Evaluation of thermo-mechanical properties of graphene/carbon-nanotubes modified asphalt with molecular simulation

被引：82

作者：

Zhou, Xinxing ^{[1
]}

Zhang, Xiao ^{[1
]}

Xu, Song ^{[2
]}

Wu, Shaopeng ^{[3
]}

Liu, Quantao ^{[3
]}

Fan, Zepeng ^{[1
]}

机构：

[1] Shanxi Transportat Res Inst, Key Lab Highway Construct & Maintenance Technol L, Minist Transport, Taiyuan, Peoples R China

[2] Fuzhou Univ, Coll Civil Engn, Fuzhou, Peoples R China

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

来源：

MOLECULAR SIMULATION | 2017年 / 43卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Graphene; carbon nanotubes; modified asphalt; thermo-mechanical properties; molecular simulation; RHEOLOGICAL PROPERTIES; CARBON NANOTUBES; DYNAMICS; BINDER; BEHAVIOR;

D O I：

10.1080/08927022.2016.1274985

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：

A comparative study was conducted to determine the effects of graphene and carbon nanotubes on the thermo-mechanical properties of asphalt binder using molecular simulations and experiments. Micro-morphology of graphene and carbon nanotubes was measured by scanning electron microscopy. Thermal stability and glass transition temperature were investigated by differential scanning calorimeter. Simulation results indicated that the T-g had slightly changed for graphene-modified asphalt (GMA) and carbon nanotubes-modified asphalt (CNsMA) and that the thermal expansion coefficients and thermal conductivity increased along with the adding amount of graphene or carbon nanotubes. The T-g calculated by density-temperature method was closer than the experimental T-g and the T-g decreased in the order of CNsMA, GMA and asphalt. Young's modulus of asphalt, GMA and CNsMA were 9.2658, 25.7563 and 17.8249 GPa at 298K, respectively, which indicated that thermo-mechanical properties of asphalt showed considerable improvements after the addition of graphene or carbon nanotubes, and carbon nanotubes-modified asphalt and GMA were promising candidates for the future modified asphalt.

引用

页码：312 / 319

页数：8

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