Effect of microstructure of recycled asphalt on rheological properties

doi:10.13245/j.hust.190622

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Effect of microstructure of recycled asphalt on rheological properties
	Lin, Mei; Li, Ping; Nian, Tengfei; Wei, Xiying
刊名	Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition)
	2019-06-23
卷号	47 期号:6 页码:121-126
关键词	Aromatic compounds Asphalt pavements Carbonyl compounds Chemical analysis Correlation methods Entropy Fourier transform infrared spectroscopy Microstructure Recycling Rheology Scanning electron microscopy Spectrum analysis Thermal fatigue Chemical compositions Correlation analysis Dynamic shear rheology Microstructure characteristics Microstructure characterization Recycled asphalt Rheological parameter Rheological property
ISSN号	16714512
DOI	10.13245/j.hust.190622
英文摘要	In order to deeply study the reclaim mechanism of asphalt, it is expected to provide effective measures for the reclaim of asphalt binder. The changes of rheological property parameters and characteristic functional group content of aging and reclaimed asphalt and their correlation degree, micromorphology were discussed based on grey entropy correlation analysis, combined with Fourier transform infrared spectroscopy (FTIR), dynamic shear rheology (DSR) and scanning electron microscopy (SEM) testing techniques. The results show that the C=O group and the S=O group index of asphalt increase significantly in the FTIR spectrum after asphalt aging. However, the aromatic content and the asymmetric aliphatic group content are reduced. After the addition of the rejuvenator, the change in the characteristic functional group content of the reclaimed asphalt is opposite to that of the aged asphalt. After adding the rejuvenator to the aged asphalt, the value of complex modulus decrease and the phase angle increase. Anti-rutting factors and fatigue factors exhibit a power exponential decay trend with the changes of temperature. Temperature is an important factor affecting the anti-rutting performance and fatigue resistance of asphalt. After the aging of the asphalt, the microstructure characteristics change from smooth to dense folds, and after the addition of the regenerant, the basic shape is restored to a smooth appearance. Based on the grey entropy correlation analysis, it can be concluded that the degree of influence of chemical composition change of reclaimed asphalt on high temperature rheological parameters is as follows, carbonyl, sulfoxide group, aromatic compounds, asymmetric aliphatic. © 2019, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.
语种	中文
出版者	Huazhong University of Science and Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113955]
专题	土木工程学院
作者单位	School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Lin, Mei,Li, Ping,Nian, Tengfei,et al. Effect of microstructure of recycled asphalt on rheological properties[J]. Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition),2019,47(6):121-126.
APA	Lin, Mei,Li, Ping,Nian, Tengfei,&Wei, Xiying.(2019).Effect of microstructure of recycled asphalt on rheological properties.Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition),47(6),121-126.
MLA	Lin, Mei,et al."Effect of microstructure of recycled asphalt on rheological properties".Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) 47.6(2019):121-126.