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This study explores the development of eco-efficient cementitious compo-sites using Magnesium Oxy-Sulfate (MOS) cement matrices reinforced with core-shell textile structures and lignocellulosic fibers. By integrating bio-based reinforcements with multiscale architectures and employing accelerated carbonation curing, the research enhances sustainability by reducing clinker usage and CO₂ emissions while improving mechanical performance and durability. PET/sisal and flax-based core-shell textiles were designed to optimize tensile strength and ductility. Bio-based epoxy resin treatments im-proved fiber-matrix adhesion, enhancing energy absorption during pullout tests. The reinforced MOS composites exhibited flexural strengths exceeding 7 MPa, meeting Brazilian standards for Type A panels for exterior applications. Accelerated carbonation curing promoted Hydrated Magnesium Carbonates (HMCs), improving density and reducing porosity; however, pro-longed curing reduced mechanical strength due to the consumption of critical MOS cement phases. Durability tests, including 50 wet-dry cycles, confirmed material stability under simulated weathering. These findings demonstrate the potential of MOS composites as sustainable alternatives to clinker-based materials, emphasizing the need to optimize carbonation curing parameters for balancing eco-efficiency and mechanical integrity.

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Eco-Efficient Development of Multiscale Fiber-Cement Composites Reinforced with Core-Shell Textiles

  • 会议论文

  • 发表日期：

    2025年

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  • Adriano Azevedo,
  • Lais Kohan,
  • Tais Freitas,
  • Julia Baruque-Ramos,
  • Cise Unluer,
  • Holmer Savastano

摘要

This study explores the development of eco-efficient cementitious compo-sites using Magnesium Oxy-Sulfate (MOS) cement matrices reinforced with core-shell textile structures and lignocellulosic fibers. By integrating bio-based reinforcements with multiscale architectures and employing accelerated carbonation curing, the research enhances sustainability by reducing clinker usage and CO₂ emissions while improving mechanical performance and durability. PET/sisal and flax-based core-shell textiles were designed to optimize tensile strength and ductility. Bio-based epoxy resin treatments im-proved fiber-matrix adhesion, enhancing energy absorption during pullout tests. The reinforced MOS composites exhibited flexural strengths exceeding 7 MPa, meeting Brazilian standards for Type A panels for exterior applications. Accelerated carbonation curing promoted Hydrated Magnesium Carbonates (HMCs), improving density and reducing porosity; however, pro-longed curing reduced mechanical strength due to the consumption of critical MOS cement phases. Durability tests, including 50 wet-dry cycles, confirmed material stability under simulated weathering. These findings demonstrate the potential of MOS composites as sustainable alternatives to clinker-based materials, emphasizing the need to optimize carbonation curing parameters for balancing eco-efficiency and mechanical integrity.