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<p>Concrete Canvas (CC) is a cementitious composite that creates a thin, stiffened jacket around concrete elements, resulting in early structural stiffness and efficient surface confinement. This study provides a thorough experimental analysis of the axial compression behavior of small concrete cylindrical specimens confined with CC and glass-fiber-reinforced polymer (GFRP). Nine sets of specimens were created by systematically altering the number of CC layers, GFRP layers, CC wrapping orientations, and gypsum contents to determine their impact on structural performance. The results showed that the jointly confined (JC) specimens, which used both CC and GFRP, had significantly higher peak load capacity, axial deformation, and toughness than the unconfined (UC) specimens. The confinement of CC significantly reduced non-uniform deformation, improved lateral restraint, and increased overall ductility. The maximum load carrying capacity of the JC specimens increased by 44.35%, whereas the maximum deformation increased by 228%. Furthermore, specimens with CC wrapped in the warp direction exhibited a 36.30% increase in vertical deformation and a 52.94% increase in peak stress compared to the UC samples. These findings demonstrate the synergistic confinement effect of CC and GFRP, establishing CC as a suitable material for reinforcing and rehabilitating concrete structural elements.</p>

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Axial behavior of circular concrete composites confined with concrete canvas and GFRP

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • V. M. SharanKarthick,
  • S. Divya,
  • N. Shanmugasundaram,
  • S. Praveen Kumar

摘要

Concrete Canvas (CC) is a cementitious composite that creates a thin, stiffened jacket around concrete elements, resulting in early structural stiffness and efficient surface confinement. This study provides a thorough experimental analysis of the axial compression behavior of small concrete cylindrical specimens confined with CC and glass-fiber-reinforced polymer (GFRP). Nine sets of specimens were created by systematically altering the number of CC layers, GFRP layers, CC wrapping orientations, and gypsum contents to determine their impact on structural performance. The results showed that the jointly confined (JC) specimens, which used both CC and GFRP, had significantly higher peak load capacity, axial deformation, and toughness than the unconfined (UC) specimens. The confinement of CC significantly reduced non-uniform deformation, improved lateral restraint, and increased overall ductility. The maximum load carrying capacity of the JC specimens increased by 44.35%, whereas the maximum deformation increased by 228%. Furthermore, specimens with CC wrapped in the warp direction exhibited a 36.30% increase in vertical deformation and a 52.94% increase in peak stress compared to the UC samples. These findings demonstrate the synergistic confinement effect of CC and GFRP, establishing CC as a suitable material for reinforcing and rehabilitating concrete structural elements.