Bonding Mechanical Properties Between Ceramsite Concrete with Hybrid Fibers of Steel and Polypropylene and Threaded Rebars

ZHU Hongbing; ZHANG Na; YU Zhiwu; JIANG Lizhong; XU Wenkang

doi:10.13204/j.gyjzG21071801

Volume 52 Issue 2

Feb. 2022

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ZHU Hongbing, ZHANG Na, YU Zhiwu, JIANG Lizhong, XU Wenkang. Bonding Mechanical Properties Between Ceramsite Concrete with Hybrid Fibers of Steel and Polypropylene and Threaded Rebars[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 32-36,114. doi: 10.13204/j.gyjzG21071801

Citation:

ZHU Hongbing, ZHANG Na, YU Zhiwu, JIANG Lizhong, XU Wenkang. Bonding Mechanical Properties Between Ceramsite Concrete with Hybrid Fibers of Steel and Polypropylene and Threaded Rebars[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 32-36,114. doi: 10.13204/j.gyjzG21071801

Citation:

ZHU Hongbing, ZHANG Na, YU Zhiwu, JIANG Lizhong, XU Wenkang. Bonding Mechanical Properties Between Ceramsite Concrete with Hybrid Fibers of Steel and Polypropylene and Threaded Rebars[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 32-36,114. doi: 10.13204/j.gyjzG21071801

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Bonding Mechanical Properties Between Ceramsite Concrete with Hybrid Fibers of Steel and Polypropylene and Threaded Rebars

doi: 10.13204/j.gyjzG21071801

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;
2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China

Received Date: 2021-07-18
Available Online: 2022-06-30
Publish Date: 2022-02-20

Abstract

Abstract

In order to study the bond properties between ceramsite concrete roinforced with hybrid fibers of steel and polypropylene and threaded rebars, the cubic compressive strength and splitting tensile strength tests of 16 groups of ceramsite concrete with different hybrid fiber porportion were conducted. The variation of mechanical properties of concrete with hybrid fiber porportion was obtained. The ultimate bond strength, peak slip and failure mode of threaded rebars and concrete were obtained through the bond performance test of rebars and concrete. Based on the measured bond strength data, a formula for calculating the ultimate bond strength of ceramsite concrete with the hybrid fibers was established. The formula took into account the cubic compressive strength of ceramsite concrete without fibers, the characteristic parameters of steel and polypropylene fibers, the diameter of steel bars, the thickness of concrete covers and the bond length. Based on the measured bond strength and slip values, a three-stage (ascending, horizontal and descending) bond slip model was proposed to describe the bond property of ceramsite concrete with the hybrid fibers of steel and polypropylene and threaded rebars.
- ceramsite concrete with hybird fibers,
- threaded rebar,
- central pull-out test,
- bond strength,
- bond slip model

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References(16)

References

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