Citation: JI Jie, LI Hui, WANG Jia-ni, SUO Zhi, XU Ying. Effect of compatibilizer on low-temperature performances of modified asphalts from direct coal liquefaction residue[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(8): 925-933. shu

Effect of compatibilizer on low-temperature performances of modified asphalts from direct coal liquefaction residue

JI Jie ^1,2,, ,
LI Hui ¹ ,
WANG Jia-ni ^1,2 ,
SUO Zhi ^1,2 ,
XU Ying ^1,2

1.
School of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2.
Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044, China

Corresponding author: JI Jie, jijie@bucea.edu.cn
Received Date: 8 April 2019
Revised Date: 5 June 2019

Fund Project: The project was supported by the National Natural Science Foundation of China(51778038), Beijing Natural Science Foundation Committee-Beijing Municipal Education Commission(KZ201910016017), Yangtse Rive Scholar and Innovation Team Development Plan(IRT-17R06), Fundamental Research Business Expenses of Municipal Universities-ZC Major Key Scientific Research Support Projects-ZC05 Scientific Research and Innovation Team Building Plan(X18259)Fundamental Research Business Expenses of Municipal Universities-ZC Major Key Scientific Research Support Projects-ZC05 Scientific Research and Innovation Team Building Plan X18259Yangtse Rive Scholar and Innovation Team Development Plan IRT-17R06Beijing Natural Science Foundation Committee-Beijing Municipal Education Commission KZ201910016017the National Natural Science Foundation of China 51778038

Figures(9)

In order to evaluate influence of different compatibilizers on low-temperature performances of direct coal liquefaction residue modified asphalts (DCLR modified asphalt), 3 compatibilizers including silane coupling agent, benzaldehyde and xylene were used. At first, the optimum dosage and mixing mode of the compatibilizers were determined by orthogonal test. Secondly, resistance to low-temperature cracking of the asphalt after adding compatibilizer was evaluated using the Double-Edge-Notched Tension (DENT) test. Finally, dispersion state of DCLR in asphalt were analyzed by scanning electron microscopy and software of Image Pro Plus diagram to quantitatively analyze low-temperature performances of the asphalts after adding compatibilizer. The test results show that addition of compatibilizer is helpful to improve dispersion of DCLR in asphalt and compatibility between them. Thus, the long-term stability of DCLR modified asphalt after adding compatibilizer can be maintained and its low-temperature performances are enhanced. Additionally, the 3 compatibilizers have different effects on low-temperature performances of the DCLR modified asphalt, silane coupling agent is the best, followed by benzaldehyde and xylene.
- compatibilizer,
- direct coal liquefaction residue modified asphalt,
- double edge notched tension test,
- low-temperature performance,
- dispersion area ratio
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