Method for analyzing porous asphalt mixture gap structure by using CT technology

Abstract

The invention provides a method used for analyzing the porous asphalt mixture void structure by adopting a CT technique, comprising the steps of: preparing porous asphalt mixture specimens, scanning the porous asphalt mixture specimen by an X-ray CT machine, reinforcing and cutting CT images, extracting void characteristic, calculating the characteristic parameter of the void structure, analyzing void plane information, analyzing void space information and memorizing the analysis result. The method adopts the CT scanning technique, can exactly and quickly obtain the digital images of the porous asphalt mixture, reinforces and cuts the images, extracts the corresponding characteristic parameters of the void, carries out the quantitative description on the structural characteristic of the void by a fractal theory by virtue of the parameters, comprehensively reflects the void structure information, and avoids the effects of all characteristics of the porous asphalt mixture on the void evaluation. The parameters lays the foundation for further researching the effect rule of the void structure on the splitting tensile strength and the permeability of the porous asphalt mixture and for researching the void decay behavior of the porous asphalt mixture.

Description

technical field [0001] The invention belongs to the technical field of asphalt mixture structure detection, and in particular relates to a method for analyzing the void structure of asphalt mixture by using CT technology and fractal theory. Background technique [0002] The pavement structure of high-grade highways must not only be able to withstand the repeated action of millions of driving loads, but also must have good surface functions to ensure sufficient comfort and safety for vehicles running at high speeds. In addition, modern transportation also requires that the road surface does not accumulate water during the rainy season, that there is no water mist when driving at high speed, and that there is no glare on the surface under sunlight, which will hinder the driver's sight and reduce the safety of high-speed driving. During the construction and use of asphalt pavement, the void in the asphalt mixture is a very important technical index, which has positive significa...

AI Technical Summary

Problems solved by technology

[0008] Based on the above analysis, traditional volumetric design methods and parameters cannot fully reflect all void information of asphalt mixture

In addition, in the current asphalt mixture design method, there is no corresponding technical means to measure the void structure characteristics

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