete volume,
And this volume is stored with data logger, to pass through Surface layer's concrete position in this computational rules time, under constant pressure effect
Air velocity, so as to automate the permeability for measuring Surface layer's concrete, it is to avoid manually-operated error.
A kind of Surface layer's concrete ventilation property test device, the device includes：Gauge head, cylinder, air compressor machine, pressure regulator,
Tracheae, pressure sensor and data acquisition unit.The gauge head periphery is provided with pressure gauge and tracheae provided with four bolt holes, top
Pressure regulator is linked, gauge head is fixed on concrete test position by bottom by foundation bolt, nut；The cylinder input
It is connected with air valve, cylinder air compressor machine, pressure sensor are connected, output end is connected with gauge head；The pressure sensor input with
Cylinder outside port is connected, and output end is connected with storage with the data acquisition unit of display function.
Start air compressor machine, open air valve, by tracheae to cylinder interior discharge pressure, treat that the reading of pressure sensor reaches
During pressure value set in advance, air compressor machine is closed, air valve is closed.Test pressure is adjusted using pressure regulator, it is ensured that in gauge head
Portion's pressure is in whole test process all in steady state.Over time, the pressure of cylinder interior is gradually reduced, and
The process that internal cylinder pressure reduces is exactly the process that gas penetrates into Surface layer's concrete.According to mass conservation law and Darcy's law
The Air permenbility by concrete in unit interval unit area at constant pressure is calculated, so that it is determined that the infiltration of Surface layer's concrete
Property.
Compared with other Surface layer's concrete permeability test methods, the present invention at least has the advantages that：
1st, the present invention automatic detection can go out Surface layer's concrete air transmission coefficient in the short period of time.
2nd, the present invention can directly be carried out in concrete structural surface, it is to avoid the damage to original structure, maintain entity knot
The integrality of structure.
3rd, tested media used in the present invention is general does not occur physics, chemical action with concrete material or reinforcing bar, this
Both the accuracy of test result had been effectively guaranteed, the infringement that test is brought to reinforced concrete structure is turn avoid.
4th, the present invention realizes the accurate test of scene automation of Surface layer's concrete gas permeability, realizes concrete in structure
Air transmission coefficient quantitative analysis.
Brief description of the drawings
In order that technical scheme, operation principle, beneficial effect are clearer, the invention provides drawings described below：
Fig. 1 Surface layer's concrete ventilation property test device overall schematics.
Wherein：Fig. 1 doubles as Figure of abstract.
In figure：(1) air compressor machine；(2) pressure sensor；(3) cylinder；(4) pressure regulator；(5) gauge head；(6) pressure gauge；
(7) data acquisition unit.
Embodiment
A kind of Surface layer's concrete ventilation property test device, as shown in figure 1, by gauge head, pressure regulator, cylinder, air compressor machine,
Pressure sensor and data acquisition unit are constituted；The gauge head periphery is provided with pressure gauge and air inlet provided with four bolt holes, top
Gauge head is fixed on concrete test position by valve, bottom by foundation bolt, nut；The gauge head inlet end and pressure regulator
Output end is connected with tracheae；The pressure regulator inlet end is connected with cylinder outlet side with tracheae；The cylinder is passed with pressure
Sensor test lead is connected, and cylinder intake end is connected with air valve, and air outlet valve is set on cylinder；The air valve other end and air compressor machine phase
Even；The pressure regulator signal end is connected with power line with data collecting instrument, and output end is with having storage and display function
Data acquisition unit is connected.
Provided with intake valve, the gauge head periphery provided with four bolt holes at the top of the gauge head, cylinder is provided with air bleeding valve, pressure
Power table and inlet end, periphery are equipped with rubber seal provided with four expansion bolt through holes, bottom.In concrete surface assigned position
Expansion bolt is squeezed into, gauge head is fixed on by concrete test position by expansion bolt, gauge head is made by bottom rubber gasket
It is brought into close contact with concrete test surface, prevents that gas is tested in test process produces side leakage.
Preferably, apparatus of the present invention are sealed gauge head to concrete test surface using four expansion bolts, expansion
Bolt is pressed gauge head to concrete surface using other structuring, it is therefore intended that gauge head and concrete test position is close
Laminating, to ensure that the sealing in test process is good.Multiple expansion bolts can also be used, and its object is to by test department
Position is fully sealed.
Preferably, what apparatus of the present invention were selected is that precision is the pressure gauge that 0.02bar, test scope are 0-6bar, but
The span bigger or higher pressure gauge of precision or electronic digital display pressure gauge can also be used for the test.
The cylinder is made up of air inlet port and air outlet shell, and piston rod is set in inside tube-like envelope and passed with displacement
The sound end of sensor is in contact, and water inlet port is connected by priming valve at the top of water pipe and gauge head, air inlet port by tracheae and
Pressure regulator output port is connected.
Preferably, apparatus of the present invention use the capacity of cylinder to be 50ml, on the premise of measuring accuracy is ensured, more great Rong
The hydraulic cylinder of amount or range can also be used for the test.
The pressure regulator is connected with air compressor machine, and air compressor machine used in the present invention is frequency conversion air compressor, in order that protecting
Demonstrate,prove the mutually coordinated work of air compressor machine and pressure regulator in test process.
The pressure sensor is connected with dc source, and its sound end is in contact with the piston rod position on hydraulic cylinder, letter
Number end is connected by data wire with data acquisition unit.The pressure sensor that the present invention is used is that range is that 0-30mm, precision are
0.1% LVDT pressure sensors.
The data acquisition unit has storage and analytic function, can complete at the real-time record and batch of test data
Reason.In order to simplify on-the-spot test equipment, the present invention uses battery power data collector, but can show test simultaneously
The cyclelog or Wireless data acquisition unit of time and record water-carrying capacity can also be applied to the test.
Above is the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as this hair
Bright protection domain.
Claims (3)
1. a kind of Surface layer's concrete gas permeability automatic test device, the permeance property for Site Detection Surface layer's concrete.Should
Device includes：Gauge head, cylinder, air compressor machine, pressure regulator, pressure sensor and data acquisition unit.The gauge head, top is provided with
Concrete surface test position is fixed in intake valve and air bleeding valve, bottom by bolt, nut；The cylinder, input and sky
Press is connected, and output end is connected with pressure regulator；The pressure sensor input and cylinders, output end are adopted with data
Storage is connected；The data acquisition unit can in real time monitor, record and collect and the measured data of analysis.
2. Surface layer's concrete ventilation property test device according to claim 1, it is characterised in that the test pressure scope
In 0-10bar.
3. Surface layer's concrete ventilation property test device according to claim 1, it is characterised in that the pressure regulator energy
Enough ensure that test pressure is in steady state in detection process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710422100.7A CN107014737A (en) | 2017-06-05 | 2017-06-05 | A kind of Surface layer's concrete gas permeability automatic test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710422100.7A CN107014737A (en) | 2017-06-05 | 2017-06-05 | A kind of Surface layer's concrete gas permeability automatic test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107014737A true CN107014737A (en) | 2017-08-04 |
Family
ID=59451228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710422100.7A Pending CN107014737A (en) | 2017-06-05 | 2017-06-05 | A kind of Surface layer's concrete gas permeability automatic test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107014737A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282783A (en) * | 2018-11-13 | 2019-01-29 | 浙江省水利河口研究院 | A kind of concrete carbonization depth original position damage-free measuring apparatus and method |
| CN110320146A (en) * | 2019-07-24 | 2019-10-11 | 北京耐尔得智能科技有限公司 | A kind of concrete air permeability apparatus and measuring method |
| CN112525794A (en) * | 2020-11-12 | 2021-03-19 | 清华大学 | Portable automatic tester and testing method for surface air permeability of material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323380A (en) * | 2013-06-09 | 2013-09-25 | 交通运输部公路科学研究所 | Concrete in-situ non-destructive gas permeability measurement device as well as method |
| CN104596910A (en) * | 2015-02-03 | 2015-05-06 | 重庆大学 | In-situ nondestructive concrete permeability testing device and testing method thereof |
| CN104880394A (en) * | 2015-05-04 | 2015-09-02 | 同济大学 | Concrete gas permeability testing apparatus and testing method thereof |
-
2017
- 2017-06-05 CN CN201710422100.7A patent/CN107014737A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323380A (en) * | 2013-06-09 | 2013-09-25 | 交通运输部公路科学研究所 | Concrete in-situ non-destructive gas permeability measurement device as well as method |
| CN104596910A (en) * | 2015-02-03 | 2015-05-06 | 重庆大学 | In-situ nondestructive concrete permeability testing device and testing method thereof |
| CN104880394A (en) * | 2015-05-04 | 2015-09-02 | 同济大学 | Concrete gas permeability testing apparatus and testing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| K. YANG等: "Development of a New In Situ Test Method to Measure the Air Permeability of High Performance Concretes", 《NDT & E INTERNATIONAL》 * |
| 张涛 等: "混凝土透气性测试方法研究概述", 《山西建筑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282783A (en) * | 2018-11-13 | 2019-01-29 | 浙江省水利河口研究院 | A kind of concrete carbonization depth original position damage-free measuring apparatus and method |
| CN110320146A (en) * | 2019-07-24 | 2019-10-11 | 北京耐尔得智能科技有限公司 | A kind of concrete air permeability apparatus and measuring method |
| CN112525794A (en) * | 2020-11-12 | 2021-03-19 | 清华大学 | Portable automatic tester and testing method for surface air permeability of material |
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Application publication date: 20170804 |