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Techno-Eco-Efficiency Assessment of Using Recycled Steel Fibre in Concrete

Author

Listed:
  • Wahidul K. Biswas

    (Sustainable Engineering Group, Curtin University, Perth, WA 6102, Australia)

  • Xihong Zhang

    (School of Civil and Mechanical Engineering, Curtin University, Perth, WA 6102, Australia)

  • Corey Matters

    (Rubbergem, Naval Base, Perth, WA 6165, Australia)

  • Mitra Maboud

    (Rubbergem, Naval Base, Perth, WA 6165, Australia)

Abstract

The steel industry is one the three biggest producers of carbon dioxide and it is experiencing technical challenges due to the gradual decrease in the quality of iron ore. Steel is extensively used in the construction industry for structural applications like steel components, while steel fibres are intensively used as additives to concrete in order to improve its performance. It is thus important to consider the use of recycled steel as a replacement for virgin steel in order to address the aforementioned environmental consequences. This paper applies the eco-efficiency framework to determine the economic and environmental implications of the use of recycled fibre in concrete as a replacement for virgin steel. A number of concrete mixes were considered that used virgin, recycled, and treated recycled rebar in concrete. The eco-efficiency framework, which uses a life-cycle assessment approach to calculate the environmental and economic values of concrete mixes in order to determine the portfolio positions of these concrete mixes, was used for comparison purposes and to establish the eco-efficient option(s). Whilst the recovery and recycling process is energy-intensive, the use of recycled steel fibre in reinforced concrete has been found to be eco-efficient and deliver the same level of mechanical performance compared to that obtained using virgin steel fibre. Treating steel fibre could improve its technical performance, but it was found to increase both costs and environmental impacts and was therefore identified as not being eco-efficient.

Suggested Citation

  • Wahidul K. Biswas & Xihong Zhang & Corey Matters & Mitra Maboud, 2024. "Techno-Eco-Efficiency Assessment of Using Recycled Steel Fibre in Concrete," Sustainability, MDPI, vol. 16(9), pages 1-15, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:9:p:3717-:d:1385606
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    References listed on IDEAS

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