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<p>This study investigates the potential of using industrial waste, specifically lathe steel scrap fibres, as a sustainable additive in geopolymer concrete (GPC) to enhance its durability and mechanical properties. The growing demand for eco-friendly construction materials has driven research into alternative binders such as GPC, which utilizes industrial by-products and reduces reliance on traditional Portland cement. In this work, GPC was synthesized using two different molar concentrations (10&#xa0;M and 12&#xa0;M) of sodium hydroxide (NaOH), with varying proportions (0%, 0.5%, 1.0%, 1.5%, and 2.0%) of lathe steel scrap fibres incorporated. The physical and chemical properties of the lathe steel scrap were characterized through microscopic and compositional analyses to understand their interaction with the geopolymer matrix. Durability performance was evaluated through standard tests, including apparent chloride diffusion, sorptivity, and acid resistance at 28, 56, and 90&#xa0;days. Additionally, flexural deformation modelling was conducted to assess mechanical behaviour. Results indicate that LSGC containing 1.5% lathe steel scrap exhibited superior durability and mechanical performance in both 10&#xa0;M and 12&#xa0;M NaOH mixtures compared to the control and other dosages. This study demonstrates the effective reuse of industrial steel waste in geopolymer systems, offering a viable pathway for sustainable and durable construction materials.</p>

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Investigation of durability characteristics in fiber reinforced geopolymer composite using lathe steel scrap and flexural deformation

  • 期刊论文

  • 发表日期：

    2025年7月9日

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  • Dakka Gurappa,
  • Dushyanth V. Babu R,
  • Shaik Numan Mahdi,
  • M. Shivakumar

摘要

This study investigates the potential of using industrial waste, specifically lathe steel scrap fibres, as a sustainable additive in geopolymer concrete (GPC) to enhance its durability and mechanical properties. The growing demand for eco-friendly construction materials has driven research into alternative binders such as GPC, which utilizes industrial by-products and reduces reliance on traditional Portland cement. In this work, GPC was synthesized using two different molar concentrations (10 M and 12 M) of sodium hydroxide (NaOH), with varying proportions (0%, 0.5%, 1.0%, 1.5%, and 2.0%) of lathe steel scrap fibres incorporated. The physical and chemical properties of the lathe steel scrap were characterized through microscopic and compositional analyses to understand their interaction with the geopolymer matrix. Durability performance was evaluated through standard tests, including apparent chloride diffusion, sorptivity, and acid resistance at 28, 56, and 90 days. Additionally, flexural deformation modelling was conducted to assess mechanical behaviour. Results indicate that LSGC containing 1.5% lathe steel scrap exhibited superior durability and mechanical performance in both 10 M and 12 M NaOH mixtures compared to the control and other dosages. This study demonstrates the effective reuse of industrial steel waste in geopolymer systems, offering a viable pathway for sustainable and durable construction materials.