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This study investigates the enhancement of cob, a traditional earth-based construction technique, through incorporating straw fibers to improve its thermal and mechanical properties. Two reinforced mixtures, heavy (2% straw) and lightweight (10% straw), were tested alongside a reference mixture (without fibers). The lightweight configuration (LW) reduced thermal conductivity to 0.21 W.m−1.K−1 (47.5% reduction) compared to the reference (0.40 W.m−1.K−1), while the heavy configuration achieved 0.23 W.m−1.K−1 in thermal conductivity (42.5% reduction). Mechanical properties also improved significantly, with compressive strength increasing from 1.14 MPa in the reference to 2.06 MPa in the LW mixture (81% improvement), and to 1.64 MPa in the heavy mixture (44% improvement). These findings highlight the potential of incorporating straw fibers as reinforcement to improve the performance of traditional earth-based construction techniques, confirming better performance while conserving sustainability and cultural heritage.

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Advancing Thermal and Mechanical Properties of Traditional Building Practices Through Enhanced Earth-Based Cob Performance with Straw

  • 会议论文

  • 发表日期：

    2026年

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  • Yamna Soussi,
  • Marouane Wakil,
  • Said Oubaha,
  • Zineb Zoubir,
  • Mohamed Oualid Mghazli,
  • Jens Pfafferott,
  • Fatima Ezzahra El Abbassi,
  • Mouatassim Charai

摘要

This study investigates the enhancement of cob, a traditional earth-based construction technique, through incorporating straw fibers to improve its thermal and mechanical properties. Two reinforced mixtures, heavy (2% straw) and lightweight (10% straw), were tested alongside a reference mixture (without fibers). The lightweight configuration (LW) reduced thermal conductivity to 0.21 W.m−1.K−1 (47.5% reduction) compared to the reference (0.40 W.m−1.K−1), while the heavy configuration achieved 0.23 W.m−1.K−1 in thermal conductivity (42.5% reduction). Mechanical properties also improved significantly, with compressive strength increasing from 1.14 MPa in the reference to 2.06 MPa in the LW mixture (81% improvement), and to 1.64 MPa in the heavy mixture (44% improvement). These findings highlight the potential of incorporating straw fibers as reinforcement to improve the performance of traditional earth-based construction techniques, confirming better performance while conserving sustainability and cultural heritage.