Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste
This work experimentally studies the mechanical properties and microstructure of cementitious composites reinforced with a three-dimensional graphene–carbon nanotube (CNT) hybrid. Firstly, the graphene–CNT (GC) hybrid is dispersed in cement pastes using ultrasonication and surfactant, and then, the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/19/6571 |
| _version_ | 1797575507706904576 |
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| author | Xin Zhao Li Qiu Deyu Kong Yangfei Huang Jintao Liu |
| author_facet | Xin Zhao Li Qiu Deyu Kong Yangfei Huang Jintao Liu |
| author_sort | Xin Zhao |
| collection | DOAJ |
| description | This work experimentally studies the mechanical properties and microstructure of cementitious composites reinforced with a three-dimensional graphene–carbon nanotube (CNT) hybrid. Firstly, the graphene–CNT (GC) hybrid is dispersed in cement pastes using ultrasonication and surfactant, and then, the effect of the GC hybrid on the early hydration of the cement pastes is investigated. The experimental results show that adding the GC hybrid shortens the setting stage of cement hydration and accelerates the early hydration process. Moreover, the macro- and micro-mechanical properties of each group are evaluated. The 7- and 28-day strength of the cement pastes improves with addition of the GC hybrid. Finally, the microstructural analysis demonstrates that the GC hybrid is reasonably well distributed in cement and forms a spatial network, which could bridge the cracks and compact the cementitious matrix. |
| first_indexed | 2024-03-10T21:40:35Z |
| format | Article |
| id | doaj.art-3ae9328fbdea499ba4ba148030f3d730 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T21:40:35Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-3ae9328fbdea499ba4ba148030f3d7302023-11-19T14:41:43ZengMDPI AGMaterials1996-19442023-10-011619657110.3390/ma16196571Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement PasteXin Zhao0Li Qiu1Deyu Kong2Yangfei Huang3Jintao Liu4Department Disaster Mitigation Structure, College of Civil Engineering, Tongji University, Shanghai 200092, ChinaChina Railway Eryuan Engineering Group, East China Survey and Design Co., Ltd., Hangzhou 310009, ChinaCollege of Civil Engineering, Zhejiang University of Technology, Hangzhou 310018, ChinaCollege of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310018, ChinaCollege of Civil Engineering, Zhejiang University of Technology, Hangzhou 310018, ChinaThis work experimentally studies the mechanical properties and microstructure of cementitious composites reinforced with a three-dimensional graphene–carbon nanotube (CNT) hybrid. Firstly, the graphene–CNT (GC) hybrid is dispersed in cement pastes using ultrasonication and surfactant, and then, the effect of the GC hybrid on the early hydration of the cement pastes is investigated. The experimental results show that adding the GC hybrid shortens the setting stage of cement hydration and accelerates the early hydration process. Moreover, the macro- and micro-mechanical properties of each group are evaluated. The 7- and 28-day strength of the cement pastes improves with addition of the GC hybrid. Finally, the microstructural analysis demonstrates that the GC hybrid is reasonably well distributed in cement and forms a spatial network, which could bridge the cracks and compact the cementitious matrix.https://www.mdpi.com/1996-1944/16/19/6571graphenecarbon nanotubesmicrohardnessmicrostructurehydration |
| spellingShingle | Xin Zhao Li Qiu Deyu Kong Yangfei Huang Jintao Liu Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste Materials graphene carbon nanotubes microhardness microstructure hydration |
| title | Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste |
| title_full | Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste |
| title_fullStr | Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste |
| title_full_unstemmed | Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste |
| title_short | Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste |
| title_sort | effects of three dimensional graphene carbon nanotube hybrid on the mechanical properties and microstructure of cement paste |
| topic | graphene carbon nanotubes microhardness microstructure hydration |
| url | https://www.mdpi.com/1996-1944/16/19/6571 |
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