Title: An experimental investigation on the post-cracking behaviour of Recycled Steel Fibre Reinforced Concrete
Author(s): Frazão, C.; Barros, J.; Bogas, A.; Pilakoutas, K.; de Sousa, C.M.
Publication: Symposium Paper
Appears on pages(s): 262-271
Keywords: Recycled steel fibres, industrial steel fibres, RSFRC, ISFRC, post-cracking behaviour.
Steel fibres resulting from the industry of tyre recycling can be efficiently employed for the
reinforcement of concrete structures. Recycled Steel Fibre Reinforced Concrete (RSFRC) is a
promising candidate with technical, environmental and economic benefits for the
development of ductile, high strength and durable structural elements.
The heterogeneity of the geometry of each Recycled Steel Fibre (RSF) due to the recycling
process of the tires, can provide a plurality of strengthening mechanisms to concrete that
promote efficiency and durability, as long as the RSFRC composition is carefully adjusted to
the presence of RSF.
For assessing the potentialities of recycled steel fibres (RSF) as concrete reinforcement, an
experimental program was performed in the present study by comparing the following
properties of concrete reinforced with industrial steel fibres (ISF) and with RSF: compressive
strength, modulus of elasticity, flexural strength, flexural toughness and indirect tensile
The obtained results suggest that RSF reinforcement can significantly reduce the brittle
behaviour of concrete by improving its toughness and post-cracking resistance. For the
adopted industrial and recycled fibres, the last ones have not presented inferior post-cracking
strengthening performance than the first ones.