Asphalt penetration type water vapor diffusion coefficient detection method

A diffusion coefficient and detection method technology, applied in diffusion analysis, measuring devices, instruments, etc., can solve the problems of measuring asphalt, and achieve the effects of preventing water damage, simple and easy-to-operate test methods, and simple and easy-to-obtain experimental materials

Pending Publication Date: 2021-03-12
WUHAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0004] In view of this, it is necessary to provide an asphalt penetration type water vapor diffusion coefficient detection method to solve the problem of how to quickly and easily measure the water vapor diffusion coefficient of asphalt in the prior art

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  • Asphalt penetration type water vapor diffusion coefficient detection method
  • Asphalt penetration type water vapor diffusion coefficient detection method
  • Asphalt penetration type water vapor diffusion coefficient detection method

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Embodiment 1

[0048] The embodiment of the present invention provides an asphalt penetration type water vapor diffusion coefficient detection method, combining figure 1 look, figure 1 Schematic flow chart of the asphalt penetration type water vapor diffusion coefficient detection method provided by the present invention Figure 1 , the above-mentioned asphalt penetration type water vapor diffusion coefficient detection method includes steps S1 to S4, wherein:

[0049] In step S1, an aggregate sample coated with an asphalt oil film is prepared, wherein the aggregate sample coated with an asphalt oil film sequentially includes a first asphalt oil film layer, an aggregate layer and a second asphalt oil film layer;

[0050]In step S2, the water vapor diffusion coefficient of the test piece sheet is measured by the detection device by the following first formula, wherein the test piece sheet includes an aggregate sample not coated with asphalt oil film and an aggregate sample coated with asphal...

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Abstract

The invention relates to an asphalt penetration type water vapor diffusion coefficient detection method. The method comprises the following steps: preparing an aggregate sample coated with an asphaltoil film; measuring the moisture diffusion coefficient of a test piece sheet through a first formula and a detection device, wherein the test piece sheet comprises an aggregate sample which is not coated with an asphalt oil film and the aggregate sample coated with the asphalt oil film; respectively measuring the thicknesses of the first asphalt oil film, an aggregate layer and the second asphaltoil film; and determining the penetration type water vapor diffusion coefficient of the asphalt oil film through a second formula. According to the invention, the test of the asphalt penetration typewater vapor diffusion coefficient under specific temperature and different relative humidity gradients can be realized, the test materials are simple and easy to obtain, the test method is simple andeasy to operate, and a basis is provided for detecting the water damage mechanism of the asphalt mixture.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to an asphalt penetration type water vapor diffusion coefficient detection method. Background technique [0002] There are often cracks, looseness, and potholes on the asphalt pavement of expressways, and water damage has become one of the most important diseases that cause these phenomena. Existing experiments have shown that water damage is closely related to the water vapor diffusion coefficient of asphalt. During the movement of water vapor in the asphalt mixture, it will continue to carry water molecules into the interior of the asphalt mixture and the interface between the asphalt and the aggregate, reducing the asphalt film itself. The cohesive binding energy and the adhesive binding energy of the asphalt-aggregate interface can cause the cohesive failure of the asphalt film or the cohesive failure between the asphalt and the aggregate, coupled with repeated loads, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 罗蓉苗强黄婷婷涂崇志罗晶汪翔牛茏昌
Owner WUHAN UNIV OF TECH
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