CN107576619A - Detect EO-1 hyperion test and the analysis method of concrete erosion product - Google Patents
Detect EO-1 hyperion test and the analysis method of concrete erosion product Download PDFInfo
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Abstract
The invention discloses a kind of spectrum test and analysis method for detecting concrete erosion product, comprise the following steps：(S1) library of spectra of concrete raw material, hydrated product, corrosion product is established；(S2) according to detection object property, the technical parameter of spectra collection is determined；(S3) the detection target optical spectral data collection under varying environment；(S4) pretreatment of measured spectra curve and characteristic parameter extraction；(S5) curve of spectrum ratio is handled with derivation, the analysis of detection object corrosion products generating process.The present invention utilizes hyperspectral measurement technology, spectra collection is carried out to standard curing and solution corrosion Under Concrete damage deterioration process using portable spectrometer, after the processing such as Wavelet Denoising Method, envelope removal, difference of the different larval instar from spectral signature under different etching conditions is analyzed by ratio spectro-derivative spectrophotometry；Concrete dilatancy product abundance under etchant solution is detected, meets the needs of concrete erosion product Non-Destructive Testing.
Description
Technical field
The present invention relates to the non-destructive testing technology of concrete, specifically a kind of EO-1 hyperion for detecting concrete erosion product is surveyed
Examination and analysis method.
Background technology
The non-destructive testing technology of concrete is detected on the premise of concrete structure is not destroyed, and obtaining people most needs
The concrete physical quantity information wanted and by information digitalization, image conversion processing, finds the various defects being likely to occur in engineering, solution
Certainly produced problem in engineering.Currently used concrete nondestructive testing technology is typically that reinforced concrete structure entity is mixed
The ginsengs such as solidifying native intensity, defect (compactness, crack, New-old concrete composition surface, weaker zone etc.), reinforcement location (diameter can be estimated)
Number is detected.
Concrete structure, can be by various complicated mechanical functions and chemical action, especially during being actually on active service
It is chemical attack effect, concrete performance can be had an impact.For the research of chemistry of concrete corrosion, generally use scanning electricity
The methods of mirror, power spectrum, XRD diffraction, carries out micro-analysis, evaluation material structure durability, security.But these methods generally need
Concrete is sampled, so as to generate destruction to concrete structure, and need stationarity system equipment, detection cycle
Also it is long, poor continuity.And for existing RC structures, it is impossible to divide a large amount of samples of offer in cycle to be damaged
Detection.
Hyperspectral technique had been widely used for food inspection deciding grade and level, agricultural investigation monitoring and chemical industry measurement analysis in recent years
Deng field, true and false quick detection, crops quality analysis and the soil mineral composition dynamic detection of such as grease.Using EO-1 hyperion
Test and analysis method can directly perceived, easy, the lossless corrosion product generating process to concrete be used for quickly detecting, this side
Method is the useful supplement to concrete erosion product non-destructive testing technology, and the research to concrete performance has great importance.
The content of the invention
Present invention seek to address that above mentioned problem existing for existing concrete lossless detection method, and a kind of detection coagulation is provided
The EO-1 hyperion test of native corrosion product and analysis method, this method have non-contact, Non-Destructive Testing advantage, can be to different rings
Concrete under border in time, it is accurate, repeat continuous Non-Destructive Testing.
The present invention solves the technical scheme that its technical problem uses：
A kind of EO-1 hyperion test for detecting concrete erosion product and analysis method, are carried out according to the following steps：
Step 1：Establish the library of spectra of concrete raw material, hydrated product, corrosion product；
Step 2：According to detection object property, the technical parameter of spectra collection is determined；
Step 3：Detection target optical spectral data collection under varying environment；
Step 4：Measured spectra curve pre-processes and characteristic parameter extraction；
Step 5：Curve of spectrum ratio is handled with derivation, the analysis of detection object corrosion products generating process.
Using the present invention of above-mentioned technical proposal, compared with prior art, beneficial effect is：
(1) there is non-contact, Non-Destructive Testing advantage, continuous monitoring can be repeated under maintenance or corrosive environment, is one
Timely, accurate, the continuous lossless detection method of kind.
(2) hyperspectral measurement technology is utilized, using portable spectrometer to coagulation under the conditions of standard curing and solution corrosion
Soil damage deterioration process carries out spectra collection, after the processing such as Wavelet Denoising Method, envelope removal, passes through ratio spectro-derivative spectrophotometry
Analyze difference of the different larval instar from spectral signature under different etching conditions；It is rich to detect concrete dilatancy product under etchant solution
Degree, meet the needs of concrete erosion product Non-Destructive Testing.
Preferably, the further technical scheme of the present invention is：
Comprise the following steps in the step 1：
(1) the related curve of spectrum of concrete is gathered：Using spectrometer collection concrete raw material include cement, sand,
Stone, water, water reducer, the curve of spectrum of mineral admixture；The curve of spectrum of hydrated product under the conditions of collection concrete is non-corrosive；
The curve of spectrum of product is generated under the conditions of collection concrete erosion；
(2) curve of spectrum of concrete raw material, hydrated product, corrosion product is carried out at envelope removal and normalization
Reason, extracts the characteristic parameter of raw material measured spectra curve, and characteristic parameter includes absorbing position P, absorbs depth H, absorbs width
W, symmetry B, absorption area S are absorbed.
Comprise the following steps in the step 2：
(1) the concrete B under the Concrete and corrosive environment under corrosion-free environment is chosen in detection object as detection
Point；
(2) design monitoring total time long S and spectra collection cycle T, spectral measurement total degree N=S/T；
(3) spectra collection sample dry and wet degree, monitoring point number and position during single spectra collection, collection are determined most
Small distance, observation frequency parameter.
Comprise the following steps in the step 3：
(1) the concrete B to the Concrete under corrosion-free environment, under corrosive environment carries out uninterrupted n times spectral measurement；
(2) if Concrete ith spectra collection is the average value for doing spectral measurement, i.e. Ki(i=1,2,3 ... ...,
N)；
(3) if concrete B ith spectra collections are the average value for doing spectral measurement, i.e. Li(i=1,2,3 ... ...,
N)。
Comprise the following steps in the step 4：
(1) it is smooth to measured spectra curve Wavelet Denoising Method, remove envelope；
(2) curve that Concrete removes after envelope processing is SKi, B object removals envelope processing after curve be
SLi；
(3) the Absorption Characteristics parameter of spectral profile is extracted, characteristic parameter is wide including absorption position P, absorption depth H, absorption
Spend W, absorb symmetry B, absorption area S, determine the spectral absorption characteristics section of detection object.
Comprise the following steps in the step 5：
(1) Concrete and the curve of spectrum ratio proccessing of concrete B same monitoring times i：The curve of spectrum(i=1,2,3 ... ..., N)；
(2) by the curve of spectrumMatched with corrosion products standard spectrum database, be fitted analysis；
(3) to the curve of spectrumCarry out derivation, the generation quantitative analysis of detection object corrosion products.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of the present invention；
Fig. 2 is gypsum and entringite spectral mixture curve；
Fig. 3 is the curve of spectrum after Concrete, B measured spectras curve removal envelope；
Fig. 4 is that each age ratio removes the curve of spectrum with envelope after derivation；
Fig. 5 is that the curve of spectrum is matched somebody with somebody with concrete erosion product spectrum area after ratio.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples, in order to be best understood from the technical scheme of invention,
Now principle is derived in conjunction with specific embodiments as follows：
Material and mixing ratio.As shown in table 1, preparing concrete raw materials includes cement, flyash, miberal powder, thin
Aggregate, coarse aggregate, water, water reducer.Cement is the PO42.5 normal silicates of Jidong Cement Co., Ltd., Tangshan's production
Cement；Flyash is II grade of ash；Miberal powder is to use blast furnace slag；Water reducer is polycarboxylic acid series high efficiency water reducing agent；Fine aggregate is
Natural river sand；Coarse aggregate is 5~20mm continuous grading rubbles.
Concrete mix (the kg/m of table 13)
The preparation of experiment concrete test block.16 pieces of 100mm × 100mm × 100mm concrete cube examination is made altogether
Block, strength grade of concrete C30.After fog room standard curing 28d, it is divided to two groups of A, B (every group 8 pieces) to carry out corrosion examination respectively
Test, A group test blocks, which are put into clear water, soaks, and B group test blocks are put into the Na that mass percent is 10%2SO4Soaked in solution, immersion side
Formula is complete immersion.
Establish concrete erosion generation product spectrum indicatrix.Concrete test block is put under the conditions of clear water, can generate water
Change the component such as calcium silicates and calcium hydroxide.When concrete is put into Na2SO4In solution, except hydrated calcium silicate and calcium hydroxide can be given birth to
Outside etc. component, the generation dilatancy product such as gypsum and entringite can be also reacted.Gypsum and entringite spectral mixture curve such as Fig. 2
It is shown.
Determine the technical parameter of spectra collection.Spectral signature experiment using Beijing An Zhou SR-2500 removably object lights
Spectrometer, 350~2500nm of its detecting light spectrum scope.Experiment is carried out in darkroom, and concrete test block surface is dried, is placed on paving
On the desk for having black flannelette, using Halogen lamp LED as solar simulator.Reference white plate is horizontal positioned during measurement, probe distance
Object being measured height about 15cm, the normal angle with horizontal plane is within 10 °.In order to suppress ambient noise, each sample is adopted
Collect 10 data, after rejecting abnormalities value, average as last spectrum.
Spectra collection pre-processes with the curve of spectrum.Respectively under the conditions of A, B gather soak time be 30d, 60d, 75d,
90d, 105d, 120d concrete reflection spectrum curve.Average is taken to the multiple measure spectrum curve of each sample, it is bent to spectrum
Line smothing filtering method.Then the resampling at intervals of 1nm, the curve of spectrum after resampling are carried out to 400nm~2500nm wave bands
Carry out envelope elimination.Concrete, B 60d, 120d measured spectra curve remove envelope after the curve of spectrum such as Fig. 3 show.
Characteristic parameter extracts after measured spectra curve processing.Spectral absorption characteristics parameter is shown in Table 2.
The spectral absorption characteristics parameter of table 2
Curve of spectrum ratio is handled with derivation.A, the same monitoring time collection curve of spectrum ratio proccessings of B, obtain B120/
A120 curves, as shown in Figure 4.
B120/A120 spectral profiles after ratio are matched with the spectrum database of corrosion products gypsum and entringite, entered
Row Fitting Analysis, as shown in Figure 5.Quantitative analysis is carried out, as shown in table 3.From table 3 it can be seen that B120/A120 spectrum after ratio
Curve has reached 0.932 in wave spectrum angle (SAM) degree of fitting of spectrum range 1704-1833nm and the gypsum curve of spectrum, highlights
The characteristic peaks of gypsum；The B120/A120 curves of spectrum are in spectrum range 1352-1654nm, 1704-1833nm, 1857- after ratio
2080nm and the entringite curve of spectrum wave spectrum angle (SAM) degree of fitting have reached more than 0.968, illustrate that entringite produces in corrosivity
Absolute predominance is accounted in thing, spectral signature is obvious.In addition, the B120/A120 curves of spectrum and gypsum, the light of entringite after ratio
The result of spectral curve fitting (SFF) has reached more than 0.919, and the B120/A120 curves of spectrum are gypsum and calcium after illustrating ratio
The superposition of the aluminite curve of spectrum, spectral signature are obvious.
The B120/A120 of table 3 and entringite, gypsum curve of spectrum Fitting Analysis
Therefore, EO-1 hyperion test can detect the generation of concrete erosion product with analysis method.
Claims (6)
1. a kind of EO-1 hyperion test for detecting concrete erosion product and analysis method, are carried out according to the following steps：
Step 1：Establish the library of spectra of concrete raw material, hydrated product, corrosion product；
Step 2：According to detection object property, the technical parameter of spectra collection is determined；
Step 3：Detection target optical spectral data collection under varying environment；
Step 4：Measured spectra curve pre-processes and characteristic parameter extraction；
Step 5：Curve of spectrum ratio is handled with derivation, the analysis of detection object corrosion products generating process.
2. EO-1 hyperion test and the analysis method of detection concrete erosion product according to claim 1, it is characterised in that
Comprise the following steps in the step 1：
(1) the related curve of spectrum of concrete is gathered：Using spectrometer collection concrete raw material include cement, sand, stone,
Water, water reducer, the curve of spectrum of mineral admixture；The curve of spectrum of hydrated product under the conditions of collection concrete is non-corrosive；Collection
The curve of spectrum of product is generated under the conditions of concrete erosion；
(2) envelope removal and normalized are carried out to the curve of spectrum of concrete raw material, hydrated product, corrosion product,
The characteristic parameter of raw material measured spectra curve is extracted, characteristic parameter includes absorbing position P, absorbs depth H, absorb width W, inhale
Receive symmetry B, absorption area S.
3. EO-1 hyperion test and the analysis method of detection concrete erosion product according to claim 1, it is characterised in that
Comprise the following steps in the step 2：
(1) the concrete B under the Concrete and corrosive environment under corrosion-free environment is chosen in detection object as test point；
(2) design monitoring total time long S and spectra collection cycle T, spectral measurement total degree N=S/T；
(3) spectra collection sample dry and wet degree, monitoring point number and position during single spectra collection, collection most narrow spacing are determined
From, observation frequency parameter.
4. EO-1 hyperion test and the analysis method of detection concrete erosion product according to claim 1, it is characterised in that
Comprise the following steps in the step 3：
(1) the concrete B to the Concrete under corrosion-free environment, under corrosive environment carries out uninterrupted n times spectral measurement；
(2) if Concrete ith spectra collection is the average value for doing spectral measurement, i.e. Ki(i=1,2,3 ... ..., N)；
(3) if concrete B ith spectra collections are the average value for doing spectral measurement, i.e. Li(i=1,2,3 ... ..., N).
5. EO-1 hyperion test and the analysis method of detection concrete erosion product according to claim 1, it is characterised in that
Comprise the following steps in the step 4：
(1) it is smooth to measured spectra curve Wavelet Denoising Method, remove envelope；
(2) curve that Concrete removes after envelope processing is SKi, the curve after the processing of B object removals envelope is SLi；
(3) extract the Absorption Characteristics parameter of spectral profile, characteristic parameter include absorbing position P, absorb depth H, absorb width W,
Symmetry B, absorption area S are absorbed, determines the spectral absorption characteristics section of detection object.
6. EO-1 hyperion test and the analysis method of detection concrete erosion product according to claim 1, it is characterised in that
Comprise the following steps in the step 5：
(1) Concrete and the curve of spectrum ratio proccessing of concrete B same monitoring times i：The curve of spectrum
(2) by the curve of spectrumMatched with corrosion products standard spectrum database, be fitted analysis；
(3) to the curve of spectrumCarry out derivation, the generation quantitative analysis of detection object corrosion products.
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| CN108286962A (en) * | 2018-01-31 | 2018-07-17 | 中国科学院遥感与数字地球研究所 | A kind of method for building up and system of water environment library of spectra |
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| CN113177909A (en) * | 2021-04-01 | 2021-07-27 | 华侨大学 | Multi-mode visual detection method and system for recycled aggregate with mortar on surface |
| CN113177909B (en) * | 2021-04-01 | 2023-06-20 | 华侨大学 | Multi-mode visual detection method and system for recycled aggregate with mortar on surface |
| CN117435940A (en) * | 2023-12-20 | 2024-01-23 | 龙建路桥股份有限公司 | Spectrum detection method for winter concrete curing process |
| CN117435940B (en) * | 2023-12-20 | 2024-03-05 | 龙建路桥股份有限公司 | Spectrum detection method for winter concrete curing process |
| CN117740663A (en) * | 2024-02-21 | 2024-03-22 | 中冶建筑研究总院（深圳）有限公司 | Method, system and device for evaluating sulfate erosion durability of concrete structure |
| CN117740663B (en) * | 2024-02-21 | 2024-06-04 | 中冶建筑研究总院（深圳）有限公司 | Method, system and device for evaluating sulfate erosion durability of concrete structure |
| CN117969535A (en) * | 2024-04-01 | 2024-05-03 | 黑龙江省泰斯特森工程检测有限公司 | Road bridge concrete defect nondestructive testing method and system |
| CN117969535B (en) * | 2024-04-01 | 2024-06-07 | 黑龙江省泰斯特森工程检测有限公司 | Road bridge concrete defect nondestructive testing method and system |
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