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Method for identifying blended asphalt

A kind of asphalt and blending technology, which is applied in the direction of measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of low reproducibility, false negatives, and low accuracy in identifying blended asphalt

Pending Publication Date: 2020-10-30
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the low accuracy and low reproducibility of the existing identification of blended asphalt, false positives or false negatives are prone to problems, the purpose of the present invention is to provide a method for identifying blended asphalt

Method used

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  • Method for identifying blended asphalt
  • Method for identifying blended asphalt
  • Method for identifying blended asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1 (standard example)

[0072] Four different brands of No. 70 A-grade asphalt were selected for testing according to the technical requirements for road petroleum asphalt in the "Technical Specifications for Road Asphalt Pavement Construction" (JTG F40-2004). The test results are shown in the data in Table 1-4 below. Sample A, sample B, sample C, and sample D are specified as standard samples.

[0073] Among them, sample A is No. 70 grade A bitumen produced by Shandong Jingbo Petrochemical Co., Ltd.;

[0074] Sample B is No. 70 grade A bitumen produced by Sinopec Jinling Asphalt Co., Ltd.;

[0075] Sample C is No. 70 A-grade asphalt produced by Xiamen Huate Asphalt Industry Co., Ltd.;

[0076] Sample D is No. 70 grade A asphalt produced by Shandong Jinshi Asphalt Co., Ltd.

[0077] Table 1

[0078]

[0079] Table 2

[0080]

[0081] table 3

[0082]

[0083] Table 4

[0084]

[0085] Four different asphalt samples were weighed with an analy...

Embodiment 2

[0099] The crude oil is Jingbo and Jinling No. 70 asphalt mixed with each other at a mass ratio of 3:1 to form a blended asphalt sample A', and Jingbo No. 70 asphalt, Jinling No. 70 asphalt and blended asphalt sample A' were analyzed by secondary mass spectrometry Research.

[0100] According to the method of Example 1, prepare the blended asphalt sample A' as the sample solution to be tested, and the rest follow the steps exactly the same as in Example 1 to test Jingbo No. 70 asphalt sample solution, Jinling No. 70 asphalt sample solution and blended asphalt test Sample A'sample solution is tested, and the specific results are as follows Figure 5-8 shown.

[0101] The specific steps are: use an analytical balance to weigh the above three different asphalt samples, dissolve them in toluene and dilute them to 10 mg / mL, and use an ultrasonic machine to vibrate for 10 minutes to mix them evenly to obtain the asphalt mother liquor. Then use a mixed solution with a volume ratio ...

Embodiment 3

[0112] Get unknown sample B' sample, according to the mode of embodiment 1, prepare sample B' sample solution, all the other follow the steps identical with embodiment 1, test sample B' sample solution, concrete result is as follows Figure 9-12 shown.

[0113] The specific steps are: use an analytical balance to weigh the unknown sample B' sample, dissolve it in toluene and dilute it to 10 mg / mL, use an ultrasonic machine to vibrate for 10 minutes to mix it evenly, and obtain the bitumen mother liquor. Then use a mixed solution with a volume ratio of toluene and methanol of 1:3 as a diluent to dilute the bitumen mother liquor to about 0.2 mg / mL to obtain a bitumen sample B' sample solution. Before the test, an appropriate amount of ammonia water was added to the asphalt sample B' sample solution to enhance the ionization efficiency of the compounds in the asphalt (the volume concentration of the alkaline agent was 1.5 μL / mL).

[0114] Using time-of-flight mass spectrometry t...

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Abstract

The invention provides a method for identifying blended asphalt. The method comprises the steps of A preparing a to-be-detected sample solution, and carrying out primary mass spectrometry detection on the to-be-detected sample solution by using time-of-flight mass spectrometry to obtain a primary mass spectrometry full spectrogram of a to-be-detected sample; B based on the primary mass spectrum full spectrum of the to-be-detected sample, continuing secondary mass spectrum detection to obtain a secondary mass spectrum full spectrum of the to-be-detected sample, and obtaining a secondary mass spectrum amplification spectrum of the to-be-detected sample; and C comparing the difference between the secondary mass spectrum amplification spectrogram of the to-be-detected sample and the secondarymass spectrum amplification spectrogram of the standard sample to obtain the difference between the to-be-detected sample and the standard sample, and judging whether the to-be-detected sample is blended asphalt or not. According to the method for identifying the blended asphalt, the compound, namely the asphalt sample to be detected, with very complex components can be rapidly and accurately analyzed, and the chemical composition and structural characteristics of the asphalt for a road are described from the molecular level, so that whether the asphalt is the blended asphalt or not is identified.

Description

technical field [0001] The invention relates to a method for identifying blended asphalt, which belongs to the field of asphalt material detection. Background technique [0002] Bitumen is a complex mixture of various complex polymer hydrocarbons and their derivatives. Its quality directly determines the construction quality of asphalt pavement, and affects the performance and service life of asphalt pavement. At present, there are still unqualified asphalt products in my country's asphalt market. Although my country has stipulated the technical requirements for ordinary road petroleum asphalt, it is often judged whether the asphalt is qualified or not from the perspective of physical properties, such as the three common asphalt indicators: penetration, softening point and Extensibility. This traditional method is not only time-consuming and labor-intensive, but also easily affected by modifiers and stabilizers, which distorts the test results. Therefore, simple physical p...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 常嵘龚演严二虎周震宇罗恺彦武强刘玉红潘树
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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