CN106841090A - One kind is based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose - Google Patents
One kind is based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000002329 infrared spectrum Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 15
- 239000003607 modifier Substances 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000003595 spectral effect Effects 0.000 claims abstract description 18
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 238000001228 spectrum Methods 0.000 claims abstract description 10
- 238000012937 correction Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000012986 modification Methods 0.000 claims abstract description 7
- 230000004048 modification Effects 0.000 claims abstract description 7
- 238000011088 calibration curve Methods 0.000 claims abstract description 6
- 239000011295 pitch Substances 0.000 claims description 73
- 239000010426 asphalt Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 9
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical class ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 4
- 229960002415 trichloroethylene Drugs 0.000 claims description 4
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000009262 Dracaena angustifolia Nutrition 0.000 description 1
- 240000007833 Dracaena angustifolia Species 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920005621 immiscible polymer blend Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
- G01N2021/3572—Preparation of samples, e.g. salt matrices
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Abstract
Comprised the following steps based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose the present invention relates to one kind：The SBS modified pitch samples for calibration curve are made, SBS modifier mass fraction is 3% to 6%；Compacting KBr compressing tablets；Make correcting sample；Scanned 16 times in transmitted infrared light spectrum, equipment bales catch removes background, parallel test is carried out 3 times；The baseline correction of infrared spectrum collection of illustrative plates, peak-seeking, 698cm‑1Place feature peak heights and 966cm‑1Place's characteristic peak high computational；The relation set up between SBS modifier spectral peak height and SBS dosage, forms SBS modifier Dose standard curve；SBS modified pitch to unknown dosage carries out 3 transmitted infrared light spectrum experiments；To the SBS modified pitch 698cm of unknown dosage‑1Place spectral peak height and 966cm‑1Place's respective average value of spectral peak height substitutes into SBS modifier dose modification curve respectively, obtains the modified agent dose of unknown dosage SBS modified pitch, and two peak heights finally are calculated with SBS modified pitch dosage averages as final result.
Description
Technical field
The invention belongs to SBS modified pitch Quality Control Technologies field, and in particular to one kind is based on the full mistake of SBS modified pitch
Journey calibrated shot infrared spectrum method for detecting dose.
Background technology
China's pitch assessment indicator system using needle penetration, softening point and ductility as primary evaluation index, in addition including pin
In-degree index, viscosity, brittle point, adhesion grade, bending creep stiffness, dynamic shear modulus and phase angle, pitch bursting stress and
Failure strain, aging rear mass loss, residual needle penetration, residual softening point, residual ductility etc..5 DEG C are proposed for modified pitch
The indexs such as ductility, pitch viscous toughness and isolation test.For SBS modified pitch, temperature-sensitive is mainly evaluated using penetration index
Property；Softening point, 60 DEG C of viscosity, equivalent softening point evaluate anti-low-temperature cracking to evaluate high-temperature stability, 5 DEG C of ductilities, equivalent brittle point
Property；Residual penetration ratio after rotary thin film in drying oven evaluates ageing resistace；Using 25 DEG C of elastic restoration evaluation elastic performances.
《Standard specification for construction and acceptance of highway asphalt pavement》(JTG F40-2004) is right respectively according to the characteristics of different modified asphalt
EVA, PE resinae, SBR rubber class and SBS thermoplastic elastomers are birdsed of the same feather flock together the different representative evaluations of compound modified pitch proposition
Index, it is main using softening because SBS political affairs pitch has high temperature higher, cryogenic property and good elastic recovery capability
Point, low-temperature ductility and rebound degree are used as evaluation index.
In the evaluation index of various countries, needle penetration, softening point, adhesiveness test method are identical with plain asphalt, rather than consider
The particularity of modified pitch.Technical indicator for modified pitch includes twist recovery, elasticity recovery, viscous toughness, repeated creep
Experiment, time sweep experiment, Critical fracture temperature and force ductility etc..
Standard empirical type index except more than, increasing chemical analysis method is applied to SBS modified asphalt technologies
In the evaluation of property.Because SBS modified pitch belongs to thermodynamics Immiscible Polymer Blends, SBS scattered uniformities, steady in pitch phase
The qualitative technological property for determining SBS modified pitch, the microstructure for studying SBS modified pitch is particularly important.Therefore it is big
Amount experiment is analyzed by fluorescence microscope, Electronic Speculum, gel chromatography, infrared spectrum, nuclear magnetic resonance and hot differential scanning calorimetry
Technology is each in chemical composition, the change of molecular weight, the SBS distribution situations of SBS modified pitch, and storage, ageing process to study
The situation of change of component, the relation between research SBS modified pitch microstructure and bitumen technology property.
Two kinds are broadly divided on SBS method for detecting dose in SBS modified pitch, one kind is according to SBS and matrix pitch
The difference of presence, glue content detection is carried out by chemical apparatuses such as infrared spectrometers；Another kind is according to SBS modified pitch rheologies
The rule that performance is presented with SBS doses changes, measures SBS dosage in unknown sample.
The fragrant surveys for proposing SBR contents in a kind of detection SBR modified pitch with infra-red sepectrometry of Zhejiang University Cai Ju in 1994
Method for testing, a certain proportion of SBR and pitch are directly dissolved when preparing sample using solvent, be have ignored SBR and are being modified with pitch
Interacted in journey；Hohai University Xiao Peng in 2005 etc. studies the blend mechanism of SBS modified pitch by infra-red sepectrometry, proposes
According to the feasibility of absorbance detection SBS dosage at SBS characteristic peaks, but specific detection method is not suggested that, and tested
Test specimen is prepared using pressed disc method in journey, error is larger in Sample Preparation Procedure；Chang An University's Li Wei light in 2010 etc. is used
Solwution method prepares sample, and the absorbance at SBS characteristic peaks is detected by infrared spectrometer, calculates SBS dosage, but error is higher,
Such as when SBS dosage is 2.0%, it is 5.46% to use infrared survey relative error, it is impossible to enough meet use requirement；2011 is older
Peace university woods outstanding person etc. uses film legal system each sample, by detecting the absorbance of SBS characteristic peaks, SBS is calculated with least square method
Dosage.
Chang An University's poplar morning sunlight in 2011 etc. proposes to be become in regular according to various dose SBS modified pitch viscosity-temperature curves figure
Change, the SBS modified pitch viscosity-temperature curves that oneself knows dosage are depicted as standard drawing, by contrasting the viscosity-temperature curve of unknown sample, calculate
SBS dosage in unknown sample；Liu in 2011 steps on force etc. and proposes according to various dose SBS modified pitch needle penetration-temperature curve in rule
The change of rule property, is depicted as standard drawing, by contrasting unknown sample by the SBS modified pitch needle penetration-temperature curve of known dose
Needle penetration-temperature curve, calculates SBS dosage in unknown sample.But it is up to the present, modified still without a generally acknowledged SBS is formed
Agent detection method.
The content of the invention
Present invention mainly solves in SBS modified pitch infrared spectrum processs of the test, SBS modified asphalt modifier accuracy of detection
The irrational problem of not high and sample production method.
SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose, bag are based on the invention provides one kind
Include following steps：
(1) the SBS modified pitch samples for calibration curve are made, SBS modifier mass fraction is 3% to 6%；
(2) KBr compressing tablets are suppressed；
(3) correcting sample is made；
(4) scanned 16 times in transmitted infrared light spectrum, equipment bales catch removes background, parallel test is carried out 3 times；
(5) baseline correction of infrared spectrum collection of illustrative plates, peak-seeking, 698cm-1Place feature peak heights and 966cm-1Place's feature peak heights
Calculate；
(6) relation set up between SBS modifier spectral peak height and SBS dosage, forms SBS modifier Dose standard bent
Line；
(7) the SBS modified pitch to unknown dosage carries out 3 transmitted infrared light spectrum experiments；
(8) to the SBS modified pitch 698cm of unknown dosage-1Place spectral peak height and 966cm-1Place's spectral peak height is each
Average value substitute into SBS modifier dose modification curve respectively, obtain the modified agent dose of unknown dosage SBS modified pitch, most
Two peak heights are calculated with SBS modified pitch dosage afterwards to average as final result.
Preferably, in step (1), the SBS modified pitch samples that mass fraction is 3%, 4%, 5%, 6% are prepared respectively,
Contain first and take 4 parts of 1kg matrix pitches, after matrix pitch is heated to 180 DEG C, be separately added into asphalt quality 3%, 4%, 5%, 6%
SBS modifier, normal agitation machine stir 30~60min, then with high-speed shearing machine shear 30~60min, finally develop 30
~60min.
Preferably, in step (3), before sample is made, KBr piece backgrounds are scanned first, background is deducted during experiment；
The SBS modified pitch for taking 1~10g various doses is contained respectively, is fully dissolved with 10~100ml trichloro ethylenes, reuse liquid-transfering gun
20~200ul cold primer-oils are injected on KBr pieces, the circles of circumference rotation 3~10 are then carried out with the angle at 30~300 degree of inclination angle,
SBS modified asphalt solutions are made fully to infiltrate KBr pieces；It is last to be dried 1~2 minute under infrared lamp, trichloro ethylene is fully volatilized.
Preferably, in step (5), baseline correction, peak-seeking, peak height calculating are carried out to test spectral with Origin softwares,
698cm-1Place feature peak heights and 966cm-1The difference of the indivedual values of place's feature peak heights and average value must not exceed the 20% of average value
~50%, when the requirement for there are data more than 20%~50%, complementary testing is carried out, until meeting the requirements.
Preferably, in step (8), if 698cm-1Place and 966cm-1Respective 3 peak heights is indivedual in place spectral signature peak
The difference of value and average value no more than the 20%~50% of average value, then average and be modified as the SBS of unknown dosage by data
The peak height at pitch correspondence peak, if the difference of a numerical value and average value increases more than the 20%~50% of average value in detection
Test number (TN), then select 2 numerical value to be judged again with having tested in 3 data, until indivedual values and average value of 3 data
Difference no more than average value 20%~50% untill.
The present invention has the advantages that compared with prior art：A kind of infrared spectrum based on overall process calibrated shot
SBS modified pitch method for detecting dose, overcomes the not specification of different researchers' making samples in infrared spectrum process of the test
Property, overcome the printing opacity that different tests personnel's SBS modified pitch sample is produced using heated bitumen semar technique, cold primer-oil coating method
Property is uneven or light tight and the difference of infrared spectrum optical path difference that causes, and then causes the huge variation of infrared spectrum peak height.Together
When, the degree of variation of control SBS modifier feature peak height is required using precision control, further increase SBS modified pitch
The accuracy in detection of dosage.The processing method is simple, effectively, can spread use.
Brief description of the drawings
Fig. 1 is baseline correction curve map.
Fig. 2 is the graph of a relation of the SBS modified pitch characteristic peak with SBS modifier dosage of various dose.
Specific embodiment
One kind is based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose, comprises the following steps：
(1) 3%, 4%, 5%, 6% SBS modified pitch samples are prepared respectively, for making calibration curve.Contain first and take
4 parts of 1kg matrix pitches, after matrix pitch is heated to 180 DEG C, the SBS for being separately added into asphalt quality 3%, 4%, 5%, 6% is modified
Agent, normal agitation machine stirs 30~60min, then shears 30~60min with high-speed shearing machine, finally develops 30~60min.
(2) KBr compressing tablets.The KBr for taking 10~100mg drying is contained with a ten thousandth balance, KBr is suppressed on tablet press machine
Piece.
(3) making of correcting sample.Before sample is made, KBr piece backgrounds are scanned first, this is deducted during experiment
Bottom.Contain the SBS modified pitch for taking 1~10g various doses respectively with a ten thousandth balance, filled with 10~100ml trichloro ethylenes
Divide dissolving, reuse the quantitative liquid-transfering gun of micro updating and 20~200ul cold primer-oils are injected on KBr pieces, then manually with inclination angle 30
~300 degree of angle carries out circumference rotation 3~10 and encloses, and SBS modified asphalt solutions is fully infiltrated KBr pieces.Finally in infrared lamp
It is lower to dry 1~2 minute, trichloro ethylene is fully volatilized.
(4) scanned 16 times in transmitted infrared light spectrum, used as a test result, equipment bales catch removes background.Parallel examination
Testing is carried out 3 times.
(5) baseline correction, peak-seeking, peak height calculating are carried out to test spectral with Origin softwares, in 698cm-1Place's feature
Peak heights and 966cm-1The difference of place's indivedual values of feature peak heights and respective average value must not exceed the 20%~50% of average value, such as
There is requirement of the data more than 20%~50%, then need complementary testing.
(6) relation set up between SBS modifier spectral peak height and SBS dosage, forms SBS modifier dose modification bent
Line.
(7) the SBS modified pitch to unknown dosage carries out 3 transmitted infrared light spectrum experiments, if 698cm-1Place with
966cm-1Place's spectrum peak height each individually the difference of value and average value no more than the 20%~50% of average value, then data are averaged
It is worth the peak height as the SBS modified pitch dosage of unknown dosage, if the difference of a numerical value and average value is more than average in detection
The 20%~50% of value, then increase test number (TN), then selects 2 numerical value to be judged again with having tested in 3 data, until 3
Indivedual values of individual data and the difference of average value no more than average value 20%~50% untill.
(8) to the SBS modified pitch 698cm of unknown dosage-1Place spectral peak height and 966cm-1Place's spectral peak height is average
Value substitutes into SBS modifier dose modification curve and can obtain the modified agent dose of unknown dosage SBS modified pitch.Finally to two peaks
Height calculates SBS modified pitch dosage and averages as final result.
Specifically, dissolving SBS modified pitch, secondly, system as the solvent of SBS modified pitch with trichloro ethylene first
Make the good KBr pieces of translucency, again, using quantitative liquid-transfering gun injection by the way of on the KBr pieces of horizontal positioned calibrated shot SBS
Modified asphalt solutions, rotate 3~10 and enclose at a certain angle, and infrared lamps are passed through 1~2 minute after horizontal, finally, carry out infrared
Spectral scan, baseline calibration, deduction baseline, measure 698cm-1Place feature peak heights and 966cm-1Place's feature peak heights.In Fig. 1
The top curve is original infrared spectrum collection of illustrative plates, and the curve that centre is relaxed is baseline, and following surface curve is to deduct the light after baseline
Spectrogram.
By after baseline correction, to the SBS modified pitch infrared spectrum elevation measurements of various dose, using " indivedual values with
The principle of 20%~50% of the difference of average value more than average value ", selects satisfactory 3 numerical value, averages, and finally paints
Standards calibration curve processed, is shown in Fig. 2.
Demarcate dosage and substitute into calibration curve, calculate 698cm-1Place, 966cm-1Deduct baseline, indivedual Value Data deviations and take in place
Actual measurement dosage, absolute error, the relative error of the actual measurement SBS dosage after house, are shown in Table 1, table 2.
The 698cm of table 1-1Deduct the peak height calculated value after baseline, deviation accept or reject data in place
The 966cm of table 2-1Deduct the peak height calculated value after baseline, deviation accept or reject data in place
Be worth individually using peak height and average value the not super average value of difference 20%~50% requirement rejecting abnormalities data after,
698cm-1Locate determine SBS modifier dosage absolute error be -0.2%~+0.1%, relative error be -4.0%~+
1.7%；966cm-1The absolute error for locating the SBS modifier dosage of measure is -0.2%~+0.1%, and relative error is -4.0%
~+3.3%.Theoretical according to error propagation, the SBS dosage absolute error of this determination of test method is -0.2%~+0.1%, phase
It is -4.0%~+2.5% to error.Transmitted spectrum is unable to accurate application in the modified drips of SBS during the method substantially breaches document
The problem of blue or green dose measurement, and overall process calibrated shot infrared spectroscopic determination result has, and measure relative error is small, calculate knot
The characteristics of fruit high precision, can be used for the quality control of scene and laboratory's SBS modifier dosage.
It is understood that above is example in order to illustrate principle of the invention and exploitativeness, the present invention not office
It is limited to this.For those skilled in the art, without departing from the spirit and substance in the present invention, can be with
All variations and modifications are made, these variations and modifications are also considered as protection scope of the present invention.
Claims (5)
1. it is a kind of to be based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose, it is characterised in that including with
Lower step：
(1) the SBS modified pitch samples for calibration curve are made, SBS modifier mass fraction is 3% to 6%；
(2) KBr compressing tablets are suppressed；
(3) correcting sample is made；
(4) scanned 16 times in transmitted infrared light spectrum, equipment bales catch removes background, parallel test is carried out 3 times；
(5) baseline correction of infrared spectrum collection of illustrative plates, peak-seeking, 698cm-1Place feature peak heights and 966cm-1Place's characteristic peak high computational；
(6) relation set up between SBS modifier spectral peak height and SBS dosage, forms SBS modifier Dose standard curve；
(7) the SBS modified pitch to unknown dosage carries out 3 transmitted infrared light spectrum experiments；
(8) to the SBS modified pitch 698cm of unknown dosage-1Place spectral peak height and 966cm-1Place's spectral peak height is respective flat
Average substitutes into SBS modifier dose modification curve respectively, obtains the modified agent dose of unknown dosage SBS modified pitch, finally right
Two peak heights calculate SBS modified pitch dosage and average as final result.
2. according to claim 1 based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose, its
It is characterised by, in step (1), the SBS modified pitch samples that mass fraction is 3%, 4%, 5%, 6% is prepared respectively, contains first
4 parts of 1kg matrix pitches are taken, after matrix pitch is heated to 180 DEG C, the SBS for being separately added into asphalt quality 3%, 4%, 5%, 6% changes
Property agent, normal agitation machine stir 30~60min, then with high-speed shearing machine shear 30~60min, finally develop 30~60min.
3. according to claim 1 and 2 based on SBS modified pitch overall process calibrated shot infrared spectrums dose measurement side
Method, in step (3), before sample is made, is scanned to KBr piece backgrounds first, and background is deducted during experiment；Contain respectively and take 1~
The SBS modified pitch of 10g various doses, is fully dissolved with 10~100ml trichloro ethylenes, is reused liquid-transfering gun and is noted on KBr pieces
20~200ul cold primer-oils are penetrated, then carrying out circumference rotation 3~10 with the angle at 30~300 degree of inclination angle encloses, and makes the modified drips of SBS
Blue or green solution fully infiltrates KBr pieces；It is last to be dried 1~2 minute under infrared lamp, trichloro ethylene is fully volatilized.
4. according to claim 3 based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose, step
Suddenly in (5), baseline correction, peak-seeking, peak height calculating, 698cm are carried out to test spectral with Origin softwares-1Place's feature peak heights
With 966cm-1The difference of the indivedual values of place's feature peak heights and average value must not exceed the 20%~50% of average value, exceed when there is data
During 20%~50% requirement, complementary testing is carried out, until meeting the requirements.
5. according to claim 4 based on SBS modified pitch overall process calibrated shot infrared spectrum method for detecting dose, step
Suddenly in (8), if 698cm-1Place and 966cm-1Indivedual values of respective 3 peak heights and the difference of average value are equal in place spectral signature peak
No more than the 20%~50% of average value, then data average the peak height as the SBS modified pitch correspondence peak of unknown dosage,
If the difference of a numerical value and average value is more than the 20%~50% of average value in detection, increase test number (TN), then with surveyed
2 numerical value are selected to be judged again in 3 data of examination, until the difference of indivedual values of 3 data and average value is no more than average
Untill the 20%~50% of value.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169164A (en) * | 2017-12-22 | 2018-06-15 | 江苏中路工程技术研究院有限公司 | It is a kind of that the method that trichloro ethylene is remained in recycling pitch is detected using FTIR |
| CN112986295A (en) * | 2021-02-04 | 2021-06-18 | 中国铝业股份有限公司 | X-ray fluorescence spectrum determination tabletting sample of asphalt and sample preparation method thereof |
| CN114112889A (en) * | 2021-12-31 | 2022-03-01 | 中国路桥工程有限责任公司 | Asphalt anti-aging performance evaluation method based on phase angle main curve |
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| CN114112889A (en) * | 2021-12-31 | 2022-03-01 | 中国路桥工程有限责任公司 | Asphalt anti-aging performance evaluation method based on phase angle main curve |
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