Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs)
The interfacial transition zone (ITZ) governs the mechanical properties and durability of fiber-reinforced cement-based composites. It has been reported that strategic strengthening of the ITZ by simple coating of carbon nanofibers (CNFs) on microfibers resulted in a 22% enhancement of the fiber/mat...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/160670 |
| _version_ | 1826123941355192320 |
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| author | He, Shan Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering He, Shan Yang, En-Hua |
| author_sort | He, Shan |
| collection | NTU |
| description | The interfacial transition zone (ITZ) governs the mechanical properties and durability of fiber-reinforced cement-based composites. It has been reported that strategic strengthening of the ITZ by simple coating of carbon nanofibers (CNFs) on microfibers resulted in a 22% enhancement of the fiber/matrix bond. In the current study, ingenious methods were used to characterize such CNF-reinforced ITZ (CNF-ITZ). Results show that strategic application of CNFs greatly densified the ITZ with much reduced voids and defects. A distinctive hairy microstructure, resembling the setae on the toes of geckos, and less portlandite were found in the CNF-ITZ. The indentation hardness and indentation modulus were enhanced in both the radial and the tangential directions. The resulting CNF-reinforced ITZ is tougher and stronger with improved mechanical properties against deformation and cracking, which leads to enhanced fiber/matrix bond and elevated load transfer efficiency between fiber and matrix. |
| first_indexed | 2024-10-01T06:12:34Z |
| format | Journal Article |
| id | ntu-10356/160670 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:12:34Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1606702022-07-29T07:49:06Z Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) He, Shan Yang, En-Hua School of Civil and Environmental Engineering Engineering::Civil engineering Interfacial Transition Zone Fiber Reinforcement The interfacial transition zone (ITZ) governs the mechanical properties and durability of fiber-reinforced cement-based composites. It has been reported that strategic strengthening of the ITZ by simple coating of carbon nanofibers (CNFs) on microfibers resulted in a 22% enhancement of the fiber/matrix bond. In the current study, ingenious methods were used to characterize such CNF-reinforced ITZ (CNF-ITZ). Results show that strategic application of CNFs greatly densified the ITZ with much reduced voids and defects. A distinctive hairy microstructure, resembling the setae on the toes of geckos, and less portlandite were found in the CNF-ITZ. The indentation hardness and indentation modulus were enhanced in both the radial and the tangential directions. The resulting CNF-reinforced ITZ is tougher and stronger with improved mechanical properties against deformation and cracking, which leads to enhanced fiber/matrix bond and elevated load transfer efficiency between fiber and matrix. Economic Development Board (EDB) The authors would like to acknowledge financial support from Singapore Economic Development Board Industrial Postgraduate Programme (EDB IPP-JACOB LIM) and ceEntek Pte Ltd (RCA-11/164) 2022-07-29T07:49:06Z 2022-07-29T07:49:06Z 2021 Journal Article He, S. & Yang, E. (2021). Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs). Cement and Concrete Composites, 119, 104019-. https://dx.doi.org/10.1016/j.cemconcomp.2021.104019 0958-9465 https://hdl.handle.net/10356/160670 10.1016/j.cemconcomp.2021.104019 2-s2.0-85102633932 119 104019 en RCA-11/164 Cement and Concrete Composites © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Interfacial Transition Zone Fiber Reinforcement He, Shan Yang, En-Hua Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) |
| title | Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) |
| title_full | Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) |
| title_fullStr | Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) |
| title_full_unstemmed | Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) |
| title_short | Strategic strengthening of the interfacial transition zone (ITZ) between microfiber and cement paste matrix with carbon nanofibers (CNFs) |
| title_sort | strategic strengthening of the interfacial transition zone itz between microfiber and cement paste matrix with carbon nanofibers cnfs |
| topic | Engineering::Civil engineering Interfacial Transition Zone Fiber Reinforcement |
| url | https://hdl.handle.net/10356/160670 |
| work_keys_str_mv | AT heshan strategicstrengtheningoftheinterfacialtransitionzoneitzbetweenmicrofiberandcementpastematrixwithcarbonnanofiberscnfs AT yangenhua strategicstrengtheningoftheinterfacialtransitionzoneitzbetweenmicrofiberandcementpastematrixwithcarbonnanofiberscnfs |