橡胶沥青的微观表征方法及其微观特性综述

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Abstract Rubber asphalt is a modified asphalt cement material which is processed into rubber powder and fully swelled with matrix asphalt under high temperature conditions of sufficient mixing. It’s environment-friendly pavement materialandhas become research hotspot in the field of highway engineering materials.The research on the mechanical properties of rubber asphalt has been relatively extensive, especially the production technology and application technology of rubber asphalt based on mechanical indexes have been very common.Studies have shown that adding rubber powder can make the penetration degree of rubber asphalt become smaller, the softening point is increased, and the viscosity is increased; The dynamic shear rheological test shows thatthe effect of rubber powder on the high temperature performance of asphalt is significant. The high temperature classification is two to three grades higher than that of the matrix asphalt. At the same time, rubber asphalt is endowed with excellent low temperature crack resistance and good elasticity. However, the modification mechanism and storage stability of rubber asphalt need further systematic and in-depth study.
Since asphalt is a mixture of various compounds, tire rubber powder is composed of natural rubber or synthetic rubber, sulfur, carbon black, plasticizer and antioxidant. After high temperature miscibility, the interaction is very complicated.In view of the limitations of current research conditions, it is difficult to fully explain the mechanism of microscopic action only through mechanical indicators.Therefore, the analysis of the modification mechanism of rubber asphalt by microscopic characterization has become its main research direction.Spectral analysis method facilitates the qualitative analysis of molecular structure, and can effectively separate the target mixture, so as to clearly depict the microstructure characteristics and composition distribution of the characterization object; In addition, the morphology of rubber powder and rubber asphalt can be studied by microscopic microscopy.
Based on this, this review introduces in detail the application of microscopic characterization techniques such as spectroscopic analysis methods and micromorphology analysis methods in the study of rubber asphalt modification mechanism, andthe research progress of the modification mechanism of rubber asphalt is summarized by the methods of spectroscopic analysis and microscopic morphology analysis. The evaluation me-thod of rubber asphalt is further elaborated from the microscale, which can provide reference for the rational application of the rubber asphalt microscopic characterization method.

Key words： rubber asphalt infrared spectroscopy thermogravimetric analysis gel permeation chromatography microstructure analysis

Published: 25 November 2019

CLC number:

U414

Fund:This work was financially supported by Xinxiang City Science and Technology Major Project(ZD19007).

About author:: Qing Zhang, doctor of engineering, senior engineer, master tutor, chief engineer of national engineering laboratory research center of highway maintenance equipment.He received doctorate from Chang’an University in 2013,and went to Waterloo University in Canada for academic visits and collaborative research from 2016 to 2017.Its research team is committed to relying on the interdisciplinary advantages of materials science and engineering science, starting from basic application research and technology development, emphasis is placed on the micro-structure control and optimization of functional materials, centre on the improvement of comprehensive properties of materials, important breakthroughs in some key technologies of engineering functional materials have been achieved, and the performance and technological level of various engineering materials have been effectively improved.He published many articles in SCI, EI and core source journals, granted a number of invention patents, presides over and undertakes many key scientific research projects, and won a number of awards for science and technology.Through long-term research, he has established rich theoretical reserve and diversified research and development system.

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Cite this article:

ZHANG Qing,HOU Dehua,SHI Jicun. Research Progress of Microscopic Characterization of Rubber Asphalt[J]. Materials Reports, 2019, 33(Z2): 247-253.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2019/V33/IZ2/247

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