Physically simulating the dispersion of chopped carbon fibres in mortar
Carbon fibre dispersion exerts a critical influence on the characteristics of carbon fibre-reinforced cement mortars (CFRCMs). This study accordingly investigated the dispersion of chopped carbon fibres (CCFs) in mortar using physical experiments with a transparent simulated mortar system comprising...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-05-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424008135 |
| _version_ | 1827216595163807744 |
|---|---|
| author | Hongtao Yu Fengchao Guo Li Liang Ji-Hua Zhu Feng Xing Chun Pei |
| author_facet | Hongtao Yu Fengchao Guo Li Liang Ji-Hua Zhu Feng Xing Chun Pei |
| author_sort | Hongtao Yu |
| collection | DOAJ |
| description | Carbon fibre dispersion exerts a critical influence on the characteristics of carbon fibre-reinforced cement mortars (CFRCMs). This study accordingly investigated the dispersion of chopped carbon fibres (CCFs) in mortar using physical experiments with a transparent simulated mortar system comprising colloidal silica and silica sand as replacements for cement and aggregate, respectively, and evaluated the microstructures and conductive performances of corresponding CFRCM specimens. In the simulated solutions, bundled CCFs in order were more prone to disperse into single fibres than clustered ones in disorder due to no physical fixation, colloidal silica prevented the formation of CCF clusters during stirring, and the shear force of moving sand dispersed but also broke CCFs. In the CFRCMs, sand aggregates reaggregated dispersed CCFs while larger sand particles increased CCF dispersion and improved specimen conductivity. Thus, decreasing the amount of CCFs clusters before dispersion, and a short stirring time in a single direction should be provided to prepare CFRCMs with well-dispersed CCFs. Meanwhile, a more dispersible aggregate and less formation of void should be also essential. |
| first_indexed | 2024-04-24T10:03:54Z |
| format | Article |
| id | doaj.art-2d4f7921370c41a983cf9369626f35a0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2025-03-21T15:05:37Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2d4f7921370c41a983cf9369626f35a02024-06-20T06:53:24ZengElsevierJournal of Materials Research and Technology2238-78542024-05-013029682976Physically simulating the dispersion of chopped carbon fibres in mortarHongtao Yu0Fengchao Guo1Li Liang2Ji-Hua Zhu3Feng Xing4Chun Pei5Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, Guangdong, PR ChinaGuangdong Bay Area Transportation Construction Investment Co., Ltd., Guangzhou, Guangdong, PR ChinaGuangdong Bay Area Transportation Construction Investment Co., Ltd., Guangzhou, Guangdong, PR ChinaGuangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, Guangdong, PR ChinaGuangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, Guangdong, PR ChinaGuangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, Guangdong, PR China; Corresponding author.Carbon fibre dispersion exerts a critical influence on the characteristics of carbon fibre-reinforced cement mortars (CFRCMs). This study accordingly investigated the dispersion of chopped carbon fibres (CCFs) in mortar using physical experiments with a transparent simulated mortar system comprising colloidal silica and silica sand as replacements for cement and aggregate, respectively, and evaluated the microstructures and conductive performances of corresponding CFRCM specimens. In the simulated solutions, bundled CCFs in order were more prone to disperse into single fibres than clustered ones in disorder due to no physical fixation, colloidal silica prevented the formation of CCF clusters during stirring, and the shear force of moving sand dispersed but also broke CCFs. In the CFRCMs, sand aggregates reaggregated dispersed CCFs while larger sand particles increased CCF dispersion and improved specimen conductivity. Thus, decreasing the amount of CCFs clusters before dispersion, and a short stirring time in a single direction should be provided to prepare CFRCMs with well-dispersed CCFs. Meanwhile, a more dispersible aggregate and less formation of void should be also essential.http://www.sciencedirect.com/science/article/pii/S2238785424008135DispersionMixture proportioningElectrical propertiesMortarFibre reinforcement |
| spellingShingle | Hongtao Yu Fengchao Guo Li Liang Ji-Hua Zhu Feng Xing Chun Pei Physically simulating the dispersion of chopped carbon fibres in mortar Journal of Materials Research and Technology Dispersion Mixture proportioning Electrical properties Mortar Fibre reinforcement |
| title | Physically simulating the dispersion of chopped carbon fibres in mortar |
| title_full | Physically simulating the dispersion of chopped carbon fibres in mortar |
| title_fullStr | Physically simulating the dispersion of chopped carbon fibres in mortar |
| title_full_unstemmed | Physically simulating the dispersion of chopped carbon fibres in mortar |
| title_short | Physically simulating the dispersion of chopped carbon fibres in mortar |
| title_sort | physically simulating the dispersion of chopped carbon fibres in mortar |
| topic | Dispersion Mixture proportioning Electrical properties Mortar Fibre reinforcement |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424008135 |
| work_keys_str_mv | AT hongtaoyu physicallysimulatingthedispersionofchoppedcarbonfibresinmortar AT fengchaoguo physicallysimulatingthedispersionofchoppedcarbonfibresinmortar AT liliang physicallysimulatingthedispersionofchoppedcarbonfibresinmortar AT jihuazhu physicallysimulatingthedispersionofchoppedcarbonfibresinmortar AT fengxing physicallysimulatingthedispersionofchoppedcarbonfibresinmortar AT chunpei physicallysimulatingthedispersionofchoppedcarbonfibresinmortar |