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Method for measuring content of SBS modifier in SBS modified asphalt

A technology of modified asphalt and modifier is applied in the field of measuring the content of SBS modifier in SBS modified asphalt, which can solve the problems of dark color, non-uniformity and low light transmittance of modified asphalt, and achieve a small sample size. , High stability and good reproducibility

Active Publication Date: 2018-07-20
CHANGAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using infrared spectroscopy for spectral collection, compared with other material samples, modified asphalt has the characteristics of dark color, low light transmittance and inhomogeneity, so it cannot be measured by traditional potassium bromide tablet method

Method used

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

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Embodiment 1

[0036] A method for measuring SBS modifier content in SBS modified asphalt, comprising the following steps:

[0037] Step 1, prepare the infrared test sample of SBS modified asphalt standard sample

[0038]Potassium bromide tablets were prepared by tablet-dissolving film method: 20.0000 g of SBS modified asphalt standard samples were weighed, and the content of SBS modifier accounted for 3.500%, 4.000%, 4.500% and 5.000% of the mass of SBS modified asphalt respectively. %, put it in a clean beaker, and slowly inject 200mL of toluene, stir to fully dissolve the SBS modified asphalt to obtain a stirring liquid; immerse the pre-prepared potassium bromide tablet in the above stirring liquid and let it stand for 30 minutes, then Take out the soaked potassium bromide pellets and place them on a bracket, put them into an oven with a vacuum device, and dry them at 60°C to prepare uniform potassium bromide pellets containing standard samples of SBS modified asphalt.

[0039] Step 2, p...

Embodiment 2

[0069] A method for measuring SBS modifier content in SBS modified asphalt, comprising the following steps:

[0070] Step 1, prepare the infrared test sample of SBS modified asphalt standard sample

[0071] Potassium bromide tablets were prepared by tablet-dissolving film method: 20.0000 g of SBS modified asphalt standard samples were weighed, and the content of SBS modifier accounted for 3.500%, 4.000%, 4.500% and 5.000% of the mass of SBS modified asphalt respectively. %, put it in a clean beaker, and slowly inject 200mL of toluene, stir to fully dissolve the SBS modified asphalt to obtain a stirring liquid; immerse the pre-prepared potassium bromide tablet in the above stirring liquid and let it stand for 30 minutes, then Take out the soaked potassium bromide pellets and place them on a bracket, put them into an oven with a vacuum device, and dry them at 60°C to prepare uniform potassium bromide pellets containing standard samples of SBS modified asphalt.

[0072] Step 2, ...

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Abstract

The invention provides a method for measuring the content of an SBS modifier in SBS modified asphalt. The method comprises the following steps: preprocessing infrared spectral data of modified asphaltstandard samples with known gradient SBS contents, then substituting a training set into an artificial neural network program for training, establishing a regression model of infrared spectra and SBScontents of the modified asphalt standard samples, and then substituting similarly data-preprocessed spectral data of a modified asphalt sample to be tested, as a testing set, into the regression model to obtain a predicted value of the SBS content of the modified asphalt sample to be tested, wherein infrared spectral data preprocessing comprises wavelength selection, background subtraction, baseline correction, abnormal data rejection, unit variance processing and the like, and a nonlinear regression problem can be effectively solved through full spectral information. By the method, an erroris small, the accuracy is high, the reproducibility is good, the stability is high, the required sample amount is small, the preprocessing method is simple, and the SBS content of the modified asphalt can be quickly and effectively measured.

Description

technical field [0001] The invention relates to the technical field of road engineering material quality detection, in particular to a method for measuring the content of SBS modifier in SBS modified asphalt. Background technique [0002] Modified asphalt is the addition of external additives (modifiers) such as rubber, resin, high molecular polymer, ground rubber powder or other fillers, or taking measures such as mild oxidation of asphalt to make asphalt or asphalt mixture The performance of asphalt binder can be improved. A certain amount of styrene-butadiene-styrene block copolymer (Styrene-butadiene-styrene, SBS) is added to asphalt, and a uniform mixture is formed under a certain temperature and mechanical shear force, that is, SBS modified Asphalt, SBS modified asphalt can significantly improve the performance of the pavement, and is widely used in the field of road engineering because of its excellent anti-rutting performance, anti-fatigue strength and water stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G06F17/18G06N3/08
CPCG01N21/3563G01N2021/3572G06F17/18G06N3/084
Inventor 王康段金伟郑华宇王平
Owner CHANGAN UNIV
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