Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete
With the continuous development of the economy and society, the production of solid waste is increasing. Construction and demolition waste (CDW), used tires and silica fume are the main components of solid waste. Recycling these materials will reduce resource pressure, decrease carbon emissions and...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523003935 |
| _version_ | 1797798888026931200 |
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| author | Yanbin Yao Bojian Wu Wenjiao Zhang Ying Fu Xiangqing Kong |
| author_facet | Yanbin Yao Bojian Wu Wenjiao Zhang Ying Fu Xiangqing Kong |
| author_sort | Yanbin Yao |
| collection | DOAJ |
| description | With the continuous development of the economy and society, the production of solid waste is increasing. Construction and demolition waste (CDW), used tires and silica fume are the main components of solid waste. Recycling these materials will reduce resource pressure, decrease carbon emissions and protect the environment, while bringing certain economic benefits. This study focused on the influence of the synergistic effect of recycled steel fibers (RSF) and silica fume on the mechanical properties and impact resistance of recycled aggregate concrete (RAC). The mathematical statistical model of Weibull distribution was adopted to depict the impact results. In addition, the microstructure of the interfacial transition zone (ITZ) between the cement paste and the aggregate/fiber was researched by scanning electron microscopy (SEM). Results revealed that the synergistic effect of RSF and silica fume significantly improved the impact resistance of RAC. Especially the specimen containing 10% silica fume and 0.75% RSF performed the best properties, the first crack impact and failure impact energy increased by 421.9% and 461.3%, the net-gain in them by the synergistic action of silica fume and RSF with values of 102.7% and 115.3%. The distribution law of the impact life for RSF reinforced RAC can better describe by the two-parameter Weibull distribution function. Impact resistance life was predicted corresponding to reliability levels. SEM investigations revealed that the ITZ between cement and aggregate/RSF significantly improved by mixing silica fume. |
| first_indexed | 2024-03-13T04:11:00Z |
| format | Article |
| id | doaj.art-9e1a6ceb6b6e4252bf2cbe672b07ff96 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:11:00Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-9e1a6ceb6b6e4252bf2cbe672b07ff962023-06-21T06:54:56ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02213Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concreteYanbin Yao0Bojian Wu1Wenjiao Zhang2Ying Fu3Xiangqing Kong4School of Civil Engineering, Liaoning University of Technology, Jinzhou 121001, ChinaSchool of Civil Engineering, Liaoning University of Technology, Jinzhou 121001, ChinaSchool of Civil Engineering, Liaoning University of Technology, Jinzhou 121001, ChinaSongshan Lake Materials Laboratory, Dongguan 523808, ChinaSchool of Civil Engineering, Liaoning University of Technology, Jinzhou 121001, China; Corresponding author.With the continuous development of the economy and society, the production of solid waste is increasing. Construction and demolition waste (CDW), used tires and silica fume are the main components of solid waste. Recycling these materials will reduce resource pressure, decrease carbon emissions and protect the environment, while bringing certain economic benefits. This study focused on the influence of the synergistic effect of recycled steel fibers (RSF) and silica fume on the mechanical properties and impact resistance of recycled aggregate concrete (RAC). The mathematical statistical model of Weibull distribution was adopted to depict the impact results. In addition, the microstructure of the interfacial transition zone (ITZ) between the cement paste and the aggregate/fiber was researched by scanning electron microscopy (SEM). Results revealed that the synergistic effect of RSF and silica fume significantly improved the impact resistance of RAC. Especially the specimen containing 10% silica fume and 0.75% RSF performed the best properties, the first crack impact and failure impact energy increased by 421.9% and 461.3%, the net-gain in them by the synergistic action of silica fume and RSF with values of 102.7% and 115.3%. The distribution law of the impact life for RSF reinforced RAC can better describe by the two-parameter Weibull distribution function. Impact resistance life was predicted corresponding to reliability levels. SEM investigations revealed that the ITZ between cement and aggregate/RSF significantly improved by mixing silica fume.http://www.sciencedirect.com/science/article/pii/S2214509523003935Recycled steel fiberRecycled aggregate concreteImpact resistanceWeibull distributionMicrostructure |
| spellingShingle | Yanbin Yao Bojian Wu Wenjiao Zhang Ying Fu Xiangqing Kong Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete Case Studies in Construction Materials Recycled steel fiber Recycled aggregate concrete Impact resistance Weibull distribution Microstructure |
| title | Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete |
| title_full | Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete |
| title_fullStr | Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete |
| title_full_unstemmed | Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete |
| title_short | Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete |
| title_sort | experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete |
| topic | Recycled steel fiber Recycled aggregate concrete Impact resistance Weibull distribution Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523003935 |
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