Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites
Recycled wood fiber (RWF) obtained through the multi-stage processing of waste wood serves as an eco-friendly green construction material, exhibiting lightweight, porous, and high toughness characteristics that demonstrate significant potential as a cementitious reinforcement, offering strategic adv...
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MDPI AG
2025-06-01
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| Series: | Nanomaterials |
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| author | Chunyu Ma Liang Wang Yujiao Li Qiuyi Li Gongbing Yue Yuanxin Guo Meinan Wang Xiaolong Zhou |
| author_facet | Chunyu Ma Liang Wang Yujiao Li Qiuyi Li Gongbing Yue Yuanxin Guo Meinan Wang Xiaolong Zhou |
| author_sort | Chunyu Ma |
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| description | Recycled wood fiber (RWF) obtained through the multi-stage processing of waste wood serves as an eco-friendly green construction material, exhibiting lightweight, porous, and high toughness characteristics that demonstrate significant potential as a cementitious reinforcement, offering strategic advantages for environmental protection and resource recycling. In this study, high-performance sulfoaluminate cement (SAC)-RWF composites prepared by modifying RWFs with nano-silica (NS) and a silane coupling agent (KH560) were developed and their effects on mechanical properties, shrinkage behavior, hydration characteristics, and microstructure of SAC-RWF composites were systematically investigated. Optimal performance was achieved at water–cement ratio of 0.5 with 20% RWF content, where the KH560-modified samples showed superior improvement, with 8.5% and 14.3% increases in 28 d flexural and compressive strength, respectively, compared to the control groups, outperforming the NS-modified samples (3.6% and 8.6% enhancements). Both modifiers improved durability, reducing water absorption by 6.72% (NS) and 7.1% (KH560) while decreasing drying shrinkage by 4.3% and 27.2%, respectively. The modified SAC composites maintained favorable thermal properties, with NS reducing thermal conductivity by 6.8% through density optimization, whereas the KH560-treated specimens retained low conductivity despite slight density increases. Micro-structural tests revealed accelerated hydration without new hydration product formation, with both modifiers enhancing cementitious matrix hydration product generation by distinct mechanisms—with NS acting through physical pore-filling, while KH560 established Si-O-C chemical bonds at paste interfaces. Although both modifications improved mechanical properties and durability, the KH560-modified SAC composite group demonstrated superior overall performance than the NS-modified group, providing a technical pathway for developing sustainable, high-performance recycled wood fiber cement-based materials with balanced functional properties for low-carbon construction applications. |
| format | Article |
| id | doaj-art-370f1dbdb59c44ef9564601bb5052dda |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-370f1dbdb59c44ef9564601bb5052dda2025-08-20T02:36:28ZengMDPI AGNanomaterials2079-49912025-06-01151399310.3390/nano15130993Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based CompositesChunyu Ma0Liang Wang1Yujiao Li2Qiuyi Li3Gongbing Yue4Yuanxin Guo5Meinan Wang6Xiaolong Zhou7College of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaCollege of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, ChinaRecycled wood fiber (RWF) obtained through the multi-stage processing of waste wood serves as an eco-friendly green construction material, exhibiting lightweight, porous, and high toughness characteristics that demonstrate significant potential as a cementitious reinforcement, offering strategic advantages for environmental protection and resource recycling. In this study, high-performance sulfoaluminate cement (SAC)-RWF composites prepared by modifying RWFs with nano-silica (NS) and a silane coupling agent (KH560) were developed and their effects on mechanical properties, shrinkage behavior, hydration characteristics, and microstructure of SAC-RWF composites were systematically investigated. Optimal performance was achieved at water–cement ratio of 0.5 with 20% RWF content, where the KH560-modified samples showed superior improvement, with 8.5% and 14.3% increases in 28 d flexural and compressive strength, respectively, compared to the control groups, outperforming the NS-modified samples (3.6% and 8.6% enhancements). Both modifiers improved durability, reducing water absorption by 6.72% (NS) and 7.1% (KH560) while decreasing drying shrinkage by 4.3% and 27.2%, respectively. The modified SAC composites maintained favorable thermal properties, with NS reducing thermal conductivity by 6.8% through density optimization, whereas the KH560-treated specimens retained low conductivity despite slight density increases. Micro-structural tests revealed accelerated hydration without new hydration product formation, with both modifiers enhancing cementitious matrix hydration product generation by distinct mechanisms—with NS acting through physical pore-filling, while KH560 established Si-O-C chemical bonds at paste interfaces. Although both modifications improved mechanical properties and durability, the KH560-modified SAC composite group demonstrated superior overall performance than the NS-modified group, providing a technical pathway for developing sustainable, high-performance recycled wood fiber cement-based materials with balanced functional properties for low-carbon construction applications.https://www.mdpi.com/2079-4991/15/13/993recycled wood fiberrapid-hardening sulfoaluminate cementnano-silica modificationsilane coupling agenthydration properties |
| spellingShingle | Chunyu Ma Liang Wang Yujiao Li Qiuyi Li Gongbing Yue Yuanxin Guo Meinan Wang Xiaolong Zhou Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites Nanomaterials recycled wood fiber rapid-hardening sulfoaluminate cement nano-silica modification silane coupling agent hydration properties |
| title | Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites |
| title_full | Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites |
| title_fullStr | Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites |
| title_full_unstemmed | Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites |
| title_short | Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites |
| title_sort | effect of nano modified recycled wood fibers on the micro macro properties of rapid hardening sulfoaluminate cement based composites |
| topic | recycled wood fiber rapid-hardening sulfoaluminate cement nano-silica modification silane coupling agent hydration properties |
| url | https://www.mdpi.com/2079-4991/15/13/993 |
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