Method for rapidly measuring content of SBS modifier in modified asphalt

A technology for rapid determination and modification of modifiers, applied in the measurement of color/spectral properties, measurement devices, and preparation of samples for testing, etc. Fast analysis speed, reliable test and analysis results, and good sample uniformity

Pending Publication Date: 2019-05-14
广东华路交通科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But this kind of method all adopts the solvent method to dilute the asphalt and use less quality asphalt to test, and the uniformity of the modifier in the modified asphalt after dilution cannot be guaranteed, the thickness of the asphalt film varies, and the diluent It also has a great influence on the test results. In the actual detection process, the experimental value is quite different from the real value.

Method used

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  • Method for rapidly measuring content of SBS modifier in modified asphalt
  • Method for rapidly measuring content of SBS modifier in modified asphalt
  • Method for rapidly measuring content of SBS modifier in modified asphalt

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) In order to ensure the uniformity of the modified asphalt prepared with different modifier contents, fully stir and shear mix the base asphalt of SBS modifier for 2 hours, and figure 1 The modified asphalt samples were formed on the silicone test mold and released from the mold.

[0034] (2) Select the SBS content in the SBS modified asphalt to be 4.0%, 4.3%, 4.6%, 4.9%, 5.2%, respectively, and use the Fourier transform infrared spectrometer (FTIR-ATR) to test the sample. The test spectrum is as follows figure 2 shown.

[0035] (3) Select a modified asphalt sample, then set the number of scans to 32 in the test instrument, and select 8cm -1 resolution, and then repeat the sample loading test for the same sample 20 times to obtain the average spectrum to improve the accuracy and repeatability of the spectrum test.

[0036] (4) For the original spectral data (band 650-4000cm -1 ) adopts the Savitzky-Golay smoothing method, selects 5 smoothing points, and performs ...

example 2

[0052] (1) In order to ensure the uniformity of the modified asphalt prepared with different modifier contents, fully stir and shear mix the base asphalt of SBS modifier for 2 hours, and figure 1 The modified asphalt samples were formed on the silica gel test mold and released from the mold.

[0053] (2) Select SBS content in SBS modified asphalt to be 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, 5.0%, respectively, and use Fourier transform infrared spectrometer (FTIR-ATR) to test the samples.

[0054] (3) Select a modified asphalt sample, then set the number of scans to 64 in the test instrument, and select 4cm -1 resolution, and then repeat the sample loading test for the same sample 10 times to obtain the average spectrum to improve the accuracy and repeatability of the spectrum test.

[0055] (4) For the original spectral data (band 650-4000cm -1 ) adopts the Savitzky-Golay smoothing method, selects 5 smoothing points, and performs ANV (standard notmal variate) processing, then uses t...

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Abstract

The invention discloses a method for rapidly measuring the content of an SBS modifier in modified asphalt. The method comprises the following steps: employing a Savitzky-Golay smoothing method for original spectral data of wavebands 650-4000cm<-1>, selecting 5 as the number of smoothing points, performing standard normal variable SNV processing, performing first-order Savitzky-Golay reciprocal processing, and then performing mean value centralization processing; screening main wave number variables of modified asphalt with different SBS contents via a CARS variable screening method; and analyzing principal components by using a BP neural network based on the matlab analysis software, and adjusting the parameters to obtain an optimal structure network, so as to obtain an optimal predictionmodel. The method disclosed by the invention has the advantages that the sample preparation is scientific and simple, a sample can be rapidly formed and demolded, the uniformity of the sample is good,the efficiency is high, the test method is simple, convenient and fast, the infrared spectrogram of the asphalt can be accurately tested and modified, the spectroscopy is combined with the chemometrics, the test method has good repeatability and reproducibility, the analysis speed is high, and the operation is simple.

Description

technical field [0001] The invention relates to the technical fields of road engineering and asphalt quality detection and detection, in particular to a method for quickly measuring the content of SBS modifier in modified asphalt. Background technique [0002] Asphalt pavement is widely used in our country because of its excellent road performance and good service performance. As a binder to improve the performance of asphalt pavement, SBS modified asphalt is being used more and more. The modified asphalt, aggregate and gradation in the modified asphalt mixture have strict regulations, but there are no clear regulations on the control of the key raw materials of the modifier that have a significant impact on the asphalt modification effect. Studies have shown that the content of SBS in asphalt determines the phase structure of modified asphalt and affects the modification effect. The SBS content is between 4-5%. Both asphalt and SBS are continuous phases, and the modificati...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N21/3563G01N1/36G01N1/38
Inventor 王志祥陈楚鹏刘新海许新权方杨何伟杰李善强吴传海周勇
Owner 广东华路交通科技有限公司
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