A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste
HighlightsWorkability of cement paste was reduced due to water trapped in GO agglomerates.Hydration of cement paste was not improved significantly since GO was agglomerated.The porosity of cement paste was not densified notably due to GO agglomeration.Compressive strength was improved due to effects of GO on pore, hydration, and crack-bridging.
AbstractIn this study, the effects of graphene oxide (GO) agglomerates on the workability, hydration, microstructure, and compressive strength of cement paste were addressed. The workability of cement paste was reduced because of the presence of GO agglomerates, which entrap a large amount of water. The mini-slump diameter was reduced by 21% with the incorporation of 0.03% by weight GO in cement paste. Hydration of the cement paste was accelerated due to nucleation sites provided by GO agglomerates serving as seeding material in the cement paste. The incorporation of GO refined the pore structure of the cement paste. The incorporation of GO was found to have much greater impact on macropores than on large and small mesopores. At 28days, the incorporation of 0.04% by weight GO produced a 14% improvement in the compressive strength of cement paste. Below 0.03%, the incorporation of GO had no positive effects on compressive strength.
Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste
HighlightsWorkability of cement paste was reduced due to water trapped in GO agglomerates.Hydration of cement paste was not improved significantly since GO was agglomerated.The porosity of cement paste was not densified notably due to GO agglomeration.Compressive strength was improved due to effects of GO on pore, hydration, and crack-bridging.
AbstractIn this study, the effects of graphene oxide (GO) agglomerates on the workability, hydration, microstructure, and compressive strength of cement paste were addressed. The workability of cement paste was reduced because of the presence of GO agglomerates, which entrap a large amount of water. The mini-slump diameter was reduced by 21% with the incorporation of 0.03% by weight GO in cement paste. Hydration of the cement paste was accelerated due to nucleation sites provided by GO agglomerates serving as seeding material in the cement paste. The incorporation of GO refined the pore structure of the cement paste. The incorporation of GO was found to have much greater impact on macropores than on large and small mesopores. At 28days, the incorporation of 0.04% by weight GO produced a 14% improvement in the compressive strength of cement paste. Below 0.03%, the incorporation of GO had no positive effects on compressive strength.
Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste
Li, Xiangyu (author) / Liu, Yan Ming (author) / Li, Wen Gui (author) / Li, Chen Yang (author) / Sanjayan, Jay G. (author) / Duan, Wen Hui (author) / Li, Zongjin (author)
Construction and Building Materials ; 145 ; 402-410
2017-04-08
9 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2017
| British Library Online Contents | 2017
| Taylor & Francis Verlag | 2020