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Method for predicting bitumen properties

A kind of asphalt and property technology, applied in the field of dielectric spectrum prediction of asphalt properties, can solve the problems of time-consuming and expensive asphalt

Pending Publication Date: 2021-01-26
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, known analytical methods performed on bitumen require specialized laboratory equipment and trained technicians to perform
Furthermore, performing multiple analytical methods to assess the various properties of bitumen is expensive and time-consuming

Method used

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  • Method for predicting bitumen properties
  • Method for predicting bitumen properties

Examples

Experimental program
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Embodiment 1

[0050] In this example, the dielectric dissipation factor versus softening point for several reference bitumen samples was evaluated and plotted as figure 1 shown. The LASSO regression technique was used to fit a two-stage linear regression model.

Embodiment 2

[0052] In this example, the relationship between the dielectric loss factor and the change in softening point for several reference bitumen samples was evaluated and plotted, as figure 2 shown. The LASSO regression technique is used to fit a linear regression model.

Embodiment 3

[0054] In this example, impedance measurements were performed on a 5% weight / volume pitch toluene solution with a voltage amplitude of 0.5 V to 2.5 V, a frequency in the range of 1,480 Hz to 1,520 Hz, and at 1,500 Hz. Convert the impedance response to dielectric loss factor as described in this paper. use for example figure 1 The graph shown in converts dielectric loss factor values ​​to softening points such that a dielectric loss value of about 6 at 1,500 Hz gives a softening point of about 48°C (+ / - 3°C with about 75% accuracy ). Using for example a plot of the change in softening point (according to figure 2 ) performs a similar conversion. Additional data in the 2,350Hz to 2,450Hz frequency range provides about 3-4% additional accuracy. A similar level of additional accuracy can also be obtained by combining data from the frequency range of 51,000 to 54,000 Hz or from frequencies of 51,392 Hz and / or 53,521 Hz.

[0055] Alternatively, the dielectric loss factor of th...

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Abstract

Method for predicting one or more properties of bitumen using dielectric spectroscopy, wherein the method comprises: (a) dissolving a bitumen sample in a solvent to form a bitumen solution; (b) measuring the impedance response of the bitumen solution across a frequency range of from 1,400 Hz to 1,580 Hz; (c) converting the impedance response of the bitumen solution to a dielectric loss factor; and(d) comparing the dielectric loss factor of the bitumen solution to a reference database comprising dielectric loss factors of reference bitumen samples to predict one or more properties of the bitumen sample comprising the bitumen solution.

Description

technical field [0001] The present invention relates to methods for predicting bitumen properties using dielectric spectroscopy. Background technique [0002] Bitumen is mainly composed of hydrocarbons and their derivatives. Depending on its source, bitumen can be a viscous liquid or a solid at ambient temperatures. Its physical state gradually softens when heated, making it a useful material, especially for architectural applications. Bitumen, for example, is used as a binder in everything from roofing and flooring to sealing. Bitumen can be combined with aggregate to provide asphalt that can be used, for example, to make roads and airport runways. [0003] Bitumen is a substance with a variety of qualities that must be suitable for any of the many uses it can be used for. For paving applications, for example, the bitumen used to make asphalt must comply with a stringent system of specifications set by authorities around the world for the physical stresses a given road ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/02G01N33/42
CPCG01N27/026G01N33/42
Inventor S·M·巴塔查里亚D·J·德梅洛G·拉奥R·E·泰勒T·A·帕克
Owner SHELL INT RES MAATSCHAPPIJ BV