Mechanical properties of recycled steel fiber reinforced ultra-high-performance concrete

被引：0
|
作者：
Yang J. [1 ]
Peng G. [1 ]
Shui G. [1 ]
机构：
[1] Faculty of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2019年 / 36卷 / 08期
关键词：
Compressive strength; Elastic modulus; Fracture energy; Normal steel fiber; Recycled steel fiber; Splitting tensile strength; Ultra-high-performance concrete;
D O I：
10.13801/j.cnki.fhclxb.20180921.001
中图分类号：
学科分类号：
摘要：
Two types of recycled steel fiber from waste tires were used to prepare ultra-high-performance concrete (UHPC) containing coarse aggregate and their mechanical properties, including compressive strength, splitting tensile strength, fracture energy and static elastic modulus were determined. Plain UHPC without steel fiber and UHPC with different types of normal commercial steel fibers were also prepared for comparison. The results indicate that the recycled steel fiber without rubber particles has a slightly negative effect on the compressive strength of UHPC with a decrease of 3.91% and other types of steel fiber can improve the mechanical properties of UHPC. The recycled steel fiber with rubber particles significantly improves the fracture energy of UHPC and is approximately 4 times as high as that of the normal steel fiber. Additionally, the improvement of the recycled steel fiber on the splitting tensile strength and static elastic modulus of UHPC is superior to that of the normal steel fiber. This suggests that the recycled steel fiber especially that with rubber particles can be a toughening material used in concrete, and can substitute for the normal commercial steel fiber to be applied in UHPC engineering. © 2019, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：1949 / 1956
页数：7
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