International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Anchorage Effects of Various Steel Fibre Architectures for Concrete Reinforcement

  • Abdallah, Sadoon (Department of Civil Engineering, Brunel University) ;
  • Fan, Mizi (Department of Civil Engineering, Brunel University) ;
  • Zhou, Xiangming (Department of Civil Engineering, Brunel University) ;
  • Geyt, Simon Le (Department of Civil Engineering, Brunel University)
  • Received : 2016.01.11
  • Accepted : 2016.05.02
  • Published : 2016.09.30
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Abstract

This paper studies the effects of steel fibre geometry and architecture on the cracking behaviour of steel fibre reinforced concrete (SFRC), with the reinforcements being four types, namely 5DH ($Dramix^{(R)}$ hooked-end), 4DH, 3DH-60 and 3DH-35, of various hooked-end steel fibres at the fibre dosage of 40 and $80kg/m^3$. The test results show that the addition of steel fibres have little effect on the workability and compressive strength of SFRC, but the ultimate tensile loads, post-cracking behaviour, residual strength and the fracture energy of SFRC are closely related to the shapes of fibres which all increased with increasing fibre content. Results also revealed that the residual tensile strength is significantly influenced by the anchorage strength rather than the number of the fibres counted on the fracture surface. The 5DH steel fibre reinforced concretes have behaved in a manner of multiple crackings and more ductile compared to 3DH and 4DH ones, and the end-hooks of 4DH and 5DH fibres partially deformed in steel fibre reinforced self-compacting concrete (SFR-SCC). In practice, 5DH fibres should be used for reinforcing high or ultra-high performance matrixes to fully utilize their high mechanical anchorage.

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References

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