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...

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Main Authors: Sonat, Cem, He, Shan, Li, Junxia, Unluer, Cise, Yang, En-Hua
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/159450
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.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.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Strain Hardening
Microsilica
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
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.
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
format Article
author Sonat, Cem
He, Shan
Li, Junxia
Unluer, Cise
Yang, En-Hua
author_sort Sonat, Cem
title 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_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_sort strain hardening magnesium-silicate-hydrate composites (shmshc) reinforced with short and randomly oriented polyvinyl alcohol microfibers
publishDate 2022
url https://hdl.handle.net/10356/159450
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