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<p>This investigation focuses on the optimization of eco-friendly polymeric rebar materials for sustainable construction applications. The rebars were fabricated using discarded domestic wastes processed into biochar and flax fiber-reinforcements and cast via a mould casting method following an L9 Taguchi experimental design. Tensile strength and water absorption were measured for each experimental condition, with observed tensile strengths ranging from 40.63 to 61.84&#xa0;MPa and water absorption from 1.3% to 1.9%. Grey relational analysis (GRA) was employed to determine the optimal combination of process parameters. A confirmation test was then performed using this identified optimal combination, yielding a tensile strength of 61.83&#xa0;MPa and water absorption of 0.16%. These values fall within the experimental ranges of the L9 trials (L8)&#xa0;and validate the predicted performance improvements. Structural evaluation of concrete beams reinforced with the optimized rebars showed a maximum cracking load of 76.74 kilonewton (kN) and a yield load of 69.34 kN, indicating enhanced resistance to cracking and permanent deformation. These findings suggest that sustainable, waste-derived polymeric rebars can serve as effective alternatives in modern engineering applications where reduced dead load and improved durability are desired.</p>

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Optimization of biochar-flax fiber reinforced polymer composite rebars using Taguchi-Grey analysis

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • M. Joni,
  • T. Kavitha,
  • A. Arun Kumar

摘要

This investigation focuses on the optimization of eco-friendly polymeric rebar materials for sustainable construction applications. The rebars were fabricated using discarded domestic wastes processed into biochar and flax fiber-reinforcements and cast via a mould casting method following an L9 Taguchi experimental design. Tensile strength and water absorption were measured for each experimental condition, with observed tensile strengths ranging from 40.63 to 61.84 MPa and water absorption from 1.3% to 1.9%. Grey relational analysis (GRA) was employed to determine the optimal combination of process parameters. A confirmation test was then performed using this identified optimal combination, yielding a tensile strength of 61.83 MPa and water absorption of 0.16%. These values fall within the experimental ranges of the L9 trials (L8) and validate the predicted performance improvements. Structural evaluation of concrete beams reinforced with the optimized rebars showed a maximum cracking load of 76.74 kilonewton (kN) and a yield load of 69.34 kN, indicating enhanced resistance to cracking and permanent deformation. These findings suggest that sustainable, waste-derived polymeric rebars can serve as effective alternatives in modern engineering applications where reduced dead load and improved durability are desired.