The use of recycled steel fibres from waste tyres as reinforcement in concrete matrix appears a promising solution thanks to the performance of the material in terms of toughness and post-cracking behaviour. The main objective of this paper is to analyse the bond behaviour between Recycled Steel Fibre Reinforced Concrete (RSFRC) and steel bars and to compare the results with those of Industrial Steel Fibres Reinforced Concrete (ISFRC). The paper focuses on the characterization of the mechanical properties of concrete reinforced with short steel fibres from waste tyres and on the results of pull-out tests executed both on RSFRC and ISFRC. The experimental results, in terms of failure mode, maximum bond stress and bond stress versus slip behaviour are analysed and discussed. Finally a theoretical analysis of the bond-slip behaviour has been performed. The experimental results show as most of the known performance of the ISFRC can be extended to RSFRC. Referring to the bond performance, an improved behaviour of RSFRC with respect to ISFRC in terms of bond-slip law has been observed.

Experimental Study on Bond Behavior in Fiber-Reinforced Concrete with Low Content of Recycled Steel Fiber

LEONE, Marianovella;CENTONZE, GIUSEPPE;COLONNA, DANIELE;MICELLI, Francesco;AIELLO, Maria Antonietta
2016-01-01

Abstract

The use of recycled steel fibres from waste tyres as reinforcement in concrete matrix appears a promising solution thanks to the performance of the material in terms of toughness and post-cracking behaviour. The main objective of this paper is to analyse the bond behaviour between Recycled Steel Fibre Reinforced Concrete (RSFRC) and steel bars and to compare the results with those of Industrial Steel Fibres Reinforced Concrete (ISFRC). The paper focuses on the characterization of the mechanical properties of concrete reinforced with short steel fibres from waste tyres and on the results of pull-out tests executed both on RSFRC and ISFRC. The experimental results, in terms of failure mode, maximum bond stress and bond stress versus slip behaviour are analysed and discussed. Finally a theoretical analysis of the bond-slip behaviour has been performed. The experimental results show as most of the known performance of the ISFRC can be extended to RSFRC. Referring to the bond performance, an improved behaviour of RSFRC with respect to ISFRC in terms of bond-slip law has been observed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/404345
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