Distribution and orientation of steel fibres in steel fibre reinforced concrete

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Abstract

The use of fibres to reinforce brittle materials for better performance has been employed since time immemorial. Therefore, inclusion of steel fibres in concrete has always improved the post-cracking strength and concrete ductility to a large extent while full potential of steel fibre reinforced concrete (SFRC) is still yet to be exploited in practice. This study investigated the effects of fibre type, dosage and maximum aggregate size on distribution and orientation and hence, the flexural performance of steel fibre reinforced concrete. Hooked-end steel fibres with 50 mm and 60 mm length, aspect ratio of 45, 65 and 80, and dosages of 0 kg/m³, 25 kg/m³, 40 kg/m³, 50 kg/m³ and 60 kg/m³ were used with maximum sizes of coarse aggregate of 10mm and 20mm. X-ray Computed Tomography was employed for imaging cores taken from the slab specimens after testing. The experimental results show a remarkable improvements in flexural strength up to 83% observed at larger dosage of steel fibre and when good interaction leading to better distribution and orientation of fibres within concrete matrix is sustained between right fibre geometry and appropriately sized aggregate.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Advances in Civil, Structural and Construction Engineering
Subtitle of host publicationCSCE 2016
EditorsRakesh Kumar
PublisherIRED
Pages43-47
ISBN (Print)978-1-63248-101-6
Publication statusPublished - 19 Aug 2016
Event4th International Conference on Advances in Civil, Structural and Construction Engineering - Rome, Italy
Duration: 18 Aug 201619 Aug 2016

Conference

Conference4th International Conference on Advances in Civil, Structural and Construction Engineering
Abbreviated title(CSCE)
Country/TerritoryItaly
CityRome
Period18/08/1619/08/16

Keywords

  • Concrete
  • Flexural properties
  • Steel fibres
  • Aggregate size
  • Fibre distribution and orientation

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