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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the fib Symposium 2019
Subtitle of host publicationConcrete - Innovations in Materials, Design and Structures
EditorsWit Derkowski, Piotr Krajewski, Piotr Gwozdziewicz, Marek Pantak, Lukasz Hojdys
PublisherInternational Federation for Structural Concrete
Pages351-357
Number of pages7
ISBN (Electronic)9782940643004
Publication statusPublished - 2019 Jan 1
Eventfib Symposium 2019: Concrete - Innovations in Materials, Design and Structures - Krakow, Poland
Duration: 2019 May 272019 May 29

Publication series

NameProceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

Conference

Conferencefib Symposium 2019: Concrete - Innovations in Materials, Design and Structures
CountryPoland
CityKrakow
Period19/5/2719/5/29

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Keywords

  • Concrete flow
  • Fibre dispersion
  • Self-compacting concrete
  • Steel fibre
  • X-ray image

ASJC Scopus subject areas

  • Building and Construction
  • Architecture
  • Civil and Structural Engineering

Cite this

Raju, R. A., Lim, S., Kageyama, T., & Akiyama, M. (2019). Visualization of the fibre dispersion in the steel fibre reinforced concrete using X-ray image. In W. Derkowski, P. Krajewski, P. Gwozdziewicz, M. Pantak, & L. Hojdys (Eds.), Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures (pp. 351-357). (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures). International Federation for Structural Concrete.