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<p>The study explores Alkali activation of Municipal Incinerated (MI) as a sustainable approach for producing high-performance geopolymer bricks.A novel, optimized composition comprising MI ash, fly ash, ecosand, M sand, sodium silicate, and sodium hydroxide was formulated and subjected to rigorous evaluation, encompassing morphological and mineralogical characterization, physical property assessment, and durability testing, including initial rate of absorption (IRA), sorptivity, and chemical resistance. The findings reveal that geopolymer bricks fabricated with 40% MI ash exhibit exceptional mechanical strength, achieving a maximum compressive strength of 12.35&#xa0;MPa with 8&#xa0;M NaOH, Na<sub>2</sub>SiO<sub>3</sub>/NaOH ratio of 2, and 0.3 alkaline solution-to-binder ratio. The findings surpassed the standard requirements outlined IS 3495 and demonstrated enhanced sustainability, exhibiting potential for high-performance, eco-friendly construction materials that reduce carbon footprint in the industry.The MI Ash brick (MIA B9) exhibited enhanced durability and chemical resistance, with 40.7–42.8% reduced weight gain in sodium sulphate, sodium chloride, and seawater solutions, and 23.3–42.8% lower IRA values compared to traditional clay and fly ash bricks.</p>

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Sustainable Geopolymer Brick Composites from Municipal Incinerated Ash: Microstructural, Mechanical, and Durability Optimization

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • S. Revathi,
  • K. Vidhya

摘要

The study explores Alkali activation of Municipal Incinerated (MI) as a sustainable approach for producing high-performance geopolymer bricks.A novel, optimized composition comprising MI ash, fly ash, ecosand, M sand, sodium silicate, and sodium hydroxide was formulated and subjected to rigorous evaluation, encompassing morphological and mineralogical characterization, physical property assessment, and durability testing, including initial rate of absorption (IRA), sorptivity, and chemical resistance. The findings reveal that geopolymer bricks fabricated with 40% MI ash exhibit exceptional mechanical strength, achieving a maximum compressive strength of 12.35 MPa with 8 M NaOH, Na2SiO3/NaOH ratio of 2, and 0.3 alkaline solution-to-binder ratio. The findings surpassed the standard requirements outlined IS 3495 and demonstrated enhanced sustainability, exhibiting potential for high-performance, eco-friendly construction materials that reduce carbon footprint in the industry.The MI Ash brick (MIA B9) exhibited enhanced durability and chemical resistance, with 40.7–42.8% reduced weight gain in sodium sulphate, sodium chloride, and seawater solutions, and 23.3–42.8% lower IRA values compared to traditional clay and fly ash bricks.