Improvements of low-temperature properties of direct coal liquefaction residue modified asphalt

被引：8

作者：

Ji J. ^{[1
,2
]}

Yuan Z. ^{[1
]}

Wei J. ^{[3
]}

Suo Z. ^{[1
,2
]}

Xu Y. ^{[1
,2
]}

Li H. ^{[1
]}

Shi Y. ^{[4
]}

机构：

[1] School of Civil Engineering and Transportation in Beijing University of Civil Engineering and Architecture, Beijing

[2] Beijing Advanced Innovation Center for Future Urban Design, Beijing

[3] National Institute of Clean-and-Low-Carbon Energy, Beijing

[4] Railway Engineering Research Institute, China Academy of Railway Sciences Company Limited, Beijing

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2019年 / 43卷 / 04期

关键词：

Compound modification; Direct coal liquefaction residue; Low-temperature properties; Modified asphalt; Plasticizer; Rubber powder; SBS;

D O I：

10.3969/j.issn.1673-5005.2019.04.020

中图分类号：

学科分类号：

摘要：

In order to improve the low-temperature properties of direct coal liquefaction residue (DCLR) modified asphalt, several different modifiers, such as SBS, rubber powder and three plasticizers (dioctyl maleate (DOM), dioctyl phthalate (DOP) and waterborne acrylic resin(WAR)) were used to enhance the properties of DCLR modified asphalt. The ductility at 5℃, bending beam rheometer (BBR) and scanning electron microscope tests were performed. The results show that the single modifier (SBS content is less than 3% or rubber powder content is less than 15%) has good effect on the low-temperature properties of DCLR modified asphalt. If the content of SBS or rubber powder is too high, it will have no improvement. The compound modifier, including SBS and rubber powder, present good effect on the low-temperature properties of DCLR modified asphalt. When the SBS content is 2% and the rubber powder is 15%, the modification effect is the best and the low-temperature properties of DCLR modified asphalt can basically meet the technical requirements of SBS modified asphalt I-D. Compared with the single modifier, the low-temperature properties of DCLR modified asphalt are improved one time. Among the three plasticizers, the effect of WAR on low-temperature properties of DCLR modified asphalt is the lowest, followed by DOP. And DOM is the highest. The low-temperature properties of DCLR modified asphalt with 3% DOM can satisfy the technical requirements of SBS modified asphalt I-D. Compared with compound modifier (the SBS content is 2% and the rubber powder is 15%), the preparation of DOM is more simple. In a comprehensive comparison, it is recommended that 3% DOM is the most suitable way to improve the low-temperature properties of DCLR modified asphalt. © 2019, Periodical Office of China University of Petroleum. All right reserved.

引用

页码：166 / 173

页数：7

共 31 条

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