CN109282783A - A kind of concrete carbonization depth original position damage-free measuring apparatus and method - Google Patents
A kind of concrete carbonization depth original position damage-free measuring apparatus and method Download PDFInfo
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- CN109282783A CN109282783A CN201811342277.7A CN201811342277A CN109282783A CN 109282783 A CN109282783 A CN 109282783A CN 201811342277 A CN201811342277 A CN 201811342277A CN 109282783 A CN109282783 A CN 109282783A
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- 238000003763 carbonization Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229920001971 elastomer Polymers 0.000 claims abstract description 58
- 238000013507 mapping Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 230000001066 destructive effect Effects 0.000 claims description 4
- 244000144985 peep Species 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000012886 linear function Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 241001269238 Data Species 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035699 permeability Effects 0.000 abstract description 8
- 238000000691 measurement method Methods 0.000 abstract description 6
- 230000015271 coagulation Effects 0.000 abstract description 5
- 238000005345 coagulation Methods 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 21
- 239000010410 layer Substances 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- SPBWHPXCWJLQRU-FITJORAGSA-N 4-amino-8-[(2r,3r,4s,5r)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-oxopyrido[2,3-d]pyrimidine-6-carboxamide Chemical compound C12=NC=NC(N)=C2C(=O)C(C(=O)N)=CN1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O SPBWHPXCWJLQRU-FITJORAGSA-N 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000061458 Solanum melongena Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/18—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
-
- 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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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
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Abstract
The present invention relates to building hydraulic engineering concrete structure durability field, in particular to a kind of concrete carbonization depth original position damage-free measuring apparatus and method.A kind of concrete carbonization depth original position of the invention damage-free measuring apparatus, including air compressor, air valve, pressure sensor, data actuation, gauge head, rubber base ring and pressure regulator valve, rubber base ring is equipped with below gauge head, gauge head includes gauge head cavity and gauge head air inlet, pressure sensor one end connects gauge head cavity, the pressure sensor other end is connect with data actuation, gauge head air inlet is connected by tracheae with air valve, air valve is connected by tracheae with air compressor, air compressor is connected by tracheae with pressure regulator valve, and pressure regulator valve is connected with air valve.The present invention is based on the mapping relations of coagulation permeability of air and carbonation depth, and with this from face domain angle, the carbonation depth of quantitative description concrete partial region, result, which compares traditional point carbonation depth measurement method, reduces human factor bring adverse effect.
Description
Technical field
The present invention relates to building hydraulic engineering concrete structure durability field, in particular to a kind of concrete carbonization depths
Damage-free measuring apparatus in situ and method.
Background technique
The carbonization of concrete refers to the CO in air2It reacts with the liquid phase alkaline matter in concrete, so that coagulation
The neutralisation reaction process that chemical component changes in native alkalinity decline and concrete.Since concrete is a kind of porous media, greatly
CO in gas2In the case where humidity is suitable, it can decompose and react with the hydrated product in cement, generate CaCO3。
The pore water of concrete is calcium hydroxide saturated solution, and pH value is about 12~13, is in strong basicity.Since carbonization is made
With calcium hydroxide becomes calcium carbonate, and original strong basicity of Behavior of Hardened Cement Paste gradually decreases, and pH value is down to 8.5 or so, and this phenomenon claims
For neutralisation.
With being rooted in the hearts of the people for " partial carbonization zone " concept, people gradually recognize that neutralization depth is not up to concrete
When protective layer thickness, the passivating film of rebar surface can be destroyed, after passivating film is destroyed, along with the common of water and air
Effect, reinforcing bar just will appear corrosion.The volume expansion (2~3 times bigger than former iron volume) that corrosion generates will lead to reinforcing bar length side
To there is longitudinal crack, promote crack, be further exacerbated by the corrosion of reinforcing bar, will finally make concrete structure structure
Failure damage occurs for part.
At present in engineering common concrete carbonization depth measurement method be based on phenolphthalein reagent in highly basic in aubergine,
It is colourless feature in weak base, makes a call to an aperture, cleaning hole intraclast and powder taking a sample test position with electric drill, and be by concentration immediately
1% phenolphthalein alcoholic solution instills in hole wall, the distance then to be changed colour with calliper to measure surface to depth, as carbonation depth.By
It is relatively strong in concrete structural surface material properties, local environment randomness, differ greatly, this allows for this with " point " generation " face "
Measurement method it is not comprehensive enough, also under-represented, so as to cause adjacent members carbonation depth measured value phase in practical projects
The abnormal conditions of difference times often occur.In addition, in practical projects, finding the reading of carbonation depth and inconvenience, especially
The biggish component of carbonation depth, drilling is too small to lead in hole that dark, sight is bad, and the data human error of naked-eye observation is larger.
For the limitation of current concrete carbonization depth measurement method, need to propose that a kind of new carbonization from face domain angle is deep
Spend non-destructive measuring method in situ.
In non-patent literature 1(" Some effects of cement and curing upon carbonation and
reinforcement corrosion in concrete”Parrott, L.J. et al, Materials and
Structures, 1996, Vol 29, Page:164-173) mapping that concrete carbonization depth and gas permeability are described in is closed
System is linear relationship, and the mapping relations are not influenced by cement type or curing condition.In addition, in non-patent literature 2(" carbonization
Influence to concrete permeability and porosity " Zhao Tiejun etc., industrial building, 2003, the page number: volume 33 is recorded in 16,46-47)
Influence of the carbonization time (depth) to concrete pore rate (gas permeability), which, which shows to be carbonized, will reduce concrete
Porosity, mapping relations are approximately linear.The numerous studies of domestic and foreign scholars more unify this phenomenon
Description, it is numerous to list herein.This mapping relations provide a kind of new thinking for concrete carbonization depth measurement method,
Go quantitative description concrete carbonization depth that there should be biggish realization may with coagulation permeability of air.
Summary of the invention
It is representative insufficient, artificial that the purpose of the present invention is to solve traditional coagulation carbonation depth detection method inspection results
Thus the problems such as observation error is big provides a kind of carbonation depth without measuring all points to be measured, and error is lesser mixed
Solidifying soil carbonation depth original position damage-free measuring apparatus and method.
The specific technical solution that the present invention uses is as follows:
A kind of concrete carbonization depth original position damage-free measuring apparatus, including air compressor, air valve, pressure sensor, number are adopted and are
System, gauge head, rubber base ring and pressure regulator valve, the gauge head lower section are equipped with rubber base ring, and the gauge head includes gauge head cavity and gauge head
Air inlet, described pressure sensor one end connect gauge head cavity, and the pressure sensor other end is connect with data actuation, described
Gauge head air inlet is connected by tracheae with air valve, and the air valve is connected by tracheae with air compressor, the air compressor
It is connected by tracheae with pressure regulator valve, the pressure regulator valve is connected with air valve.
The gauge head is connected with rubber base ring by buckle-type.
Rubber base ring bottom surface is equipped with thin layer rubber seal, and the thin layer rubber seal and rubber base ring pass through can
Disassembly mode connects.
The pressure sensor uses semiconductor transducer, range 0-1.0MPa, precision 0.1%FS.
The gauge head cavity volume is adjustable.Gauge head cavity volume is adjusted to the prior art, such as by cavity top
Portion's addition different-thickness, the mode with magnetic metal gasket adjusts step by step.
The gauge head is stainless steel gauge head.Stainless steel gauge head has good magnetic flux, is easy after being attracted conveniently by magnet
It is continuous, it can cooperate with the regulative mode of above-mentioned gauge head cavity volume.
A method of using above-mentioned concrete carbonization depth original position damage-free measuring apparatus, include the following steps:
(1) concrete tested region pre-processes: selected tested region brushes away the cement serous coat of detected concrete component surface；
(2) gauge head is installed: the gauge head is connect with detected concrete component by rubber base ring gluing, and installs concrete carbon
Change depth original position damage-free measuring apparatus；
(3) pressurization and pressure regulation: after being bonded sufficiently to rubber base ring and surface of concrete structure, gauge head cavity volume is set, is beaten
It opens air compressor to air pressure and reaches 1MPa, close air compressor；Pressure regulator valve and air valve are opened, by tracheae to gauge head cavity
Conveying air pressure, when pressure sensor shows that data reach predetermined pressure P0When less than 1MPa, closing pressure-regulating valve and air valve immediately, together
When record the time t0；
(4) record air pressure changes with time situation: recording a certain moment t1Under pressure P1, the t1Greater than t0；
(5) it calculates air transmission coefficient API: passing through formula, calculate the concrete air transmission coefficient of tested region
API；
(6) reference data for obtaining two groups of concrete carbonization depth D and air transmission coefficient API, establishes carbonation depth D and air transmission coefficient
The linear functional relation formula D of API=k*API+c(k、cIt is constant)；
(7) according to the API of step (5) and the functional relation of step (6), concrete carbonization depth is calculated.
The volume of setting cavity is selected according to the porosity of detected concrete component in the step (3), and porosity is greatly then
Big gauge head cavity volume is selected, small gauge head cavity volume is selected if porosity is small.
The step (6) specifically comprises the following steps: to select 2 secondary tested regions, carries out concrete carbonization detection and try
It tests, each tested region hole number is 3, and the carbon of tested region is finally represented with the average value of the carbonation depth of 3 peep holes
Change depth, obtains two groups of reference data (API1, D1), (API2, D2), fitting obtain linear function D=k*API+c, establish carbonization
The mapping relations of depth and air transmission coefficient.
Gauge head lower part is connected with rubber base ring by buckle-type in the step (2), and rubber base ring bottom is with removable
The mode of unloading is equipped with thin layer rubber seal, and the lower surface of the thin layer rubber seal is tight with the surface of detected concrete component
Closely connected conjunction.
A method of using above-mentioned concrete carbonization depth original position damage-free measuring apparatus, which is characterized in that including such as
Lower specific steps:
(1) the impervious property experiment process of concrete for hydraulic structure is referred to, tested region is selected, brushes away surface of concrete structure with wire brush
Cement serous coat guarantees that gas can pass through concrete surface and enter component inside, the true permeability for reflecting component.
(2) gauge head and rubber base ring connects using buckle-type, using cavity gas pressure intensity self-closed gauge head card slot and
Gap between rubber base ring, to reach sealing effect；Gauge head is connect with detected concrete component by rubber base ring gluing, is surveyed
Head cavity forms confined space, and rubber base ring bottom surface is arranged interchangeable thin layer rubber seal, in order to dismantle, and installs
Concrete carbonization depth original position damage-free measuring apparatus；
(3) to rubber base ring and component surface concrete binding it is abundant after, set gauge head cavity volume as certain certain value, opening
Air compressor to air pressure reaches 1MPa, closes air compressor；Pressure regulator valve and air valve are opened, it is defeated to gauge head cavity by tracheae
It supplies gas pressure, when pressure sensor shows that data reach predetermined pressure P0When (be less than 1MPa, unit: Pa), closing pressure-regulating valve immediately
And air valve, while the t that records the time0(unit: min).
(4) process of pressure sensor data decline is empty intracavity gas to the process spread inside concrete component,
Record a certain moment t1Pressure P under (unit: min)1(unit: Pa) then can be in step if pressure sensor data changed slowly
Accelerate this process by way of reducing cavity volume when rapid three, it should be noted that the volume will not after once fixing
It changes again, to guarantee that the air transmission coefficient API at tested each position of component is obtained in identical conditions.
(5) diffusion theory according to gas in porous media can obtain Surface layer's concrete air transmission coefficient:
In above-mentioned formula, each symbolic significance embodies in the foregoing written description, repeats no more.According to step
Three and four record resulting data, can calculate the concrete air transmission coefficient API of tested region.
(6) assume that tested region hasnIt is a, tested 2 secondary tested regions of component are selected, traditional concrete carbonization is carried out
Detection test, each tested region hole number are 3, finally represent tested area with the average value of the carbonation depth of 3 peep holes
The carbonation depth in domain obtains two groups of reference data (API1, D1), (API2, D2), fitting obtain linear function D=k*API+c, build
The mapping relations of vertical carbonation depth and air transmission coefficient.
(7) in additionnThe concrete carbonization depth of -2 tested regions, can be by air transmission coefficient API and step that step 5 obtains
Rapid six obtain linear functional relation formula D=k*API+c。
The present invention compared with the prior art for, have the advantages that
(1) from face domain angle, traditional carbonation depth measurement method to fan out from point to area is changed, obtained carbonation depth tool
There is higher reliability, also can more react the truth of surface of concrete structure carbonization.
(2) rubber base ring is used, reference data is removed and needs except 2 groups of punctured datas, remaining test is to concrete structure
Part is almost lossless, this is very important the component for having protection to require.
(3) rubber base ring and gauge head are connect using buckle-type, using air pressure self-closed gauge head card slot, convenient disassembly, easily
In cleaning；Rubber base ring bottom uses interchangeable thin layer rubber seal, is convenient to remove gauge head when being completed
With the bonding connection of tested component, complicated cleaning work is avoided, is improved work efficiency.
(4) gauge head cavity volume is adjustable, and different cavity volumes can be used for different concrete components, improves this
The applicability and sensitivity of invention device, have compressed the testing time.
(5) go the carbonization for inquiring into tested region entirety deep according to the mapping relations of concrete air transmission coefficient and carbonation depth
Degree helps to reduce conventional macroscopic observation bring human error, it is deep to have evaded the concrete component carbonization that conventional method obtains
Spend the biggish un-reasonable phenomenon of discreteness.
(6) of the invention since measuring device is simple, convenient, data actuation is able to record complete test data, after convenient
Continuous calculation processing, therefore measurement task can be carried out parallel, the concrete carbonization depth measurement numerous especially suitable for test position
Work, it is expected to save a large amount of manpower and time.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of concrete carbonization depth original position of the invention damage-free measuring apparatus；
Fig. 2 is the top view of gauge head in a kind of damage-free measuring apparatus of concrete carbonization depth original position of the invention；
Fig. 3 is the cross section structure schematic diagram in the direction Fig. 2 A-A；
Wherein label: 1. air compressors；2. air valve；3. pressure sensor；4. data actuation；5. gauge head；6. rubber base ring；7.
Detected concrete component；8. tracheae；9. pressure regulator valve.
Specific embodiment
Embodiment 1
1-3 with reference to the accompanying drawing, the present invention will be further described.
A kind of concrete carbonization depth original position damage-free measuring apparatus, including air compressor 1, air valve 2, pressure sensor 3,
Data actuation 4, gauge head 5, rubber base ring 6 and pressure regulator valve 9, are equipped with rubber base ring 6 below gauge head 5, gauge head 5 include gauge head cavity and
Gauge head air inlet, 3 one end of pressure sensor connect gauge head cavity, and 3 other end of pressure sensor is connect with data actuation 4, gauge head
Air inlet is connected by tracheae 8 with air valve 2, and air valve 2 is connected by tracheae 8 with air compressor 1, and air compressor 1 passes through gas
Pipe 8 is connected with pressure regulator valve 9, and pressure regulator valve 9 is connected with air valve 2.Gauge head 5 is connected with rubber base ring 6 by buckle-type, pressure sensor
3 use semiconductor transducer, range 0-1.0MPa, precision 0.1%FS, and 5 cavity volume of gauge head is adjusted.
A method of using above-mentioned concrete carbonization depth original position damage-free measuring apparatus, comprise the following specific steps that:
(1) concrete component tested region surface preparation
The cement serous coat of concrete surface has certain sealing function, and fluid media (medium) (liquid, gas etc.) can partially be stopped to seep
Enter inside concrete component, for the permeability of true reflection component, it is necessary to brush away surface of concrete structure with wire brush
Cement serous coat guarantees that gas can pass through concrete surface and enter component inside.Due to use rubber base ring 6, for
One circle surface of concrete structure of 6 bonded part of rubber base ring, it is still necessary to polish processing, to guarantee gauge head and component bonding jail
It leans on, gauge head cavity can form confined space.
(2) gauge head installation and arrangement
Cleaning gauge head cavity and rubber base ring are needed before installation every time, guarantees cleaning and sealing effect；Gauge head 5 and detected concrete
Component 7 is connected by 6 gluing of rubber base ring, and installs concrete carbonization depth original position damage-free measuring apparatus；
For protection 7 purpose of detected concrete component, gauge head is installed on detected concrete component 7 using bonding mode by the present invention
Surface, such as conditions permit can also be used the auxiliary tools such as clamp and press gauge head to guarantee to survey to 7 surface of detected concrete component
Head is preferably bonded with test zone, to reach better seal effect.
When being related to the carbonation depth measurement of multiple tested regions, gauge head can be arranged in tested region one by one, when bonding is imitated
Fruit can carry out the pressurized operation (arranging sequencing according to gauge head) of next step when reliable, prevent pressure process gauge head 5 from falling off.
(3) increase and debugging of air pressure
According to the actual conditions of detected concrete component, suitable gauge head cavity volume is selected.High water-cement ratio, low intensive coagulation
Soil pores rate is generally higher, and gas permeability is also preferable, and biggish gauge head cavity volume can be selected；Conversely, then to select lesser
Gauge head cavity volume improves working efficiency to save the testing time.
The present invention promotes the sensibility of test by the way of adjusting cavity volume, and increasing can also be used in such as conditions permit
The mode of 5 floor space of gauge head (i.e. increase test zone) promotes the sensibility of test, according to the research achievement of related fields scholar, this
Two ways is effective, but further promotes effect using having no simultaneously.
After installing test device by Fig. 1 connection type, gauge head cavity volume is set as certain certain value, opens air compression
Machine 1 to air pressure reaches 1MPa, closes air compressor 1；Pressure regulator valve and air valve are opened, gas is conveyed to gauge head cavity by tracheae 8
Pressure, when pressure sensor shows that data reach predetermined pressure P0When (being less than 1MPa, unit: Pa), closing pressure-regulating valve 9 is gentle immediately
Valve 1, while the t that records the time0(unit: min).
(4) situation of change of air pressure is recorded in real time
The process of pressure sensor data decline is gauge head sky intracavity gas to the mistake spread inside detected concrete component 7
Journey records a certain moment t1Pressure P under (unit: min)1(unit: Pa) then may be used if 3 data variation of pressure sensor is excessively slow
Accelerate this process by way of reducing gauge head cavity volume in step 3, it should be noted that the volume is once fixed
It will no longer change later, to guarantee that the air transmission coefficient API at tested each position of component is obtained in identical conditions.
The present invention in such a way that pressure sensor 3 is connect with data actuation 4, real-time automatic recording gauge head cavity pressure with
The situation of change of time.Pressure sensor 3 is self-powered and signal amplifying function, and data actuation 4, which has, to be recorded and achieve in real time
The function of data.The response data of suitable sample frequency acquisition pressure sensor 3 is selected, it is optional when pressure change is very fast
Biggish sample frequency is selected, conversely, the optional lower numerical value of sample frequency.
3 range of pressure sensor and precision that the present invention uses are simultaneously not exclusive, are such as actually needed, can be used range it is bigger,
The higher pressure sensor 3 of precision.
Apparatus of the present invention consider automatic observation in real time, to deal with large batch of test job, not such as practical test job amount
It is big or not high to automatic Observation demand, it is contemplated that pressure changing to be recorded using pressure gauge, manually mode removes record gauge head
The air pressure change situation of cavity.
When testing is complete, pressure sensor 3 and data actuation 4 are closed, the connection between air valve 2 and pressure regulator valve 9 is disconnected,
Then air valve 2 is opened, gas extra in gauge head cavity is discharged, gauge head 5 is finally fetched.
(5) calculating of concrete component surface layer air transmission coefficient
According to diffusion theory of the gas in porous media, Surface layer's concrete air transmission coefficient can be obtained:
In above-mentioned formula, each symbolic significance embodies in the foregoing written description, repeats no more.According to step
Three and four record resulting data, can calculate the concrete air transmission coefficient API of tested region.
(6) functional relation of carbonation depth D Yu air transmission coefficient API are established
According to existing research, Surface layer's concrete air transmission coefficient API and carbonation depth D have preferable linear dependence, therefore, it is necessary to
Two groups of reference data (API1, D1), (API2, D2) establish corresponding functional relation.The acquisition of carbonation depth uses tradition side
Formula has lesser destructiveness, needs to assess the significance level and easy reparation degree of tested region, finally from numerous tested regions
In select 2 most suitable tested regions, carry out traditional concrete carbonization detection test.Each tested region hole number is 3
It is a, the carbonation depth of tested region is finally represented with the average value of the carbonation depth of 3 peep holes, the table obtained in conjunction with the 5th step
Layer concrete air transmission coefficient can establish the functional relation of carbonation depth D Yu air transmission coefficient API by way of linear fit
D=k*API+c, as the final basis for judging concrete carbonization depth and authority.
(7) concrete carbonization depth of concrete tested region is quantitatively evaluated
Each survey area concrete air transmission coefficient that 5th step is obtained brings the functional relation that the 6th step obtains into, and it is mixed to calculate each survey area
Coagulate the carbonation depth of soil.(the too small or mistake when there is respective regions carbonation depth calculated value compared to other regions obviously exception
Greatly), actual measurement verifying can be carried out by traditional detection method.
Embodiment 2
Remaining is same as Example 1 in addition to being equipped with thin layer rubber seal, the thin layer in 6 bottom surface of rubber base ring of the invention
Rubber seal connects (such as by way of bonding) removably with rubber base ring 6.
5 lower part of gauge head is connected with rubber base ring 6,6 bottom of rubber base ring by buckle-type in step (2) of the invention simultaneously
Thin layer rubber seal is removably installed, the table of the lower surface of thin layer rubber seal with detected concrete component 7
Face fits closely.Select can double face binding thin layer rubber seal, upper surface is bonded in 6 bottom of rubber base ring, and lower surface is viscous
It ties in 7 surface of detected concrete component, thin layer rubber seal should be close with rubber base ring 6 and 7 surface of detected concrete component
Fitting, prevents the gas in gauge head cavity exposed.
Above-described embodiment is for the principle of the present invention and its effect to be illustrated, but the present invention is not limited to above-mentioned
Embodiment.Those skilled in the art without departing from the spirit and scope of the present invention, in claims
It is interior, it modifies to above-described embodiment.Therefore protection scope of the present invention, should cover such as claims of the present invention.
Claims (10)
1. a kind of concrete carbonization depth original position damage-free measuring apparatus, it is characterised in that: including air compressor, air valve, pressure
Sensor, data actuation, gauge head, rubber base ring and pressure regulator valve, the gauge head lower section are equipped with rubber base ring, and the gauge head includes surveying
Head cavity and gauge head air inlet, described pressure sensor one end connect gauge head cavity, and the pressure sensor other end is adopted with number
System connection, the gauge head air inlet are connected by tracheae with air valve, and the air valve is connected by tracheae with air compressor, institute
It states air compressor and is connected by tracheae with pressure regulator valve, the pressure regulator valve is connected with air valve.
2. a kind of concrete carbonization depth original position as described in claim 1 damage-free measuring apparatus, it is characterised in that: the gauge head
It is connected with rubber base ring by buckle-type.
3. a kind of concrete carbonization depth original position as described in claim 1 damage-free measuring apparatus, it is characterised in that: the rubber
Base ring bottom surface is equipped with thin layer rubber seal, and the thin layer rubber seal is connected with rubber base ring by removably.
4. a kind of concrete carbonization depth original position as described in claim 1 damage-free measuring apparatus, it is characterised in that: the pressure
Sensor uses semiconductor transducer, range 0-1.0MPa, precision 0.1%FS.
5. a kind of concrete carbonization depth original position as described in claim 1 damage-free measuring apparatus, it is characterised in that: the gauge head
Cavity volume is adjustable.
6. a kind of concrete carbonization depth original position as described in claim 1 damage-free measuring apparatus, it is characterised in that: the gauge head
For stainless steel gauge head.
7. a kind of method using concrete carbonization depth original position as described in claim 1 damage-free measuring apparatus, feature exist
In including the following steps:
(1) concrete tested region pre-processes: selected tested region brushes away the cement serous coat of detected concrete component surface；
(2) gauge head is installed: the gauge head is connect with detected concrete component by rubber base ring gluing, and installs concrete carbon
Change depth original position damage-free measuring apparatus；
(3) pressurization and pressure regulation: after being bonded sufficiently to rubber base ring and surface of concrete structure, gauge head cavity volume is set, is beaten
It opens air compressor to air pressure and reaches 1MPa, close air compressor；Pressure regulator valve and air valve are opened, by tracheae to gauge head cavity
Conveying air pressure, when pressure sensor shows that data reach predetermined pressure P0When less than 1MPa, closing pressure-regulating valve and air valve immediately, together
When record the time t0；
(4) record air pressure changes with time situation: recording a certain moment t1Under pressure P1, the t1 is greater thant0；
(5) it calculates air transmission coefficient API: passing through formula, calculate the concrete air transmission coefficient of tested region
API；
(6) reference data for obtaining two groups of concrete carbonization depth D and air transmission coefficient API, establishes carbonation depth D and air transmission coefficient
Linear functional relation formula D=k*API+c of API；
(7) according to the API of step (5) and the functional relation of step (6), concrete carbonization depth is calculated.
8. a kind of concrete carbonization depth original position as claimed in claim 7 non-destructive measuring method, it is characterised in that: the step
(3) volume of setting cavity is selected according to the porosity of detected concrete component in, and porosity then selects greatly big gauge head cavity
Volume selects small gauge head cavity volume if porosity is small.
9. a kind of concrete carbonization depth original position as claimed in claim 7 non-destructive measuring method, which is characterized in that the step
(6) preferably: selecting 2 secondary tested regions, carry out concrete carbonization detection test, each tested region hole number is 3, most
The carbonation depth for being represented tested region with the average value of the carbonation depth of 3 peep holes eventually is obtained two groups of reference datas, is fitted
To linear function D=k*API+c, establish the mapping relations of carbonation depth and air transmission coefficient.
10. a kind of concrete carbonization depth original position as claimed in claim 7 non-destructive measuring method, it is characterised in that: the step
Suddenly gauge head lower part by buckle-type is connected with rubber base ring in (2), and rubber base ring bottom is removably equipped with thin
Layer rubber seal, the lower surface of the thin layer rubber seal is fitted closely with the surface of detected concrete component.
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