| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Review and Prospect of the Target Relationship Between Chemical Components and Macroscopic Properties of Asphalt |
| ZHANG Hongfei1,2, ZHANG Jiupeng1,2, WANG Shuai3, CHEN Zixuan1,2,*, LI Zhe1, PEI Jianzhong1,2
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1 School of Highway, Chang’an University, Xi’an 710064, China
2 Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China
3 Shaanxi Transportation Planning Design and Research Institute Co., Ltd., Xi’an 710065, China |
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Abstract The complex chemical composition characteristics of asphalt are closely related to its pavement performance and will change with the service time of asphalt, resulting in a high degree of uncertainty in its performance. It is significant for the research and development of high-perfor-mance asphalt pavement materials to take the asphalt chemical components as a bridge to establish a targeting relationship between microscopic composition and macroscopic properties. This paper aims to systematically introduce and outlook the relationship between asphalt component characteristics and macroscopic properties, focusing on its guiding role in the optimal design of asphalt pavement materials. First, the research process and development trend of colloid structure theory, asphaltene structure modeling and molecular structure modeling of chemical components are reviewed from the micro-perspective. Second, the basic characteristics of saturate, aromatic, resin and asphaltene fractions and the commonly used separation methods are summarized. Then, the targeting relationships between the macroscopic properties of asphalt, including engineering index, multi-temperature domain rheological properties, thermal stability, aging properties, regeneration properties and the chemical component characteristics of asphalt are reviewed. The migration characteristics of the chemical components in the process of asphalt property transformation are analyzed and the mechanism of the chemical fractions on the evolution of macroscopic properties is revealed. This will provide some reference for the construction of targeted asphalt design, targeted flame-retardant and targeted regeneration systems. Finally, the design method of targeted chemical compositions of asphalt is proposed with the aid of molecular dynamics simulations of asphalt. The application conception for the relationship between chemical component characteristics and macroscopic properties of asphalt is proposed based on material genomic ideas.
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Published: 25 February 2025
Online: 2025-02-18
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