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

By Xiangyu Li, Linhao Wang, Yuqing Liu, Wengui Li, Biqin Dong, Wenhui Duan. Cement & Concrete Composites, 2018

149 citations recorded by the source corpus.

Abstract 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.

Subfields: Civil and Structural Engineering, Pollution

View Paper: https://www.semanticscholar.org/paper/cbc590372a086b11984f8b40375f9c0cb22e9f21

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In Civil and Structural Engineering

1. M. Serdar
2. S. Brisard
3. Paulo J. M. Monteiro

Citations in the corpus

• Multiscale X-ray tomography of cementitious materials: A review (2020, background): “graphene oxide agglomerates [270, 271], waterborne epoxy resin [272], dense (unhydrated cement grains) and porous parts of cement matrix [273] and even features within Imperial Roman architectural mortar [274].”