Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates
In order to increase environmental sustainability and to address the issue of construction and demolition (C&D) wastes accumulation, this study investigates the feasibility of using recycled fine aggregates (RFA) as a substitute to fully replace fine silica sand (FSS) in the production strain-ha...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525006679 |
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| author | Rui-Yang Ma Zhi-Liang Zhang Jing-Hao Wei Feng-Yi Zhuo Han Zhang Fan Jiang Xiao-Hua Ji Yi-Nong Shen Ji-Xiang Zhu |
| author_facet | Rui-Yang Ma Zhi-Liang Zhang Jing-Hao Wei Feng-Yi Zhuo Han Zhang Fan Jiang Xiao-Hua Ji Yi-Nong Shen Ji-Xiang Zhu |
| author_sort | Rui-Yang Ma |
| collection | DOAJ |
| description | In order to increase environmental sustainability and to address the issue of construction and demolition (C&D) wastes accumulation, this study investigates the feasibility of using recycled fine aggregates (RFA) as a substitute to fully replace fine silica sand (FSS) in the production strain-hardening ultra-high-performance concrete (SH-UHPC). Results showed that RFA-based SH-UHPC with hybrid fiber reinforcement achieved comparable compressive strength (over 100 MPa), and an impressive enhancement on tensile ductility by 68.3 %. Microstructural analyses via SEM, X-CT and microhardness test revealed that due to the lower intrinsic hardness of RFA more internal cracks were observed RFA-based SH-UHPC, indicating the role of RFA as active flaws in high strength matrix of SH-UHPC resulting in more saturated multiple cracking and enhanced strain-hardening behavior. In the end, the strategic utilization of RFA not only improves mechanical performance but also lowers overall environmental impacts, which highlights the sustainable and effective use of C&D wastes for developing greener high-performance construction materials. |
| format | Article |
| id | doaj-art-ffc5de5e819748aabbaa61a6251cb731 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-ffc5de5e819748aabbaa61a6251cb7312025-08-20T03:26:31ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0486910.1016/j.cscm.2025.e04869Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregatesRui-Yang Ma0Zhi-Liang Zhang1Jing-Hao Wei2Feng-Yi Zhuo3Han Zhang4Fan Jiang5Xiao-Hua Ji6Yi-Nong Shen7Ji-Xiang Zhu8Institute of Advanced Engineering Structures, Zhejiang University, Hangzhou, ChinaInstitute of Advanced Engineering Structures, Zhejiang University, Hangzhou, China; School of Resources and Civil Engineering, Northeastern University, Shenyang, China; Corresponding author at: Institute of Advanced Engineering Structures, Zhejiang University, Hangzhou, China.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, ChinaCollege of Civil Engineering and Architecture, Zhejiang University, Hangzhou, ChinaInstitute of Advanced Engineering Structures, Zhejiang University, Hangzhou, ChinaThe Architectural Design & Research Institute of Zhejiang University, Hangzhou, ChinaCollege of Civil Engineering and Architecture, Zhejiang University, Hangzhou, ChinaSchool of Civil & Environmental Engineering and Geography Science, Ningbo University, Ningbo, China; Ningbo Key Laboratory of Energy Geostructure, Ningbo University, Ningbo, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong; Corresponding author.In order to increase environmental sustainability and to address the issue of construction and demolition (C&D) wastes accumulation, this study investigates the feasibility of using recycled fine aggregates (RFA) as a substitute to fully replace fine silica sand (FSS) in the production strain-hardening ultra-high-performance concrete (SH-UHPC). Results showed that RFA-based SH-UHPC with hybrid fiber reinforcement achieved comparable compressive strength (over 100 MPa), and an impressive enhancement on tensile ductility by 68.3 %. Microstructural analyses via SEM, X-CT and microhardness test revealed that due to the lower intrinsic hardness of RFA more internal cracks were observed RFA-based SH-UHPC, indicating the role of RFA as active flaws in high strength matrix of SH-UHPC resulting in more saturated multiple cracking and enhanced strain-hardening behavior. In the end, the strategic utilization of RFA not only improves mechanical performance but also lowers overall environmental impacts, which highlights the sustainable and effective use of C&D wastes for developing greener high-performance construction materials.http://www.sciencedirect.com/science/article/pii/S2214509525006679Strain-hardening ultra-high-performance concrete (SH-UHPC)Recycled fine aggregates (RFA)Hybrid fiberMultiple crackingC&D wastes |
| spellingShingle | Rui-Yang Ma Zhi-Liang Zhang Jing-Hao Wei Feng-Yi Zhuo Han Zhang Fan Jiang Xiao-Hua Ji Yi-Nong Shen Ji-Xiang Zhu Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates Case Studies in Construction Materials Strain-hardening ultra-high-performance concrete (SH-UHPC) Recycled fine aggregates (RFA) Hybrid fiber Multiple cracking C&D wastes |
| title | Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates |
| title_full | Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates |
| title_fullStr | Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates |
| title_full_unstemmed | Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates |
| title_short | Hybrid-fiber-reinforced strain-hardening ultra-high-performance concrete (SH-UHPC) with recycled fine aggregates |
| title_sort | hybrid fiber reinforced strain hardening ultra high performance concrete sh uhpc with recycled fine aggregates |
| topic | Strain-hardening ultra-high-performance concrete (SH-UHPC) Recycled fine aggregates (RFA) Hybrid fiber Multiple cracking C&D wastes |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525006679 |
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