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Method for rapidly detecting macroscopic indexes of asphalt based on near infrared spectrum technology

A near-infrared spectroscopy and infrared spectroscopy technology is applied in the detection field of asphalt macro indicators, which can solve the problems such as the inability to guarantee the supply quality of asphalt pavement raw materials, the supervision that affects the asphalt quality, and the lag in the detection results, so that the detection results are intuitive, true and reliable. Avoid human error, easy to operate

Inactive Publication Date: 2018-12-14
JIANGSU SINOROAD ENG TECH RES INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Practice has proved that the traditional method of asphalt macro index testing process requires a variety of test and testing equipment, the operation process is complicated, the test cycle is long, and the test results lag behind the project requirements for a long time, which seriously affects the supervision of asphalt quality during the construction process. As a result, the supply quality of raw materials required for asphalt pavement cannot be guaranteed, and there is a great engineering safety hazard

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  • Method for rapidly detecting macroscopic indexes of asphalt based on near infrared spectrum technology
  • Method for rapidly detecting macroscopic indexes of asphalt based on near infrared spectrum technology
  • Method for rapidly detecting macroscopic indexes of asphalt based on near infrared spectrum technology

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Embodiment 1

[0036] A kind of method of the present invention is based on near-infrared spectrum technique and detects the macro index of bitumen rapidly, comprises following operation steps:

[0037] Step 1. Use a Fourier transform infrared spectrometer to detect 60 different batches of SBS modified asphalt samples of the same variety at a test wavenumber of 600-4000cm -1 Absorbance within the range, according to the position of the peak in the infrared spectrogram, the qualitative analysis of the organic groups in the asphalt is carried out, and the organic groups in the asphalt are quantitatively analyzed according to the absorbance, and the infrared spectrum database of the asphalt samples is established. The results are shown in figure 1 .

[0038] Step 2. According to "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) T0604 Asphalt Penetration Determination Method, test the penetration of 60 SBS modified asphalt samples of the same variety and d...

Embodiment 2

[0050] A kind of method of the present invention is based on near-infrared spectrum technique and detects the macro index of bitumen rapidly, comprises following operation steps:

[0051] Step 1. Use a Fourier transform infrared spectrometer to detect 60 different batches of SBS modified asphalt samples of the same variety at a test wavenumber of 600-4000cm -1 According to the absorbance within the range, the organic groups in the asphalt are qualitatively analyzed according to the position of the peak in the infrared spectrum, and the organic groups in the asphalt are quantitatively analyzed according to the absorbance to establish the infrared spectrum database of the asphalt samples. The results are shown in Figure 4 .

[0052] Step 2. according to " road engineering bitumen and bituminous mixture test procedure " (JTG E20-2011) T0605 asphalt ductility measurement method, test the ductility of 60 SBS modified asphalt samples of the same kind different batches in the test s...

Embodiment 3

[0064] A kind of method of the present invention is based on near-infrared spectrum technique and detects the macro index of bitumen rapidly, comprises following operation steps:

[0065] Step 1. Use a Fourier transform infrared spectrometer to detect 60 different batches of SBS modified asphalt samples of the same variety at a test wavenumber of 600-4000cm -1 According to the absorbance within the range, the organic groups in the asphalt are qualitatively analyzed according to the position of the peak in the infrared spectrum, and the organic groups in the asphalt are quantitatively analyzed according to the absorbance to establish the infrared spectrum database of the asphalt samples. The results are shown in Figure 7 .

[0066] Step 2. According to the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) T0606 Asphalt Softening Point Determination Method (Ring and Ball Method). Test the softening point of 60 different batches of SBS mo...

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Abstract

The invention provides a method for rapidly detecting macroscopic indexes of asphalt based on near infrared spectrum technology. The method comprises the steps of step 1, detecting the absorbance of aplurality of asphalt samples in different batches of the same variety at test wave number of 600-4000 cm-1, enabling the organic groups to be qualitatively analyzed according to the positions of wavepeaks in the infrared spectrogram, performing quantitative analysis on the organic groups according to the absorbance, and establishing an infrared spectrum database of the asphalt samples; step 2, testing macroscopic indexes of the asphalt samples in the step 1, establishing a macroscopic index database of the asphalt samples; step 3, establishing a quantitative relation model of the asphalt sample infrared spectrum database and the macroscopic index database; step 4, detecting the absorbance of the to-be-detected asphalt samples with the test wave number of 600-4000cm-1 to form an infraredspectrogram of the asphalts to be detected; and step 5, substituting the to-be-detected asphalt infrared spectrogram formed in the step 4 into the infrared spectrum and macroscopic index quantitativerelation model established in the step 3, and calculating macroscopic indexes of the asphalt samples to be detected.

Description

technical field [0001] The invention relates to a detection method for asphalt macroscopic indicators, in particular to a method for rapidly detecting asphalt macroscopic indicators based on near-infrared spectrum technology. Background technique [0002] The control of asphalt quality covers the whole process of asphalt production, asphalt sales, road construction and use. Penetration, ductility, softening point and other macro indicators are the key physical and mechanical indicators for evaluating the quality of asphalt materials, and they are also mandatory inspection items for asphalt quality control. At present, the test of asphalt penetration, ductility and softening point generally adopts T0604 determination method of asphalt penetration, T0605 determination method of asphalt ductility, T0606 Determination of asphalt softening point (ring and ball method). Practice has proved that the traditional method of asphalt macro index testing process requires a variety of t...

Claims

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Application Information

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IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor 邵慧君洪玲玲金光来张万磊宋冰泉姜晓飞
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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