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Void characteristic of asphalt mixture and extraction method of void characteristic

A technology for asphalt mixture and void characteristics, which is applied in the analysis of materials, suspensions and porous materials, measurement devices, etc., can solve problems such as the inability to meet research requirements, and achieve the effect of high processing efficiency and accurate data

Active Publication Date: 2016-03-30
南京路通检测有限公司
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  • Application Information

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Problems solved by technology

Obviously, simply taking the traditional void ratio as the void characteristic of asphalt mixture is far from meeting the research requirements.

Method used

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  • Void characteristic of asphalt mixture and extraction method of void characteristic
  • Void characteristic of asphalt mixture and extraction method of void characteristic
  • Void characteristic of asphalt mixture and extraction method of void characteristic

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Embodiment Construction

[0023] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0024] Aiming at the deficiency of using the void ratio to characterize the void characteristics in the prior art, the idea of ​​the present invention is to first obtain the void distribution data of asphalt mixture, then draw the void gradation curve according to the void distribution data, and finally use the two-parameter Weibull distribution model to calculate the void level The matching curve is fitted, and the scale parameters and shape parameters obtained by the fitting are used as the distribution information of the voids in the asphalt mixture in the scale space.

[0025] In order to facilitate the public's understanding, the technical solution of the present invention will be described in detail below with a specific embodiment.

[0026] 1. Acquisition of void distribution data of asphalt mixture:

[0027] Thanks to the increasingly mature CT...

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Abstract

The invention discloses a void characteristic of an asphalt mixture and belongs to the technical field of a civil engineering material. The void characteristic is a two-dimensional characteristic vector composed of a scale parameter and a shape parameter; the scale parameter and the shape parameter are obtained by fitting a void grading curve of the asphalt mixture by using a double-parameter Weibull distribution model; a logarithm transverse coordinate of the void grading curve is a size scale value of a void; and a vertical coordinate of the void grading curve is a quantity occupied ratio of the void smaller than the size scale value. The invention further discloses an extraction method of the void characteristic. With the adoption of the void characteristic of the asphalt mixture and the extraction method of the void characteristic, scale space distribution information of the void in the material can be relatively comprehensively and accurately reflected, and the distinguishing degree on the different materials is high; the formal structure is simple and subsequent simulation modeling is convenient to carry out; and the void characteristic can be used for replacing an existing void ratio to be used as a material parameter for characterizing the properties of the asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a void characteristic of asphalt mixture and an extraction method thereof. Background technique [0002] The void characteristics of asphalt mixtures affect the occurrence of pavement diseases to a certain extent, and also cause the performance differences between different mixtures, which are mainly reflected in the Marshall stability, modulus of resilience, splitting strength, and anti-corrosion of the mixture. Water damage, permanent deformation, etc. At present, relevant studies only analyze from the perspective of porosity, which is not deep enough. Asphalt mixtures with the same porosity may have different void characteristics such as void distribution, void structure, void size, and void number, resulting in the failure of recycled mixtures. performance difference. Therefore, it is necessary to accurately determine the mesoscopic structure of asphalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 李强高磊罗海龙张帅李国芬
Owner 南京路通检测有限公司
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