Experimental Study on Mechanical Properties of Hybrid Fiber-Reinforced Manufactured Sand Concrete

WANG Xin; HUANG Leiqun; QIN Weiheng; LIAO Haoyu; CHEN Zongping

doi:10.13204/j.gyjzG22052305

Volume 53 Issue 7

Jul. 2023

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WANG Xin, HUANG Leiqun, QIN Weiheng, LIAO Haoyu, CHEN Zongping. Experimental Study on Mechanical Properties of Hybrid Fiber-Reinforced Manufactured Sand Concrete[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(7): 199-208. doi: 10.13204/j.gyjzG22052305

Citation:

WANG Xin, HUANG Leiqun, QIN Weiheng, LIAO Haoyu, CHEN Zongping. Experimental Study on Mechanical Properties of Hybrid Fiber-Reinforced Manufactured Sand Concrete[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(7): 199-208. doi: 10.13204/j.gyjzG22052305

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Experimental Study on Mechanical Properties of Hybrid Fiber-Reinforced Manufactured Sand Concrete

doi: 10.13204/j.gyjzG22052305

1. Guangxi Vocational and Technical College of Communications, Nanning 530023, China;
2. Guangxi Road and Bridge Engineering Group Co., Ltd., Nanning 530002, China;
3. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China

Received Date: 2022-05-23

Abstract

Abstract

To study the mechanical properties of hybrid fiber-reinforced manufactured sand concrete, a tatal of 54 specimens were designed and fabricated for static compression tests taking manufactured sand substitution ratios (0%, 50%, 100%) and types of hybrid fibers (steel-basalt fibres, steel-polypropylene fibres) as variation parameters. The stress damage processes and patterns of the specimens were observed and the load-displacement curves were obtained. The cubic compressive, cylinder compressive, elastic modulus peak strain, uniaxial strain-stress curve and energy transformation relation of concrete were measured. The results showed that addition of fibers could change the failure mode of concrete from brittleness to ductility, while addition of manufactured sand had little effect on failure modes of concrete. Addition of fibers improved the mechanical properties of concrete. With the manufactured sand substitution ratios increased, the enhanced effect of fibers on compressive strength and elastic moduli of concrete decreased. The elastic energy release ratios and dissipation energy increase ratios of manufactured sand concrete were smaller than that of conventional concrete when crack propagated. Comparatively, the hybridization of steel fibers and basalt fibers was more conducive to improve compression property of concrete than the hybridization of steel and polypropylene fibers. Finally, the formulas for predicting the mechanical indices and constitutive model were proposed, and the calculated results were in good agreement with experimental results.
- hybrid fiber,
- manufactured sand concrete,
- compression test,
- mechanical property,
- stress-strain relation

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References(22)

References

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