Visualization of the fibre dispersion in the steel fibre reinforced concrete using x-ray image

Ramiz Ahmed Raju, Sopokhem Lim, Takumi Kageyama, Mitsuyoshi Akiyama*

*この研究の対応する著者

研究成果: Conference contribution

抄録

Uniform distribution of fibres which are orientated parallel to the direction of tensile stress is essential to improve the structural performance of steel fibre reinforced concrete (SFRC) members. However, the fibre distribution in concrete structures is hardly uniform due to the effects of many parameters during the fabrication process (vibration, placing methods, concrete moulds, etc.) which can negatively affects their structural performance. The use of self-compacting concrete (SCC) instead of normal concrete can be a good alternative where the fibres can be aligned in the direction of flow without the use of vibration. This paper presents an effort for improving the structural performance of fibre-reinforced concrete members by utilizing the high-flowability and self-placability properties of SCC to achieve better distribution and orientation of fibres. In the experiment, the self-compacting fibre reinforced concrete (SCFRC) was flown into beams and the X-ray image was taken over the whole length of each specimen to investigate the effects of flow distance from the casting point on the distribution and orientation of fibres. In addition, other specimens were also fabricated using SFRC (with normal concrete). The bending tests were performed to observe the flexural performance of SCFRC and SFRC specimens. By the comparison of their structural performance, it was found that SCFRC ones provided better performance due to the more uniform distribution of fibres which were aligned in the flow direction of SCFRC.

本文言語English
ホスト出版物のタイトルConcrete Innovations in Materials, Design and Structures - Proceedings of the fib Symposium, 2019
編集者Wit Derkowski, Piotr Gwozdziewicz, Lukasz Hojdys, Piotr Krajewski, Marek Pantak
出版社fib. The International Federation for Structural Concrete
ページ351-357
ページ数7
ISBN(印刷版)9782940643004
出版ステータスPublished - 2019
イベントInternational fib Symposium on Concrete Innovations in Materials, Design and Structures, 2019 - Kraków, Poland
継続期間: 2019 5月 272019 5月 29

出版物シリーズ

名前fib Symposium
ISSN(印刷版)2617-4820

Conference

ConferenceInternational fib Symposium on Concrete Innovations in Materials, Design and Structures, 2019
国/地域Poland
CityKraków
Period19/5/2719/5/29

ASJC Scopus subject areas

  • 土木構造工学
  • 建築および建設
  • 材料科学(その他)

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