Dispersion of graphene oxide agglomerates in cement paste and its effects on electrical resistivity and flexural strength

被引：128

作者：

Li, Xiangyu ^{[1
]}

Wang, Linhao ^{[1
]}

Liu, Yuqing ^{[2
]}

Li, Wengui ^{[3
]}

Dong, Biqin ^{[2
]}

Duan, Wen Hui ^{[4
]}

机构：

[1] Taiyuan Univ Technol, Coll Architecture & Civil Engn, Taiyuan 030024, Shanxi, Peoples R China

[2] Shenzhen Univ, Dept Civil Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Peoples R China

[3] Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Built Infrastruct Res, Sydney, NSW 2007, Australia

[4] Monash Univ, Dept Civil Engn, Melbourne, Vic 3800, Australia

来源：

CEMENT & CONCRETE COMPOSITES | 2018年 / 92卷

基金：

澳大利亚研究理事会;

关键词：

Graphene oxide; Dispersion; Cement; Electrical resistivity; EARLY-AGE HYDRATION; COMPOSITES; MICROSTRUCTURE; NANOSHEETS; CHEMISTRY; MECHANISM;

D O I：

10.1016/j.cemconcomp.2018.06.008

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Actual dispersion of graphene oxide (GO) in cement paste was investigated by using both X-ray computed tomography and X-ray photoelectron spectroscopy. It was found that GO nanosheets are mainly agglomerated, as an individual phase, with platelet-like morphology and little GO being absorbed onto surfaces of cement particles and hydration products. By performing an electrical resistivity test, GO agglomerates are found to be more electrically insulative than cement paste. Therefore, it is not possible to develop self-sensing cement composites by incorporating GO directly without resolving its dispersion issue. However, GO agglomerates enhance the flexural strength of cement paste because of their special morphology and intrinsic strength. Results showed that the flexural strength of cement paste was increased by 83% with incorporation of 0.04% GO by weight of cement.

引用

页码：145 / 154

页数：10

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