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<p>This work describes the interfacial bond characteristics of a novel natural fiber laminate system. The natural fiber laminates are fabricated by combining a bi-directional natural fiber mat (flax or hemp) and discrete natural fiber-reinforced ultra-high toughness cementitious composites (UHTCC). To utilize the proposed bio-fiber laminates for retrofitting applications, it is essential to understand the bond between the existing concrete and proposed UHTCC matrix and the natural fiber mat and UHTCC matrix. Hence, the present work experimentally investigates the bond characteristics through (a) a slant shear test, (b) a pull-out test, and (c) a four-point bending test. Moreover, a detailed techno-economic sustainability analysis was carried out using the cradle-to-gate principle to understand the economic aspect and environment-friendly nature of the proposed laminate system. Experimental results reveal that the hybrid combination of hemp mat and flax UHTCC matrix showed a high bond stress of 8.64 N/mm<sup>2</sup>. Moreover, the micro-structural analysis revealed a strong interfacial bonding between the fiber and UHTCC matrix. From the sustainability analysis, it can be inferred that the cost required for fabricating a bio-composite panel is less expensive, ranges between 0.5–0.65 dollar ($), require less energy of 0.0053 gigajoule (GJ), and has a reduced carbon footprint of 3.324 to 4.568&#xa0;kg-carbon-di-oxide- equivalent/cubic meter (kg-CO<sub>2</sub>-eq/m<sup>3</sup>).</p>

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Influence of micro-structural and techno economic parameters on the interfacial bond strength of novel natural fiber mat UHTCC laminate system

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • U. Brindha,
  • M. Chellapandian,
  • N. S. Raja Murugesh,
  • R. Raiben Armal

摘要

This work describes the interfacial bond characteristics of a novel natural fiber laminate system. The natural fiber laminates are fabricated by combining a bi-directional natural fiber mat (flax or hemp) and discrete natural fiber-reinforced ultra-high toughness cementitious composites (UHTCC). To utilize the proposed bio-fiber laminates for retrofitting applications, it is essential to understand the bond between the existing concrete and proposed UHTCC matrix and the natural fiber mat and UHTCC matrix. Hence, the present work experimentally investigates the bond characteristics through (a) a slant shear test, (b) a pull-out test, and (c) a four-point bending test. Moreover, a detailed techno-economic sustainability analysis was carried out using the cradle-to-gate principle to understand the economic aspect and environment-friendly nature of the proposed laminate system. Experimental results reveal that the hybrid combination of hemp mat and flax UHTCC matrix showed a high bond stress of 8.64 N/mm2. Moreover, the micro-structural analysis revealed a strong interfacial bonding between the fiber and UHTCC matrix. From the sustainability analysis, it can be inferred that the cost required for fabricating a bio-composite panel is less expensive, ranges between 0.5–0.65 dollar ($), require less energy of 0.0053 gigajoule (GJ), and has a reduced carbon footprint of 3.324 to 4.568 kg-carbon-di-oxide- equivalent/cubic meter (kg-CO2-eq/m3).