Experimental study on shear behavior of steel fiber-rubber/concrete

ZHAO Qiuhong; DONG Shuo; ZHU Han

doi:10.13801/j.cnki.fhclxb.20200507.005

Volume 37 Issue 12

Dec. 2020

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ZHAO Qiuhong, DONG Shuo, ZHU Han. Experimental study on shear behavior of steel fiber-rubber/concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(12): 3201-3213. doi: 10.13801/j.cnki.fhclxb.20200507.005

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ZHAO Qiuhong, DONG Shuo, ZHU Han. Experimental study on shear behavior of steel fiber-rubber/concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(12): 3201-3213. doi: 10.13801/j.cnki.fhclxb.20200507.005

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Experimental study on shear behavior of steel fiber-rubber/concrete

doi: 10.13801/j.cnki.fhclxb.20200507.005

ZHAO Qiuhong^{1, 2
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DONG Shuo^1
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ZHU Han^{1, 2
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1.
School of Civil Engineering, Tianjin University, Tianjin 300072, China
2.
Key Laboratory of Coastal CivilStructure and Safety of China Ministry of Education, Tianjin University, Tianjin 300350, China

Received Date: 2020-02-22
Accepted Date: 2020-04-15

Available Online: 2020-05-07

Publish Date: 2020-12-15

Abstract

Abstract

Shear strength and toughness are important indices for evaluating load-resisting capacity and energy absorption of members under complex loading conditions. In order to study the shear-resisting capacity of high-strength steel fiber(SF)-rubber/concrete, 14 sets of SF-rubber/concrete specimens were designed for double-shear experiments, in which influence of parameters including SF volume fraction, rubber volume substation and water to binder ratio on the shear-resisting behavior and failure modes of SF-rubber/concrete were investigated. Research results show that the bridging action of SF and its positive synergy with rubber particles in SF-rubber/concrete can significantly improve the shear-resisting behavior of concrete. SF play a dominant role in shear-resisting behavior of SF-rubber/concrete specimens. The shear strength, deformation at peak load and shear toughness of SF-rubber/concrete specimens are significantly higher than the plain concrete and rubberized concrete specimens, which increase with the SF volume fraction, and the shear failure mode of SF-rubber/concrete is obviously ductile. When the SF volume fraction is 1.5vol% and the rubber content (volume substitution of sand) is 10%, the shear strength and deformation at peak load of SF-rubber/concrete specimens are 78% and 63% respectively, higher than those of the rubber concrete. Rubber particles also help to improve the shear-resisting behavior of SF-rubber/concrete. The shear toughness and ductility of SF-rubber/concrete are further increased compared with SF reinforced concrete. With the increase of rubber content, the shear strength, peak deformation and pre-peak shear toughness of SF-rubber/concrete can be unchanged after using the optimized water-binder ratio, while the post-peak toughness index can be further increased by 96%. Based on the test results, shear strength formula of SF-rubber/concrete was established considering the influence of SF volume fraction and rubber substitution.
- steel fiber-rubber/concrete,
- double shear test,
- steel fiber volume fraction,
- rubber particles volume substation,
- shear-resisting capacity,
- shear toughness
Long Abstrsct
Innovation Points

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References(21)

References

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