Scholarlink

<p>Beached <i>Posidonia oceanica</i> seagrass fibres are an abundant yet underutilised Mediterranean biowaste with potential for sustainable reinforcement of cement-treated sediments. We present a first multiscale bio–chemo–hygro–mechanical characterisation, combining high-resolution synchrotron X-ray tomography with a 250&#xa0;nm voxel size, FE-SEM/EDX, tensile testing, water-retention measurements. An image-based method links Aegagropile diameter to fibre length, enabling targeted selection of fibres in the 10–25&#xa0;mm range to minimise clustering and favour reinforcing-network formation within the potentially-treated material. Air-dried fibres exhibit higher tensile strength, whereas pre-soaked fibres show greater porosity, tortuosity, ductility and toughness, and water-retention capacity, highlighting a moisture-dependent trade-off between strength and deformability. Water-retention curves reveal two storage domains: intra-fibre absorption within the lumen’s porosity and capillarity in the inter-fibre pore space of bundled fibres. Within a cement-treated sediment mixture, 1% fibre addition does not significantly increase the unconfined compression strength, which is mainly governed by curing and cementation, but improves post-peak response, residual resistance, distributed cracking, ductility, and damage tolerance while maintaining comparable internal compactness. Ultrasonic pulse velocity results support that fibre inclusion does not compromise the internal compactness of the cement-treated sediment, while curing promotes progressive matrix densification. This dual mechanical and moisture-storage functionality positions <i>Posidonia oceanica</i> fibres as a circular bio-based reinforcement for cement-treated sediments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The fascinating complexity of seagrass bio-fibres: insights from bio-chemo-hygro mechanical analysis for their reuse as soil reinforcement

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月1日

查看全文
  • Jafar Karimiazar,
  • Enrique Romero,
  • Rossella Petti,
  • Joel Torres-Serra,
  • Alessandro Fraccica,
  • Gioacchino Viggiani,
  • Gustavo Pinzón,
  • Claudia Vitone

摘要

Beached Posidonia oceanica seagrass fibres are an abundant yet underutilised Mediterranean biowaste with potential for sustainable reinforcement of cement-treated sediments. We present a first multiscale bio–chemo–hygro–mechanical characterisation, combining high-resolution synchrotron X-ray tomography with a 250 nm voxel size, FE-SEM/EDX, tensile testing, water-retention measurements. An image-based method links Aegagropile diameter to fibre length, enabling targeted selection of fibres in the 10–25 mm range to minimise clustering and favour reinforcing-network formation within the potentially-treated material. Air-dried fibres exhibit higher tensile strength, whereas pre-soaked fibres show greater porosity, tortuosity, ductility and toughness, and water-retention capacity, highlighting a moisture-dependent trade-off between strength and deformability. Water-retention curves reveal two storage domains: intra-fibre absorption within the lumen’s porosity and capillarity in the inter-fibre pore space of bundled fibres. Within a cement-treated sediment mixture, 1% fibre addition does not significantly increase the unconfined compression strength, which is mainly governed by curing and cementation, but improves post-peak response, residual resistance, distributed cracking, ductility, and damage tolerance while maintaining comparable internal compactness. Ultrasonic pulse velocity results support that fibre inclusion does not compromise the internal compactness of the cement-treated sediment, while curing promotes progressive matrix densification. This dual mechanical and moisture-storage functionality positions Posidonia oceanica fibres as a circular bio-based reinforcement for cement-treated sediments.