Research on Fracture Properties of Ultra-High Strength Concrete with Polyformaldehyde Fibers

XIA Yanghao; YANG Dingyi; GAO Han; GUO Zirong; QIAN Yunfeng

doi:10.13204/j.gyjzG220032707

Volume 52 Issue 12

Dec. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(12): 179-185

XIA Yanghao, YANG Dingyi, GAO Han, GUO Zirong, QIAN Yunfeng. Research on Fracture Properties of Ultra-High Strength Concrete with Polyformaldehyde Fibers[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 179-185. doi: 10.13204/j.gyjzG220032707

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XIA Yanghao, YANG Dingyi, GAO Han, GUO Zirong, QIAN Yunfeng. Research on Fracture Properties of Ultra-High Strength Concrete with Polyformaldehyde Fibers[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 179-185. doi: 10.13204/j.gyjzG220032707

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Research on Fracture Properties of Ultra-High Strength Concrete with Polyformaldehyde Fibers

doi: 10.13204/j.gyjzG220032707

1. College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China;
2. Research Institute of Green Building Materials, Yangzhou University, Yangzhou 225127, China

Received Date: 2022-03-27
Available Online: 2023-03-22

Abstract

Abstract

To explore the influence of polyformaldehyde (POM) fibers on the fracture properties of ultra-high strength concrete (UHSC), the three-point bending beam method was used for fracture test, the influence of fiber length and fiber volume content on the UHSC crack toughness, instability of toughness, fracture energy and ductility indexes was studied. The experimental results showed that the addition of POM fibers could improve the fracture properties of UHSC. With the increase of fiber volume content and fiber length, the descending segment of P-δ_CMOD curve became fuller. When the fiber length was 12 mm and fiber content was 1.5%, the crack initiation toughness was improved most significantly. When the fiber length was 20 mm and the fiber content was 1.5%, the specimens' instability toughness, fracture energy and ductility indexes reached the maximum.
- polyformaldehyde fiber,
- ultra-high strength concrete,
- fracture toughness,
- fracture energy,
- ductility index

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References(32)

References

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