Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach
Asphalt mastic serves as a critical binding material in hot mix asphalt mixtures, significantly influencing the performance and durability of asphalt pavements. The interaction between asphalt and mineral fillers directly affects the binding properties of the mastic. In this study, the adsorbed asph...
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MDPI AG
2025-03-01
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| author | Shuang Wang Zhichen Wang Ankang Yu Huanan Yu Zhongming He Xiangzhu Meng Zhi Gong Deqing Guan Fuli Zhang |
| author_facet | Shuang Wang Zhichen Wang Ankang Yu Huanan Yu Zhongming He Xiangzhu Meng Zhi Gong Deqing Guan Fuli Zhang |
| author_sort | Shuang Wang |
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| description | Asphalt mastic serves as a critical binding material in hot mix asphalt mixtures, significantly influencing the performance and durability of asphalt pavements. The interaction between asphalt and mineral fillers directly affects the binding properties of the mastic. In this study, the adsorbed asphalt film thickness was used as an indicator to evaluate the interaction between asphalt and mineral fillers. A micromechanical approach was proposed to calculate this thickness, and the results were compared using the Hashin model, the Mori–Tanaka model, and the generalized self-consistent model. The results demonstrate that the adsorbed asphalt film thickness, as determined using the micromechanical approach, ranged from 0.01 to 0.37 µm. The Hashin model was found to provide the most accurate characterization of the interaction between the asphalt and the mineral fillers. The order of adsorbed asphalt film thickness was as follows: coal gangue asphalt mastic > limestone asphalt mastic > fly ash asphalt mastic. Higher concentrations of acidic SiO<sub>2</sub> in the mineral fillers resulted in a weaker interaction between the asphalt and the fillers. When the temperature was below the softening point of the asphalt, the interaction strength decreased as frequency increased. Conversely, when the temperature exceeded the softening point, the interaction strength increased with frequency. The effect of temperature on the interaction capability was further influenced by the characteristics of the mineral fillers. The micromechanical-based method proposed in this study eliminates the dependency of the evaluation indicator on the volume fraction of mineral fillers, thereby providing a more accurate characterization of the interaction between asphalt and fillers. This approach provides a theoretical foundation to guide the design of asphalt mixtures. |
| format | Article |
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| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-a66fbd86b70940999c07a2d7cb1b11cf2025-08-20T02:05:23ZengMDPI AGApplied Sciences2076-34172025-03-01155273510.3390/app15052735Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical ApproachShuang Wang0Zhichen Wang1Ankang Yu2Huanan Yu3Zhongming He4Xiangzhu Meng5Zhi Gong6Deqing Guan7Fuli Zhang8School of Computer Science and Engineering, Hunan University of Information Technology, Changsha 410151, ChinaSchool of Computer Science and Engineering, Hunan University of Information Technology, Changsha 410151, ChinaJimo Highway Development Center of Qingdao City, Qingdao 266000, ChinaCollege of Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaDepartment of Road and Bridge Engineering, Liaoning Provincial College of Communications, Shenyang 110122, ChinaSchool of Computer Science and Engineering, Hunan University of Information Technology, Changsha 410151, ChinaSchool of Computer Science and Engineering, Hunan University of Information Technology, Changsha 410151, ChinaSchool of Computer Science and Engineering, Hunan University of Information Technology, Changsha 410151, ChinaAsphalt mastic serves as a critical binding material in hot mix asphalt mixtures, significantly influencing the performance and durability of asphalt pavements. The interaction between asphalt and mineral fillers directly affects the binding properties of the mastic. In this study, the adsorbed asphalt film thickness was used as an indicator to evaluate the interaction between asphalt and mineral fillers. A micromechanical approach was proposed to calculate this thickness, and the results were compared using the Hashin model, the Mori–Tanaka model, and the generalized self-consistent model. The results demonstrate that the adsorbed asphalt film thickness, as determined using the micromechanical approach, ranged from 0.01 to 0.37 µm. The Hashin model was found to provide the most accurate characterization of the interaction between the asphalt and the mineral fillers. The order of adsorbed asphalt film thickness was as follows: coal gangue asphalt mastic > limestone asphalt mastic > fly ash asphalt mastic. Higher concentrations of acidic SiO<sub>2</sub> in the mineral fillers resulted in a weaker interaction between the asphalt and the fillers. When the temperature was below the softening point of the asphalt, the interaction strength decreased as frequency increased. Conversely, when the temperature exceeded the softening point, the interaction strength increased with frequency. The effect of temperature on the interaction capability was further influenced by the characteristics of the mineral fillers. The micromechanical-based method proposed in this study eliminates the dependency of the evaluation indicator on the volume fraction of mineral fillers, thereby providing a more accurate characterization of the interaction between asphalt and fillers. This approach provides a theoretical foundation to guide the design of asphalt mixtures.https://www.mdpi.com/2076-3417/15/5/2735asphalt masticinteractionmicromechanical modeladsorbed asphalt film thicknessmineral filler |
| spellingShingle | Shuang Wang Zhichen Wang Ankang Yu Huanan Yu Zhongming He Xiangzhu Meng Zhi Gong Deqing Guan Fuli Zhang Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach Applied Sciences asphalt mastic interaction micromechanical model adsorbed asphalt film thickness mineral filler |
| title | Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach |
| title_full | Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach |
| title_fullStr | Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach |
| title_full_unstemmed | Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach |
| title_short | Characterizing the Interaction Between Asphalt and Mineral Fillers in Hot Mix Asphalt Mixtures: A Micromechanical Approach |
| title_sort | characterizing the interaction between asphalt and mineral fillers in hot mix asphalt mixtures a micromechanical approach |
| topic | asphalt mastic interaction micromechanical model adsorbed asphalt film thickness mineral filler |
| url | https://www.mdpi.com/2076-3417/15/5/2735 |
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