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<p>This study develops lightweight geopolymer bricks by incorporating 5–20 wt% recycled glass wool waste as a partial fly ash replacement, activated with 2&#xa0;M and 4&#xa0;M NaOH solutions. The bricks exhibited densities of 1725–1880&#xa0;kg/m<sup>3</sup>, compressive strengths of 2.9–3.5&#xa0;MPa, thermal conductivities decreasing from 0.26 to 0.14&#xa0;W/m&#xa0;K, and water absorption below 8.5%, indicating dense microstructures. Durability assessments confirmed over 85% strength retention after freeze-thaw cycling and less than 10% loss under acid and sulfate attacks. Compared to conventional systems, the developed bricks deliver a favorable balance of thermal insulation, structural integrity, and sustainability, positioning them as promising materials for green, energy-efficient masonry applications.</p>

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Revolutionary Geo-Polymer Bricks with Glass Wool: Lightweight, Insulating, and Eco-Friendly Construction Materials

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Pavitra Chouhan,
  • Abhay Sharma,
  • Asokan Pappu

摘要

This study develops lightweight geopolymer bricks by incorporating 5–20 wt% recycled glass wool waste as a partial fly ash replacement, activated with 2 M and 4 M NaOH solutions. The bricks exhibited densities of 1725–1880 kg/m3, compressive strengths of 2.9–3.5 MPa, thermal conductivities decreasing from 0.26 to 0.14 W/m K, and water absorption below 8.5%, indicating dense microstructures. Durability assessments confirmed over 85% strength retention after freeze-thaw cycling and less than 10% loss under acid and sulfate attacks. Compared to conventional systems, the developed bricks deliver a favorable balance of thermal insulation, structural integrity, and sustainability, positioning them as promising materials for green, energy-efficient masonry applications.