Mix Proportion Optimization Design and Microstructure Study of UHPC Containing Polyvinyl Alcohol Fibers Based on Response Surface Method

LAI Guanghong; SUN Zhenghe; LIAO Feiyu; CHEN Yufeng; ZHANG Siya

doi:10.3724/j.gyjzG24022808

Volume 54 Issue 11

Nov. 2024

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LAI Guanghong, SUN Zhenghe, LIAO Feiyu, CHEN Yufeng, ZHANG Siya. Mix Proportion Optimization Design and Microstructure Study of UHPC Containing Polyvinyl Alcohol Fibers Based on Response Surface Method[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(11): 87-94. doi: 10.3724/j.gyjzG24022808

Citation:

LAI Guanghong, SUN Zhenghe, LIAO Feiyu, CHEN Yufeng, ZHANG Siya. Mix Proportion Optimization Design and Microstructure Study of UHPC Containing Polyvinyl Alcohol Fibers Based on Response Surface Method[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(11): 87-94. doi: 10.3724/j.gyjzG24022808

Citation:

LAI Guanghong, SUN Zhenghe, LIAO Feiyu, CHEN Yufeng, ZHANG Siya. Mix Proportion Optimization Design and Microstructure Study of UHPC Containing Polyvinyl Alcohol Fibers Based on Response Surface Method[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(11): 87-94. doi: 10.3724/j.gyjzG24022808

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Mix Proportion Optimization Design and Microstructure Study of UHPC Containing Polyvinyl Alcohol Fibers Based on Response Surface Method

doi: 10.3724/j.gyjzG24022808

1. College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China;
2. Fujian Construction Engineering Group Company, Fuzhou 350003, China

Received Date: 2024-02-28
Available Online: 2024-12-05

Abstract

Abstract

To explore the influence of polyvinyl alcohol fibers (PVA fibers) on the mechanical properties of ultra-high performance concrete (UHPC), this work adopted the Box-Behnken test design method in the response surface method to construct a quadratic polynomial regression model and studied the effects of different binder-sand ratio, dosage of silica fume, dosage of fly ash, and dosage of metakaolin on the compressive strength of UHPC matrix. The optimum ratio of UHPC containing PVA fibers was obtained by optimizing the design, and the microstructure of UHPC containing PVA fibers was described by scanning electron microscope (SEM). The results showed that the binder-sand ratio had the greatest influence on the compressive strength of UHPC matrix, followed by the dosage of fly ash, and the dosage of silica fume and metakaolin had a smaller influence; the compressive strength of the UHPC matrix reached its maximum value when the cement-sand ratio was 1.10, the silica fume dosing was 4.70%, the fly ash dosing was 18.30%, and the metakaolin dosing was 6.55%, at which time the 28 d compressive strength and tensile strength of the UHPC containing PVA fibers were 122 MPa and 11.5 MPa, respectively; PVA fibers showed good bonding performance with the matrix, had a denser microstructure, and exhibited excellent mechanical properties, especially in tensile properties.
- response surface method,
- PVA fibers,
- mix proportion optimization,
- compressive strength,
- microstructure

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References(21)

References

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