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Rapid SBS content detection method based on modified asphalt sample library

A technology of modified asphalt and detection method, applied in the direction of measurement device, chemical information database system, chemical information data warehouse, etc., can solve the problems of cumbersome detection operation, slow detection speed, poor detection effect, etc., and achieve low demand conditions. , The effect of improving the detection speed and improving the detection accuracy

Pending Publication Date: 2022-07-12
SOUTHEAST UNIV
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Problems solved by technology

[0009] Aiming at the disadvantages of slow detection speed, cumbersome detection operation and poor detection effect in the above-mentioned prior art, the present invention provides a rapid detection method of SBS content based on the modified asphalt sample library, which is used to improve the detection speed and detection work of SBS content degree of integration

Method used

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  • Rapid SBS content detection method based on modified asphalt sample library
  • Rapid SBS content detection method based on modified asphalt sample library
  • Rapid SBS content detection method based on modified asphalt sample library

Examples

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Embodiment 1

[0060] figure 1 The flow chart of the method for rapid detection of SBS content based on the modified asphalt sample library provided for the embodiment of the present invention.

[0061] refer to figure 1 , the method includes the following steps:

[0062] Step S101, preparing the sample to be tested and measuring the infrared spectrum;

[0063] Here, the sample to be tested is obtained by heating the SBS modified asphalt to be tested to 160°C to 180°C and pouring it into a circular silica gel test mold; On the module, the infrared spectrum is measured and the preprocessing of baseline correction and background subtraction is performed; ATR method is to reflect the test sample or standard sample on the infrared spectroscopy equipment, and obtain such as figure 2 Infrared spectra of the samples to be tested are shown. In this example, the sample to be tested is from AA company SBS modified asphalt; infrared spectroscopy equipment, the resolution is not less than 4.0cm -1...

Embodiment 2

[0085] refer to figure 1 , the method includes the following steps:

[0086] Step S101, preparing the sample to be tested and measuring the infrared spectrum;

[0087]Here, the sample to be tested is obtained by heating the SBS modified asphalt to be tested to 160°C to 180°C and pouring it into a circular silica gel test mold; On the module, the infrared spectrum is measured and the preprocessing of baseline correction and background subtraction is performed. In this example, the sample to be tested comes from SBS modified asphalt of BA company; infrared spectroscopy equipment with a resolution of not less than 4.0cm -1 , the wave number range is not less than 500cm -1 ~4000cm -1 , the signal-to-noise ratio is greater than 30000:1.

[0088] Step S102, normalize the infrared spectrum and divide the characteristic spectrum set;

[0089] Here, the measured infrared spectrum is first normalized according to formula (1), and then the normalized infrared spectrum is divided in...

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Abstract

The invention discloses a rapid SBS content detection method based on a modified asphalt sample library. The method comprises the following steps: preparing a sample to be detected and measuring an infrared spectrum; dividing the normalized infrared spectrum into a characteristic spectrum set according to a characteristic wave band; calculating the matching degree between the characteristic spectrum set of the to-be-detected sample and the characteristic spectrum sets of all standard samples in the modified asphalt sample library; according to the comparison condition of the maximum value of the matching degree obtained through calculation and a preset value, the characteristic area ratio is calculated, and the SBS content is predicted or the modified asphalt sample library continues to be expanded. The testing method is simple, convenient and rapid, the influence of raw material asphalt on SBS content prediction is considered, the modified asphalt sample library can be automatically updated and expanded, and the SBS content detection efficiency is improved.

Description

technical field [0001] The invention relates to the field of asphalt test detection, in particular to a rapid detection method for SBS content based on a modified asphalt sample library. Background technique [0002] SBS modifier, styrene-butadiene-styrene triblock copolymer, has been widely used in high temperature Construction and maintenance of grade highways, airport pavements and other projects. [0003] In actual engineering, the SBS content of modifier is the most important and sensitive factor to determine the pavement performance of asphalt pavement, and it plays a decisive role in the final performance of modified asphalt. Generally, the content of SBS is 3.5wt% to 5wt%. However, in the face of fierce market competition and high SBS manufacturing costs, some suppliers will deliberately reduce the content of SBS in modified asphalt in order to pursue higher profits, resulting in the inability of SBS in modified asphalt to form a network continuous phase. Unable to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G16C20/70G16C20/90
CPCG01N21/3563G16C20/70G16C20/90G01N2021/3572
Inventor 丁建明邹震宇
Owner SOUTHEAST UNIV
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