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Global warming potential (GWP) is an important environmental concern nowadays. To address this issue, the present study examines alternative fibers as a replacement for steel fibers in producing Ultra-High-Performance Concrete (UHPC) to reduce CO2 emissions and GWP. The research investigates five alternative fiber types—polypropylene, polyvinyl alcohol, polyethylene terephthalate, alkali-resistant glass, and carbon fibers—integrated into various UHPC mixtures. A life cycle assessment framework was applied to assess the environmental impacts of these UHPC mixtures, focusing on key factors such as GWP, resource use, and other critical environmental damage categories. The results reveal that incorporating polypropylene and polyethylene terephthalate fibers in UHPC mixtures contributes to the greatest reduction in GWP, by more than 28% compared to conventional steel fiber-reinforced UHPC, while maintaining comparable mechanical performance and structural functionality. Polyvinyl alcohol and alkali-resistant glass fibers lead to moderate reductions in environmental impacts, and carbon fibers show limited environmental benefits due to high production energy demands. This investigation highlights the substantial environmental benefits of replacing steel fibers in UHPC with innovative, low-impact fibers. These findings show the potential for more environmentally friendly construction and support the development of more sustainable practices in concrete production, advancing global sustainability goals.

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Reducing CO2 Emissions Through Fiber Substitution in Ultra-High-Performance Concrete

  • 会议论文

  • 发表日期：

    2026年

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  • Leila Farahzadi,
  • Saeed Bozorgmehr Nia,
  • Behrouz Shafei,
  • Mahdi Kioumarsi

摘要

Global warming potential (GWP) is an important environmental concern nowadays. To address this issue, the present study examines alternative fibers as a replacement for steel fibers in producing Ultra-High-Performance Concrete (UHPC) to reduce CO2 emissions and GWP. The research investigates five alternative fiber types—polypropylene, polyvinyl alcohol, polyethylene terephthalate, alkali-resistant glass, and carbon fibers—integrated into various UHPC mixtures. A life cycle assessment framework was applied to assess the environmental impacts of these UHPC mixtures, focusing on key factors such as GWP, resource use, and other critical environmental damage categories. The results reveal that incorporating polypropylene and polyethylene terephthalate fibers in UHPC mixtures contributes to the greatest reduction in GWP, by more than 28% compared to conventional steel fiber-reinforced UHPC, while maintaining comparable mechanical performance and structural functionality. Polyvinyl alcohol and alkali-resistant glass fibers lead to moderate reductions in environmental impacts, and carbon fibers show limited environmental benefits due to high production energy demands. This investigation highlights the substantial environmental benefits of replacing steel fibers in UHPC with innovative, low-impact fibers. These findings show the potential for more environmentally friendly construction and support the development of more sustainable practices in concrete production, advancing global sustainability goals.