Xiaodong Jia1, Naixing Liang2, and Kaifeng Zheng3This email address is being protected from spambots. You need JavaScript enabled to view it.
1School of Urban Construction Engineering, Chongqing Open University, Chongqing 400052, China
2School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
3Shenzhen Cheng Chung Design Co., Ltd., Shenzhen 518017, China
Received: June 19, 2025 Accepted: November 11, 2025 Publication Date: December 21, 2025
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
To explore the influence of inorganic-micro-powder materials on the fatigue perfor-mance of asphalt, hydrated lime (HL), silica fume (SF), and Portland cement (PC) were selected as representatives of inorganic-micro powder materials. Based on the type, content, a (1)nd particle size of inorganic-micro-powder materials, the influence of the micro-powder modifier on the fatigue performance of asphalt was analyzed by a dy-namic shear rheometer (DSR) time sweep test using dissipation energy index NDER and damage mechanics index C×Npeak. The core characteristic parameters of the mi-cro-powder that affect the fatigue life of asphalt were determined. The results show that, among the three different types of micro-powder, the influence of SF on the fatigue performance of asphalt was the most significant, followed by HL, and PC was the least influential. An increase of stress resulted in a gradual decrease of the influence of various micro-powder modifiers on the fatigue performance of asphalt. The surface area content (It refers to the surface area value of micro-powder per gram of asphalt material) of micro-powder is purported to be the core characteristic parameter affecting the fa-tigue life of asphalt, and the surface content stress fatigue equation between the fatigue life of the modified asphalt and the surface content and stress of micro-powder was established. The fatigue life prediction of micro-powder modified asphalt under the influence of different surface area content was realized.
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