Method for identifying matrix asphalt quality through infrared spectroscopy technology

A base asphalt and infrared spectroscopy technology, which is applied in the direction of material analysis, color/spectral characteristic measurement, and measuring devices through optical means, can solve the problems of complex testing process, long test cycle, difficult identification and monitoring of base asphalt quality, etc. , to achieve good reproducibility, rapid matrix asphalt quality, and good quality control

Inactive Publication Date: 2013-08-21
ZHEJIANG UNIV
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Problems solved by technology

The testing process is relatively complicated and the testing period is long, so it is difficult to be widely used in the identification and monitoring of the quality of base asphalt

Method used

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  • Method for identifying matrix asphalt quality through infrared spectroscopy technology
  • Method for identifying matrix asphalt quality through infrared spectroscopy technology
  • Method for identifying matrix asphalt quality through infrared spectroscopy technology

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Experimental program
Comparison scheme
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Embodiment Construction

[0026] Determination of sample 1:

[0027] It is known that the test material 1 is base asphalt of specification 70#. After being modified by SBS, the pavement becomes soft during the construction process. After cooling, it cannot reach the hardness of normal asphalt pavement, so it is not suitable for pavement application. Completely dissolve the sample of test material 1 in chloroform; evenly coat the chloroform solution dissolved in test material 1 on the surface of the potassium bromide salt tablet; dry the potassium bromide salt tablet at 80 degrees for 30 minutes; Potassium salt tablets at 4000-400cm -1 Infrared transmission spectra averaged over 10 scans in the range (e.g. figure 1 shown); calculated transmission spectrum on the 1372-1382 cm -1 Office and 1455-1465cm -1 The relative B value of the absorption peak area is 0.2035; the calculated B value is greater than 0.201, which is not suitable for the base asphalt used for SBS modification; it is consistent with th...

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Abstract

The invention discloses a method for identifying matrix asphalt quality through an infrared spectroscopy technology. The method comprises the following steps of: obtaining the transmitted spectrum of matrix asphalt through a Fourier transform infrared spectrometer, and calculating the relative ratio B of peak areas of the characteristic infrared absorption peak of methyl in the matrix asphalt and the characteristic infrared absorption peak of methylene in the matrix asphalt on the transmitted spectrum; the matrix asphalt with calculated B value smaller than or equal to 0.190 is high quality matrix asphalt suitable for SBS (stimulated brillouin scattering) modification, the matrix asphalt with calculated B value of 0.190-0.201 is common matrix asphalt suitable for SBS modification, and the matrix asphalt with calculated B value larger than 0.201 is matrix asphalt not suitable for SBS modification. The method adopts the universal infrared spectroscopy technology, thereby being simple in sample preparation process, accurate and credible in judging result, good in sensitivity, good in reproducibility, capable of quickly identifying the quality of the matrix asphalt, and beneficial for managing and controlling the quality of the matrix asphalt and regulating the quality and application of the matrix asphalt.

Description

technical field [0001] The invention relates to a method for identifying the quality of base asphalt, in particular to a method for identifying the quality of base asphalt by infrared spectroscopy. Background technique [0002] Base bitumen is mainly derived from crude oil distillation residue or coking by-products. The base asphalt for expressways is mainly petroleum asphalt. Its main components are: a dark brown complex mixture of hydrocarbons of different molecular weights and their non-metallic derivatives, in liquid, semi-solid or solid state. Base asphalt is a very complex system, and the specific composition, molecular structure, and interaction relationship of each component are still under study. Generally, the components of base asphalt can be divided into four components: saturated hydrocarbons, aromatics, gums and asphaltenes. [0003] The relative molecular mass of saturated hydrocarbons in matrix pitch is 500-800, the H / C atomic ratio is about 2.0, the aroma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3563
Inventor 刘清岳林海金达莱陈怡刘瑞瑞
Owner ZHEJIANG UNIV
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