CN109709060A - A kind of measuring method of asphalt softening point, needle penetration and mass loss - Google Patents
A kind of measuring method of asphalt softening point, needle penetration and mass loss Download PDFInfo
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- CN109709060A CN109709060A CN201910089101.3A CN201910089101A CN109709060A CN 109709060 A CN109709060 A CN 109709060A CN 201910089101 A CN201910089101 A CN 201910089101A CN 109709060 A CN109709060 A CN 109709060A
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Abstract
The present invention provides a kind of asphalt softening point, needle penetration and the measuring methods of mass loss, belong to road engineering applied technical field.Test method provided by the invention includes the following steps: the characterisitic parameter of test modeling group asphalt sample, and acquires the infrared spectrogram of modeling group asphalt sample；The characterisitic parameter is softening point, needle penetration or mass loss；Quantitative Analysis Model is established using the spectral information within the scope of the characterisitic parameter and corresponding characteristic wavelength of modeling group asphalt sample；The infrared spectrogram for acquiring asphalt sample to be measured obtains the characteristic parameter value of asphalt sample to be measured in conjunction with Quantitative Analysis Model according to the spectral information in gained infrared spectrogram within the scope of the corresponding characteristic wavelength of characterisitic parameter.Test method provided by the invention can be operated in room temperature, and have time-consuming short advantage.
Description
Technical field
The present invention relates to road engineering applied technical field more particularly to a kind of asphalt softening points, needle penetration and quality damage
The measuring method of mistake.
Background technique
Influence of the pitch to road quality is huge, and China Asphalt market makes there are still underproof asphaltic products according to investigations
It is happened occasionally with the phenomenon that fake and forged pitch.Identify pitch, traditional simple physical property detection method not only takes time and effort, and easily
It is influenced by additives such as modifying agent and stabilizers, test result is easy distortion.Due to the complexity of pitch chemical property, pitch
Specification is developed to be tested for physical characteristic, is tested using needle penetration, softening point, ductility etc., the test of these physical characteristics
It is carried out under standard test temperature, test result is used to determine whether material meets the standard of specification, and three big performance indicators are
The traditional detection method of asphalt performance is judged, shirtsleeve operation is that other methods are not replaced, so far and highway industry
Detect the main method of pitch.Three big performance indicators are although easy to operate, but pitch will dissolve in advance, and Cong Chengmo, health are arrived
The time of test is up to 4,5 hours, takes a long time, can not timely and effectively judge the quality of pitch.
Summary of the invention
The purpose of the present invention is to provide a kind of asphalt softening point, needle penetration and the measuring method of mass loss, the present invention
The measuring method of offer can be carried out in room temperature, and the testing time is short.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of asphalt softening point, needle penetration and the measuring methods of mass loss, include the following steps:
The characterisitic parameter of test modeling group asphalt sample, and acquire the infrared spectrogram of modeling group asphalt sample；The spy
Property parameter be softening point, needle penetration or mass loss；
It is established using the spectral information within the scope of the characterisitic parameter and corresponding characteristic wavelength of modeling group asphalt sample quantitative
Analysis model；
The infrared spectrogram for acquiring asphalt sample to be measured, according to the corresponding characteristic wave of characterisitic parameter in gained infrared spectrogram
Spectral information in long range obtains the characteristic parameter value of asphalt sample to be measured in conjunction with Quantitative Analysis Model.
Preferably, the modeling group includes 20 kinds or more asphalt samples.
Preferably, the characterisitic parameter of the modeling group asphalt sample uses standard No. public for the standard of JTG E-20-2011
The method opened measures.
Preferably, the acquisition condition of the infrared spectrogram are as follows: 4000~10000cm of spectral scanning range-1, scanning times
128 times.
Preferably, after acquiring the infrared spectrogram of modeling group asphalt sample and the infrared spectrogram of asphalt sample to be measured, also
Including pre-processing to gained infrared spectrogram, the pretreatment includes background deduction, smoothing processing and the base successively carried out
Line correction process.
Preferably, the corresponding characteristic wavelength range of the softening point is 4204.06~4373.76cm-1；The needle penetration pair
The characteristic wavelength range answered is 4448.34~4785.48cm-1, 4836.99~5342.71cm-1With 5333.34~
6063.82cm-1；The corresponding characteristic wavelength range of the mass loss is 4180.92~6024.53cm-1。
Preferably, the Quantitative Analysis Model is established using TQ Analyst spectral analysis software.
Preferably, the characteristic parameter value of the asphalt sample to be measured is calculated using TQ Analyst spectral analysis software.
The present invention provides a kind of asphalt softening point, needle penetration and the measuring methods of mass loss, include the following steps: to survey
The characterisitic parameter of modeling group asphalt sample is tried, and acquires the infrared spectrogram of modeling group asphalt sample；The characterisitic parameter is soft
Change point, needle penetration or mass loss；Utilize the light within the scope of the characterisitic parameter and corresponding characteristic wavelength of modeling group asphalt sample
Spectrum information establishes Quantitative Analysis Model；The infrared spectrogram for acquiring asphalt sample to be measured, according to characteristic in gained infrared spectrogram
Spectral information within the scope of the corresponding characteristic wavelength of parameter obtains the characteristic ginseng of asphalt sample to be measured in conjunction with Quantitative Analysis Model
Numerical value.The present invention is by characteristic wavelength model in the characterisitic parameter (softening point, needle penetration and mass loss) of pitch and infrared spectrogram
The spectral information enclosed establishes Quantitative Analysis Model, then by the infrared spectrogram of acquisition sample to be tested, in conjunction with quantitative analysis mould
Type obtains the characteristic parameter value of asphalt sample to be measured, can be operated in room temperature, and has time-consuming short advantage.
Detailed description of the invention
Softening point measured value-calculated value correlation curve that Fig. 1 embodiment 1 obtains；
Needle penetration measured value-calculated value correlation curve that Fig. 2 embodiment 1 obtains；
Mass loss measured value-calculated value correlation curve that Fig. 3 embodiment 1 obtains.
Specific embodiment
The present invention provides a kind of asphalt softening point, needle penetration and the measuring methods of mass loss, include the following steps:
The characterisitic parameter of test modeling group asphalt sample, and acquire the infrared spectrogram of modeling group asphalt sample；The spy
Property parameter be softening point, needle penetration or mass loss；
It is established using the spectral information within the scope of the characterisitic parameter and corresponding characteristic wavelength of modeling group asphalt sample quantitative
Analysis model；
The infrared spectrogram for acquiring asphalt sample to be measured, according to the corresponding characteristic wave of characterisitic parameter in gained infrared spectrogram
Spectral information in long range obtains the characteristic parameter value of asphalt sample to be measured in conjunction with Quantitative Analysis Model.
The characterisitic parameter of test modeling group asphalt sample of the present invention, and acquire the infrared spectrogram of modeling group asphalt sample；
The characterisitic parameter is softening point, needle penetration or mass loss.
In the present invention, the modeling group preferably includes 20 kinds or more asphalt samples, more preferably includes 80 kinds or more of drip
Green sample.
The present invention is not particularly limited the source of the modeling group asphalt sample, can be any commercially available pitch sample
Product.In the present invention, the modeling group asphalt sample is preferably that the value of characterisitic parameter differs biggish multiple asphalt samples.
In the present invention, the characterisitic parameter of the modeling group asphalt sample preferably uses standard No. for JTGE-20-2011's
Method disclosed in standard measures.
In the present invention, the acquisition condition of the infrared spectrogram is preferred are as follows: 4000~10000cm of spectral scanning range-1,
Scanning times 128 times.
After the infrared spectrogram for acquiring modeling group asphalt sample, it is also preferable to include carry out gained infrared spectrogram by the present invention
Pretreatment, the pretreatment preferably include the background deduction successively carried out, smoothing processing and baseline correction processing, obtain modeling group
The infrared spectrogram of asphalt sample.
In the present invention, the pretreatment further preferably include eliminate one of constant, first derivation and second order derivation or
It is several.In the present invention, those skilled in the art, which can according to need, chooses whether using above-mentioned pretreatment operation.
In the present invention, it is preferred to be pre-processed using TQ Analyst spectral analysis software to the infrared spectrogram.
After obtaining characterisitic parameter and the infrared spectrogram of modeling group asphalt sample, joined using the characteristic of modeling group asphalt sample
Spectral information within the scope of several and corresponding characteristic wavelength establishes Quantitative Analysis Model.
In the present invention, the corresponding characteristic wavelength of the softening point ranges preferably from 4204.06~4373.76cm-1；It is described
The corresponding characteristic wavelength of needle penetration ranges preferably from 4448.34~4785.48cm-1, 4836.99~5342.71cm-1With
5333.34~6063.82cm-1；The corresponding characteristic wavelength of the mass loss ranges preferably from 4180.92~6024.53cm-1。
In the present invention, it is preferred to establish the Quantitative Analysis Model using TQ Analyst spectral analysis software；It is described fixed
The suggesting method of amount analysis model preferably includes following process:
Operation interface → selection modeling algorithm → definition component to be measured into TQ Analyst spectral analysis software is (i.e. defeated
Enter title, softening point, needle penetration and the mass loss of modeling group asphalt sample) → import modeling group sample infrared spectrogram →
The corresponding characteristic wavelength range → computation model of characterisitic parameter is selected, Quantitative Analysis Model is obtained.
In the present invention, the modeling algorithm is preferably Partial Least Squares.
After obtaining Quantitative Analysis Model, the present invention acquires the infrared spectrogram of asphalt sample to be measured, according to gained infrared light
Spectral information in spectrogram within the scope of the corresponding characteristic wavelength of characterisitic parameter obtains pitch sample to be measured in conjunction with Quantitative Analysis Model
The characteristic parameter value of product.
In the present invention, after the infrared spectrogram for collecting asphalt sample to be measured, the present invention is preferably by gained infrared spectroscopy
Figure is pre-processed；The pretreatment is preferably identical as the preprocess method of infrared spectrogram of modeling group asphalt sample, herein
It repeats no more.
In the present invention, the calculating of the characteristic parameter value of the asphalt sample to be measured preferably includes following process:
The corresponding characteristic wavelength range → quantization of infrared spectrogram → selection characterisitic parameter for importing asphalt sample to be measured, obtains
To characteristic parameter value.
Below with reference to embodiment to the measuring method of a kind of asphalt softening point provided by the invention, needle penetration and mass loss
It is described in detail, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
It is to build with SK90#, SK70# of different batches, Zhenghai 90#, Zhenghai 70#, gram refining 90# and a gram refining 70# asphalt sample
Mould group sample, totally 80 samples, use standard No. to measure the soft of 80 samples for method disclosed in the standard of JTG E-20-2011
Change point, needle penetration (test condition is 25 DEG C of temperature, loading 100g, injection time 5s) and mass loss (test condition 163
DEG C, aging 85min).The spectral scanning range that Fourier infrared spectrograph is arranged is 4000~10000cm-1, scanning times 128
It is secondary, acquire the infrared spectrogram of above-mentioned 80 samples；
Into the operation interface of TQ Analyst spectral analysis software, select Partial Least Squares as modeling algorithm, it is fixed
Justice component to be measured, inputs title, softening point, needle penetration and the mass loss of modeling group asphalt sample, imports modeling group sample
Infrared spectrogram is successively deducted background, smoothing processing and baseline correction processing, obtains pretreated infrared spectrogram；
(the corresponding characteristic wavelength range of softening point is 4204.06~4373.76cm to selected characteristic wavelength range-1；Needle penetration
Corresponding characteristic wavelength range is 4448.34~4785.48cm-1, 4836.99~5342.71cm-1With 5333.34~
6063.82cm-1；The corresponding characteristic wavelength range of mass loss is 4180.92~6024.53cm-1), computation model (is clicked
" Calibrate "), Quantitative Analysis Model is obtained, software provides softening point measured value-calculated value correlation curve (such as Fig. 1 institute
Show, abscissa is measured value, and ordinate is calculated value), needle penetration measured value-calculated value correlation curve (as shown in Figure 2) and
Mass loss measured value-calculated value correlation curve (as shown in Figure 3)；
Use that standard No. measures the softening point of 5 samples to be tested for method disclosed in the standard of JTG E-20-2011, needle enters
Degree and mass loss (being denoted as true value), the results are shown in Table 1, acquires according to the method for modeling group acquisition infrared spectrogram to test sample
The infrared spectrogram of sample to be tested is imported TQ Analyst spectral analysis software, is successively deducted by the infrared spectrogram of product
Background, smoothing processing and baseline correction processing, then select characteristic wavelength range (specific range is with modeling group asphalt sample),
Quantization (is clicked " Quantify "), obtains test value, the results are shown in Table 1.
The comparison of characteristic parameter value and the true value obtained using standard method that the test method provided by the invention of table 1 obtains
By Fig. 1~3 it is found that the measured value of modeling group asphalt sample prediction and the relative coefficient of calculated value reach 0.9
More than, illustrate that calculated value obtained by measuring method provided by the invention is connect very much with the measured value measured using traditional standard method
Closely, test method provided by the invention accuracy with higher.By the test (as shown in table 1) to 5 new samples it is found that
The test value that measuring method of the invention obtains is consistent with the true value obtained using standard method, and error is very small, further
Illustrate that the reliability of test method of the invention is higher.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of asphalt softening point, needle penetration and the measuring method of mass loss, include the following steps:
The characterisitic parameter of test modeling group asphalt sample, and acquire the infrared spectrogram of modeling group asphalt sample；The characteristic ginseng
Number is softening point, needle penetration or mass loss；
Quantitative analysis is established using the spectral information within the scope of the characterisitic parameter and corresponding characteristic wavelength of modeling group asphalt sample
Model；
The infrared spectrogram for acquiring asphalt sample to be measured, according to the corresponding characteristic wavelength model of characterisitic parameter in gained infrared spectrogram
Spectral information in enclosing obtains the characteristic parameter value of asphalt sample to be measured in conjunction with Quantitative Analysis Model.
2. measuring method as described in claim 1, which is characterized in that the modeling group includes 20 kinds or more asphalt samples.
3. measuring method as described in claim 1, which is characterized in that the characterisitic parameter of the modeling group asphalt sample is using mark
Method disclosed in the quasi- number standard for JTG E-20-2011 measures.
4. measuring method as described in claim 1, which is characterized in that the acquisition condition of the infrared spectrogram are as follows: spectrum is swept
Retouch 4000~10000cm of range-1, scanning times 128 times.
5. measuring method as described in claim 1, which is characterized in that acquisition modeling group asphalt sample infrared spectrogram and to
It further include being pre-processed to gained infrared spectrogram after surveying the infrared spectrogram of asphalt sample, the pretreatment includes successively
Background deduction, smoothing processing and the baseline correction processing of progress.
6. measuring method as described in claim 1, which is characterized in that the corresponding characteristic wavelength range of the softening point is
4204.06~4373.76cm-1；The corresponding characteristic wavelength range of the needle penetration is 4448.34~4785.48cm-1、
4836.99~5342.71cm-1With 5333.34~6063.82cm-1；The corresponding characteristic wavelength range of the mass loss is
4180.92~6024.53cm-1。
7. measuring method as described in claim 1, which is characterized in that using described in the foundation of TQAnalyst spectral analysis software
Quantitative Analysis Model.
8. measuring method as described in claim 1, which is characterized in that using described in the calculating of TQAnalyst spectral analysis software
The characteristic parameter value of asphalt sample to be measured.
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| CN113867292A (en) * | 2021-10-09 | 2021-12-31 | 益路恒丰衡水沥青科技有限公司 | Rubber asphalt quality control method |
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