Study on aging resistance and micro characteristics of bio-asphalt/TLA composite modified asphalt binder

被引：16

作者：

Meng, Yongjun ^{[1
,2
,5
]}

Wang, Zheng ^{[1
]}

Lei, Jiechao ^{[1
,3
,4
]}

Liao, Yongjie ^{[1
]}

Zhao, Xiangyun ^{[1
]}

Qin, Yue ^{[1
]}

Fang, Guipeng ^{[1
]}

Zhang, Chunyu ^{[1
]}

机构：

[1] Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Guangxi, Peoples R China

[2] Minist Educ, Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Guangxi, Peoples R China

[3] Guangxi Key Lab Rd Struct & Mat, Nanning 530007, Guangxi, Peoples R China

[4] Guangxi Transportat Sci & Technol Grp Co Ltd, Nanning 530007, Guangxi, Peoples R China

[5] Special Geol Highway Safety Engn Technol Res Ctr G, Nanning 530004, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2022年 / 359卷

基金：

中国国家自然科学基金;

关键词：

Modified asphalt binder; Bio-bitumen; Anti-aging performance; Micromorphology; Anti-aging mechanism; TRINIDAD LAKE ASPHALT; CHEMICAL-CHARACTERIZATION; OIL; PERFORMANCE; PYROLYSIS; BIOMASS;

D O I：

10.1016/j.conbuildmat.2022.129566

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

With the development of road engineering, non-renewable petroleum asphalt binder is increasingly scarce. It is of great significance to replace part of petroleum asphalt binder with renewable biological asphalt binder in road engineering for sustainable social development. To solve the shortcomings of poor aging resistance of bio-asphalt, 25% of Trinidad Lake Asphalt (TLA) is added into different contents of bio-asphalt modified asphalt binder in this paper to prepare bio-asphalt/TLA composite modified asphalt binder to improve its aging resis-tance. Then physical property tests, Fourier transform infrared spectroscopy (FTIR) tests, scanning electron microscopy (SEM), and atomic force microscopy (AFM) tests are conducted to study the aging resistance and mechanism. The physical property test shows that compared with petroleum asphalt binder, the bio-asphalt/TLA composite modified asphalt binder has lower softening point increment, viscosity aging index, complex modulus aging index and higher residual penetration; The micro test shows that the order of CI growth rate of 6 asphalt binder from large to small is: O > 12B/T > 9B/T > 6B/T > 3B/T > T; Biological asphalt binder, TLA and pe-troleum asphalt binder have good compatibility and can form a new and more stable system. Bio-asphalt/TLA composite modified asphalt binder has good anti-aging performance.

引用

页数：13

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