Recycling of waste printed circuit boards: Effect of PCB on aging resistance property of SBR modified asphalt

被引:7
|
作者
Meng, Yongjun [1 ,2 ,3 ]
Zhang, Chunyu [1 ]
Liu, Zhirong [1 ]
Ling, Lishan [1 ]
Lei, Jiechao [1 ,4 ]
Fang, Guipeng [1 ]
Luo, Xiaowan [1 ]
机构
[1] Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China
[2] Minist Educ, Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Peoples R China
[3] Special Geol Highway Safety Engn Technol Res Ctr G, Nanning 530004, Peoples R China
[4] Guangxi Transportat Sci & Technol Grp Co Ltd, Nanning 530004, Peoples R China
来源
JOURNAL OF BUILDING ENGINEERING | 2023年 / 72卷
基金
中国国家自然科学基金;
关键词
Printed circuit boards nonmetallic powder; Styrene butadiene rubber; Aging property; Microscopic mechanism; HIGH-TEMPERATURE PERFORMANCE; EVOLUTION; RHEOLOGY; BINDERS; ACID;
D O I
10.1016/j.jobe.2023.106617
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The disposal of nonmetallic waste of printed circuit boards (PCB) is mainly through incineration or landfill, which can cause serious environmental pollution and waste resources. In order to efficiently recover PCB, this paper focuses on the effect of PCB on the aging property of SBR modified asphalt. Indoor simulated aging tests were employed to evaluate the aging property of PS asphalt, and the aging rheological behaviors explored by the Dynamic shear rheometer (DSR). Furthermore, fluorescence microscopy (FM) and Fourier Transform Infrared spectroscopy (FTIR) tests were employed for the analysis of PS asphalt's aging mechanism from the microscopic composition and structure. The results show that with the incorporation of PCB, the asphaltene and glial molecules in the structure of SBR asphalt components increase. These macromolecules are adsorbed on the surface of asphalt and are not easily aged, which can protect the internal components of asphalt from the effects of aging. Therefore, the aging performance index of PS asphalt is significantly better than that of SBR and base asphalt, and the aging performance is obviously improved, and the incorporation of PCB enhances the deformation resistance of SBR asphalt; FM analysis shows that the incorporation of PCB before aging helps to improve the deformation resistance of SBR asphalt, but weakens its compatibility. The PS asphalt after aging is more stable in structure; FTIR test shows that the addition of PCB makes the PS asphalt can better inhibit the formation of asphalt carbonyl and sulfoxide groups and has strong resistance to aging. The study shows that the addition of PCB as a modifier to SBR modified asphalt improves the aging resistance and rheological property of SBR asphalt after aging, and can be used as a new environmental protection means to treat PCB.
引用
收藏
页数:17
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