Effect of pretreated cow dung fiber on rheological and fatigue properties of asphalt binder

被引：0
作者：
Dongyu Niu
Zhao Zhang
Yangming Gao
Yuanxiao Li
Zhengxian Yang
Yanhui Niu
机构：
[1] Chang’an University,Engineering Research Center of Transportation Materials of the Ministry of Education
[2] Chang’an University,School of Materials Science and Engineering
[3] Delft University of Technology,Faculty of Civil Engineering and Geosciences
[4] Liverpool John Moores University,School of Civil Engineering and Built Environment
[5] Henan University of Science and Technology,College of Animal Science and Technology
[6] Fujian Provincial University Research Center for Advanced Civil Engineering Materials,College of Civil Engineering
[7] Fuzhou University,undefined
[8] Fuzhou University,undefined
来源：
Cellulose | 2023年 / 30卷
关键词：
Cow dung fiber; Modified asphalt binder; Surface treatment; Rheological properties; Fatigue cracking;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Cow dung waste has caused severe environmental pollution and public health issues in China. In this study, the cow dung residues were used as a cheap renewable fiber to modify asphalt binder, providing a new solution for the proper disposal of cow dung waste. Three cow dung fibers with two lengths were prepared using different treatments, including original cow dung fiber (CDF), surface treatments of cow dung fiber (STCDF) and alkali treatments of cow dung fiber (ATCDF). The physicochemical properties of CDF, STCDF and ATCDF were analyzed by scanning electron microscope (SEM) and thermogravimetry (TG). The viscidity, rheological properties and fatigue characteristics of CDF modified asphalt binders (CDFMA) were evaluated using Brookfield viscometer and dynamic shear rheometer. The results showed that the rough surfaces of STCDF and ATCDF improved their thermal stability. STCDF and ATCDF enhanced the resistance to permanent deformation under high temperature conditions of modified asphalt binder. STCDF modified asphalt binders exhibited the best viscosity and rheological performance. The increase of fiber length was positively correlated with the high temperature deformation resistance of CDFMA. CDF, STCDF and ATCDF inhibited fatigue cracking of modified asphalt binders compared to base asphalt binders. ATCDF modified asphalt binders exhibited higher fatigue life and smaller crack under the same cyclic loading. The increase in fiber length had a slight improvement on the fatigue resistance of modified asphalt binders.
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页码：3773 / 3791
页数：18
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