Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete

被引：22

作者：

Li, Hechuan ^{[1
]}

Yu, Jianying ^{[1
]}

Wu, Shaopeng ^{[1
]}

Liu, Quantao ^{[1
]}

Li, Yuanyuan ^{[1
]}

Wu, Yaqi ^{[2
]}

Xu, Haiqin ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

[2] China Univ Geosci Wuhan, Sch Foreign Languages, Wuhan 430074, Peoples R China

来源：

MATERIALS | 2019年 / 12卷 / 07期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

asphalt concrete; induction heating; asphalt binder aging; FTIR; DSR; FCA; MIXTURES; FATIGUE; LDH;

D O I：

10.3390/ma12071067

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Induction heating is a valuable technology to repair asphalt concrete damage inside. However, in the process of induction heating, induced particles will release a large amount of heat to act on asphalt binder in a short time. The purpose of this paper was to study the effect of induction heating on asphalt binder aging in steel fibers modified asphalt concrete. The experiments were divided into two parts: induction heating of Dramix steel fibers coated with asphalt binder (DA) and steel wool fibers modified asphalt concrete. After induction heating, the asphalt binders in the samples were extracted for testing aging indices with Fourier Transform Infrared (FTIR), Dynamic Shear Rheometer (DSR), and Four-Components Analysis (FCA) tests. The aging of asphalt binder was analyzed identifying the change of chemical structure, the diversification of rheological properties, and the difference of component. The experiments showed that the binder inside asphalt concrete began aging during induction heating due to thermal oxygen reaction and volatilization of light components. However, there was no peak value of the carbonyl index after induction heating of ten cycles, and the carbonyl index of DA was equivalent to that of binder in asphalt concrete after three induction heating cycles, which indicated the relatively closed environment inside asphalt concrete can inhibit the occurrence of the aging reaction.

引用

页数：14

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