Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume
Formulation of strain hardening cementitious composites typically engage 2% or more fiber by volume, resulting in higher cost and difficult processing. This study presents the development of strain hardening magnesium-silicate-hydrate composite with an extremely low fiber volume fraction of 0.5% via...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/171381 |
| _version_ | 1826125759210586112 |
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| author | Sonat, Cem Kumar, Dhanendra Koh, Wee Chen Li, Junxia Unluer, Cise Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Sonat, Cem Kumar, Dhanendra Koh, Wee Chen Li, Junxia Unluer, Cise Yang, En-Hua |
| author_sort | Sonat, Cem |
| collection | NTU |
| description | Formulation of strain hardening cementitious composites typically engage 2% or more fiber by volume, resulting in higher cost and difficult processing. This study presents the development of strain hardening magnesium-silicate-hydrate composite with an extremely low fiber volume fraction of 0.5% via micromechanics-guided design approach. The developed composite demonstrated a tensile strain capacity of 7.2% with a tensile strength of 2.24 MPa, and a compressive strength of 86.1 MPa. The fiber/matrix interfacial bond was characterized using single fiber pullout test. The microstructural characterization of fiber surface and fiber tunnel in the matrix was carried out to understand the fiber/matrix interface properties. The micromechanics-based assessment of critical fiber volume fraction required to achieve strain hardening was also conducted. The material sustainability of the developed composite was evaluated and compared with existing Portland cement-based strain hardening cementitious composites, and strategies to further reduce embodied carbon and primary energy were proposed. |
| first_indexed | 2024-10-01T06:41:55Z |
| format | Journal Article |
| id | ntu-10356/171381 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:41:55Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1713812023-10-23T07:31:22Z Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume Sonat, Cem Kumar, Dhanendra Koh, Wee Chen Li, Junxia Unluer, Cise Yang, En-Hua School of Civil and Environmental Engineering Institute of Materials Research and Engineering, A*STAR Engineering::Civil engineering Low Fiber Dosage Micromechanics Formulation of strain hardening cementitious composites typically engage 2% or more fiber by volume, resulting in higher cost and difficult processing. This study presents the development of strain hardening magnesium-silicate-hydrate composite with an extremely low fiber volume fraction of 0.5% via micromechanics-guided design approach. The developed composite demonstrated a tensile strain capacity of 7.2% with a tensile strength of 2.24 MPa, and a compressive strength of 86.1 MPa. The fiber/matrix interfacial bond was characterized using single fiber pullout test. The microstructural characterization of fiber surface and fiber tunnel in the matrix was carried out to understand the fiber/matrix interface properties. The micromechanics-based assessment of critical fiber volume fraction required to achieve strain hardening was also conducted. The material sustainability of the developed composite was evaluated and compared with existing Portland cement-based strain hardening cementitious composites, and strategies to further reduce embodied carbon and primary energy were proposed. Ministry of Education (MOE) The authors acknowledge the financial assistance provided by the Singapore MOE Academic Research Fund Tier 2 (MOE2017-T2-1-087 (S)) and MOE NTUitive Gap Fund (NGF-2020-08-013) to conduct this research. 2023-10-23T07:31:22Z 2023-10-23T07:31:22Z 2023 Journal Article Sonat, C., Kumar, D., Koh, W. C., Li, J., Unluer, C. & Yang, E. (2023). Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume. Cement and Concrete Composites, 142, 105200-. https://dx.doi.org/10.1016/j.cemconcomp.2023.105200 0958-9465 https://hdl.handle.net/10356/171381 10.1016/j.cemconcomp.2023.105200 2-s2.0-85164222904 142 105200 en MOE2017-T2-1-087 (S) NGF-2020-08-013 Cement and Concrete Composites © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Low Fiber Dosage Micromechanics Sonat, Cem Kumar, Dhanendra Koh, Wee Chen Li, Junxia Unluer, Cise Yang, En-Hua Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume |
| title | Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume |
| title_full | Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume |
| title_fullStr | Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume |
| title_full_unstemmed | Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume |
| title_short | Strain hardening magnesium-silicate-hydrate composites with extremely low fiber dosage of 0.5% by volume |
| title_sort | strain hardening magnesium silicate hydrate composites with extremely low fiber dosage of 0 5 by volume |
| topic | Engineering::Civil engineering Low Fiber Dosage Micromechanics |
| url | https://hdl.handle.net/10356/171381 |
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