Method for analyzing distribution form of SBS modifier in asphalt mixture

Abstract

The invention discloses a method for analyzing the distribution form of an SBS modifier in an asphalt mixture, which belongs to the field of road pavement materials and processing and preparation of the road pavement materials. The method comprises the steps of preparing an SBS modified asphalt mixture microsection; observing the mixture slice sample by using a fluorescence-polarization microscope; carrying out qualitative and quantitative analysis on the mixture slice image; determining an image segmentation threshold of an SBS phase and an asphalt phase through image RGB (three primary colors) value analysis; and distinguishing the SBS modifier and other phases in the mixture, and analyzing the distribution form of the SBS modifier in the asphalt mixture according to the area ratio, shape factor, distribution uniformity, particle size and the like of the SBS in the image. The method provided by the invention is simple, convenient and feasible, can represent the distribution form of the SBS modifier in the mixture under the condition of not destroying the inherent aggregate inlay structure of the mixture, and provides a new method for analyzing the damage behavior of the SBS asphalt mixture in the service process.

Description

technical field [0001] The invention belongs to the technical field of road pavement materials and their processing and preparation, and more specifically relates to a method for analyzing the distribution of SBS modifiers in asphalt mixtures, specifically through asphalt mixture sheets that can be used for microscopic observation. Fluorescence microscopy and numerical analysis methods to analyze the distribution patterns of SBS in asphalt mixtures. Background technique [0002] SBS asphalt concrete is the most widely used modified asphalt concrete in expressway surface because of its good high temperature anti-rutting ability and low temperature crack resistance. However, as a high-molecular polymer, SBS is quite different from asphalt in molecular structure and molecular weight, and the compatibility between the two is poor. Poor compatibility will seriously affect the actual effect of modified asphalt concrete. On the basis of optimizing the production process parameter...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention proposes a method for analyzing the distribution form of SBS modifier in asphalt mixture, thereby solving the problem that the compatibility measured by the existing method cannot reflect the SBS modifier. Technical problems of the actual distribution form in asphalt and asphalt mixture

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