Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature
This study investigated synergetic effects of hybrid polypropylene (PP) and steel fibers on explosive spalling prevention of ultra-high performance concrete (UHPC) at elevated temperature. Permeability of UHPC was measured and correlated to the extent of spalling quantitatively. Microstructures of U...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/139841 |
| _version_ | 1811696377269321728 |
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| author | Li, Ye Tan, Kang Hai Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Li, Ye Tan, Kang Hai Yang, En-Hua |
| author_sort | Li, Ye |
| collection | NTU |
| description | This study investigated synergetic effects of hybrid polypropylene (PP) and steel fibers on explosive spalling prevention of ultra-high performance concrete (UHPC) at elevated temperature. Permeability of UHPC was measured and correlated to the extent of spalling quantitatively. Microstructures of UHPC before and after elevated temperature exposure were examined to reveal potential mechanisms responsible for changes in permeability. Results showed that the use of hybrid PP and steel fibers completely prevented explosive spalling even at low fiber dosage of both fibers due to significant increase of permeability. Microstructural analysis revealed that such synergistic effect on increased permeability of hybrid PP and steel fiber-reinforced UHPC was attributed to enhanced connectivity of empty PP fiber tunnels by multiple microcracks generated from the thermal expansion of both fibers. |
| first_indexed | 2024-10-01T07:38:24Z |
| format | Journal Article |
| id | ntu-10356/139841 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:38:24Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1398412020-05-28T06:30:58Z Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature Li, Ye Tan, Kang Hai Yang, En-Hua School of Civil and Environmental Engineering Engineering::Civil engineering Explosive Spalling Ultra-high Performance Concrete (UHPC) This study investigated synergetic effects of hybrid polypropylene (PP) and steel fibers on explosive spalling prevention of ultra-high performance concrete (UHPC) at elevated temperature. Permeability of UHPC was measured and correlated to the extent of spalling quantitatively. Microstructures of UHPC before and after elevated temperature exposure were examined to reveal potential mechanisms responsible for changes in permeability. Results showed that the use of hybrid PP and steel fibers completely prevented explosive spalling even at low fiber dosage of both fibers due to significant increase of permeability. Microstructural analysis revealed that such synergistic effect on increased permeability of hybrid PP and steel fiber-reinforced UHPC was attributed to enhanced connectivity of empty PP fiber tunnels by multiple microcracks generated from the thermal expansion of both fibers. 2020-05-22T05:00:13Z 2020-05-22T05:00:13Z 2018 Journal Article Li, Y., Tan, K. H., & Yang, E.-H. (2019). Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature. Cement and Concrete Composites, 96, 174-181. doi:10.1016/j.cemconcomp.2018.11.009 0958-9465 https://hdl.handle.net/10356/139841 10.1016/j.cemconcomp.2018.11.009 2-s2.0-85057612851 96 174 181 en Cement and Concrete Composites © 2018 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Explosive Spalling Ultra-high Performance Concrete (UHPC) Li, Ye Tan, Kang Hai Yang, En-Hua Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature |
| title | Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature |
| title_full | Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature |
| title_fullStr | Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature |
| title_full_unstemmed | Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature |
| title_short | Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high performance concrete at elevated temperature |
| title_sort | synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra high performance concrete at elevated temperature |
| topic | Engineering::Civil engineering Explosive Spalling Ultra-high Performance Concrete (UHPC) |
| url | https://hdl.handle.net/10356/139841 |
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