Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete
Notched beam specimens were loaded by the three-point bending test device, and the effects of different volume contents and combinations of steel fibers on the tensile properties of hybrid steel fiber–reinforced self-compacting concrete (HSFRSCC) were studied. The failure law and strain field distri...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/3/1114 |
| _version_ | 1797623987094683648 |
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| author | Chenjie Gong Lei Kang Wenhan Zhou Linghui Liu Mingfeng Lei |
| author_facet | Chenjie Gong Lei Kang Wenhan Zhou Linghui Liu Mingfeng Lei |
| author_sort | Chenjie Gong |
| collection | DOAJ |
| description | Notched beam specimens were loaded by the three-point bending test device, and the effects of different volume contents and combinations of steel fibers on the tensile properties of hybrid steel fiber–reinforced self-compacting concrete (HSFRSCC) were studied. The failure law and strain field distribution of the specimens were studied by digital image correlation (DIC) technology. Moreover, the curves between the load and crack mouth opening displacement (CMOD) of 18 groups of hybrid steel fiber–reinforced concrete specimens were obtained, and the stress–strain curves of 18 groups of specimens were derived from the load–CMOD curves. The results show that both single and hybrid steel fibers can improve the crack deformation resistance and tensile properties of concrete, but hybrid steel fibers have a more significant improvement effect. Only when the content of steel fiber is more than 0.6% can it have a more obvious postpeak descending section, and hybrid steel fiber has higher postpeak deformation capacity and flexural toughness. The fundamental reason why concrete with hybrid steel fibers has better tensile properties is that micro and macro steel fibers cooperate with each other to resist cracks, improving the toughness of concrete after cracking. Finally, the mechanism of different size and volume content of steel fiber was analyzed from the micro level, which can be used as a reference for the engineering design of HSFRSCC in the future. |
| first_indexed | 2024-03-11T09:36:30Z |
| format | Article |
| id | doaj.art-6a33712186174f61b8f3137bbe4a0868 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:36:30Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6a33712186174f61b8f3137bbe4a08682023-11-16T17:17:21ZengMDPI AGMaterials1996-19442023-01-01163111410.3390/ma16031114Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting ConcreteChenjie Gong0Lei Kang1Wenhan Zhou2Linghui Liu3Mingfeng Lei4School of Civil Engineering, Central South University, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaNotched beam specimens were loaded by the three-point bending test device, and the effects of different volume contents and combinations of steel fibers on the tensile properties of hybrid steel fiber–reinforced self-compacting concrete (HSFRSCC) were studied. The failure law and strain field distribution of the specimens were studied by digital image correlation (DIC) technology. Moreover, the curves between the load and crack mouth opening displacement (CMOD) of 18 groups of hybrid steel fiber–reinforced concrete specimens were obtained, and the stress–strain curves of 18 groups of specimens were derived from the load–CMOD curves. The results show that both single and hybrid steel fibers can improve the crack deformation resistance and tensile properties of concrete, but hybrid steel fibers have a more significant improvement effect. Only when the content of steel fiber is more than 0.6% can it have a more obvious postpeak descending section, and hybrid steel fiber has higher postpeak deformation capacity and flexural toughness. The fundamental reason why concrete with hybrid steel fibers has better tensile properties is that micro and macro steel fibers cooperate with each other to resist cracks, improving the toughness of concrete after cracking. Finally, the mechanism of different size and volume content of steel fiber was analyzed from the micro level, which can be used as a reference for the engineering design of HSFRSCC in the future.https://www.mdpi.com/1996-1944/16/3/1114hybrid steel fiber–reinforced self-compacting concretetensile propertiesDIC technologyfiber content |
| spellingShingle | Chenjie Gong Lei Kang Wenhan Zhou Linghui Liu Mingfeng Lei Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete Materials hybrid steel fiber–reinforced self-compacting concrete tensile properties DIC technology fiber content |
| title | Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete |
| title_full | Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete |
| title_fullStr | Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete |
| title_full_unstemmed | Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete |
| title_short | Tensile Performance Test Research of Hybrid Steel Fiber—Reinforced Self-Compacting Concrete |
| title_sort | tensile performance test research of hybrid steel fiber reinforced self compacting concrete |
| topic | hybrid steel fiber–reinforced self-compacting concrete tensile properties DIC technology fiber content |
| url | https://www.mdpi.com/1996-1944/16/3/1114 |
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