Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers
Magnesium-silicate-hydrate (M-S-H) cement has emerged as an alternative binder with potentially lower energy requirements and emissions. Due to the intrinsically low pH values of its matrix, however, normal steel reinforcement is not appropriate for M-S-H system. To toughen the matrix and to overcom...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/159450 |
| _version_ | 1824456166450659328 |
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| author | Sonat, Cem He, Shan Li, Junxia Unluer, Cise Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Sonat, Cem He, Shan Li, Junxia Unluer, Cise Yang, En-Hua |
| author_sort | Sonat, Cem |
| collection | NTU |
| description | Magnesium-silicate-hydrate (M-S-H) cement has emerged as an alternative binder with potentially lower energy requirements and emissions. Due to the intrinsically low pH values of its matrix, however, normal steel reinforcement is not appropriate for M-S-H system. To toughen the matrix and to overcome the brittle nature of the material, a new strain hardening magnesium-silicate-hydrate composite (SHMSHC) is developed for the first time by incorporating 2 vol% short and randomly oriented polyvinyl alcohol (PVA) microfibers. The resulting SHMSHC exhibits significant strain hardening with a tensile strain capacity of more than 3%, a compressive strength beyond 50 MPa and a tensile strength of around 3 MPa. Remarkably, saturated multiple cracking with a tight crack width less than 10 μm invisible to the human naked eyes was observed. The newly developed SHMSHC addresses the fundamental challenge of M-S-H binder and is expected to widen possible application areas of M-S-H system. |
| first_indexed | 2025-02-19T03:49:47Z |
| format | Journal Article |
| id | ntu-10356/159450 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:49:47Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1594502022-06-21T02:23:45Z Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers Sonat, Cem He, Shan Li, Junxia Unluer, Cise Yang, En-Hua School of Civil and Environmental Engineering Engineering::Civil engineering Strain Hardening Microsilica Magnesium-silicate-hydrate (M-S-H) cement has emerged as an alternative binder with potentially lower energy requirements and emissions. Due to the intrinsically low pH values of its matrix, however, normal steel reinforcement is not appropriate for M-S-H system. To toughen the matrix and to overcome the brittle nature of the material, a new strain hardening magnesium-silicate-hydrate composite (SHMSHC) is developed for the first time by incorporating 2 vol% short and randomly oriented polyvinyl alcohol (PVA) microfibers. The resulting SHMSHC exhibits significant strain hardening with a tensile strain capacity of more than 3%, a compressive strength beyond 50 MPa and a tensile strength of around 3 MPa. Remarkably, saturated multiple cracking with a tight crack width less than 10 μm invisible to the human naked eyes was observed. The newly developed SHMSHC addresses the fundamental challenge of M-S-H binder and is expected to widen possible application areas of M-S-H system. Ministry of Education (MOE) The authors acknowledge the financial support from the Singapore MOE Academic Research Fund Tier 2 (MOE2017-T2-1-087 (S)). 2022-06-21T02:23:45Z 2022-06-21T02:23:45Z 2021 Journal Article Sonat, C., He, S., Li, J., Unluer, C. & Yang, E. (2021). Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers. Cement and Concrete Research, 142, 106354-. https://dx.doi.org/10.1016/j.cemconres.2021.106354 0008-8846 https://hdl.handle.net/10356/159450 10.1016/j.cemconres.2021.106354 2-s2.0-85099366341 142 106354 en MOE2017-T2-1-087 (S) Cement and Concrete Research © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Strain Hardening Microsilica Sonat, Cem He, Shan Li, Junxia Unluer, Cise Yang, En-Hua Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| title | Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| title_full | Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| title_fullStr | Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| title_full_unstemmed | Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| title_short | Strain hardening magnesium-silicate-hydrate composites (SHMSHC) reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| title_sort | strain hardening magnesium silicate hydrate composites shmshc reinforced with short and randomly oriented polyvinyl alcohol microfibers |
| topic | Engineering::Civil engineering Strain Hardening Microsilica |
| url | https://hdl.handle.net/10356/159450 |
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