Review of emulsified asphalt modification mechanisms and performance influencing factors

被引:32
作者
Meng, Yongjun [1 ,2 ,3 ,4 ]
Chen, Jing [1 ]
Kong, Weikang [1 ]
Hu, Yirong [1 ]
机构
[1] Guangxi Univ, Sch Civil Engn & Architecture, Nanning 530004, Peoples R China
[2] Guangxi Univ, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning 530004, Peoples R China
[3] Guangxi Univ, Special Geol Highway Safety Engn Technol Res Ctr, Nanning 530004, Peoples R China
[4] Natl High Performance Comp Ctr Nanning Branch, Nanning 530004, Peoples R China
基金
中国国家自然科学基金;
关键词
Modified emulsified asphalt; Performance; Influencing factor; Modification mechanism; STABILITY; SBR; DEFORMATION;
D O I
10.1016/j.jreng.2023.01.006
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In recent years, with the improvement of the requirements of road performance, modified emulsified asphalts with better performance has gradually replaced the emulsified asphalt and become the primary material for road maintenance. This paper introduces the modified emulsified asphalt materials commonly used in pavement maintenance projects, definitions and modified mechanisms of polymerized styrene butadiene rubber (SBR) modified emulsified asphalt, styrene butadiene styrene block polymer (SBS) modified emulsified asphalt and waterborne epoxy resin (WER) modified emulsified asphalt are summarized. The analysis focused on comparing the effects of modifiers, preparation process, auxiliary additives, and other factors on the performance of modified emulsified asphalt. In this paper, it is considered that the greatest impact on the performance of emulsified asphalt is the modifier, emulsifier mainly affects the speed of breaking the emulsion, stabilizers on the basic performance of emulsified asphalt evaporative residue is small; and when the modifier is distributed in the asphalt in a network, the dosage at this time is the recommended optimum dosage. Finally, this study recommends that in the future, the polymer-asphalt compatibility can be improved through composite modification, chemical grafting and other methods to continue to develop broader applicability and better performance of modified emulsified asphalt.
引用
收藏
页码:141 / 155
页数:15
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