Scholarlink

<p>This study proposes an eco-friendly method for producing porous geopolymers by utilizing untreated coal waste fines (CWF), a waste material segregated during coal beneficiation. To address the low reactivity of CWF without calcination, metakaolin was employed as a supplementary precursor. This approach reduces the need for energy-intensive calcination, reducing energy consumption and greenhouse gas emissions. The resulting geopolymers were characterized by their physical, mechanical, and microstructural properties, revealing comparable performance to traditional calcined CWF-based geopolymers and Portland cement foam concrete. The strength-to-density ratio of the geopolymers was favorable, making them suitable for lightweight construction applications. Environmental safety was evaluated through leaching tests, which showed that the geopolymers successfully immobilized hazardous metals, such as manganese, ensuring safe use in construction and waste management. This work presents a sustainable approach to CWF as a valuable resource, offering a practical solution for reducing environmental impact in the construction industry while contributing to the circular economy.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Eco-Friendlier Production of Porous Geopolymer Based on Untreated Coal Waste Fines

  • 期刊论文

  • 发表日期：

    2025年10月3日

查看全文
  • Carlos H. Borgert,
  • Lisandro Simão,
  • Lucio Rosso Neto,
  • Eduarda F. Olivo,
  • Juliana Acordi,
  • Oscar R. K. Montedo,
  • Dachamir Hotza,
  • Fabiano Raupp-Pereira

摘要

This study proposes an eco-friendly method for producing porous geopolymers by utilizing untreated coal waste fines (CWF), a waste material segregated during coal beneficiation. To address the low reactivity of CWF without calcination, metakaolin was employed as a supplementary precursor. This approach reduces the need for energy-intensive calcination, reducing energy consumption and greenhouse gas emissions. The resulting geopolymers were characterized by their physical, mechanical, and microstructural properties, revealing comparable performance to traditional calcined CWF-based geopolymers and Portland cement foam concrete. The strength-to-density ratio of the geopolymers was favorable, making them suitable for lightweight construction applications. Environmental safety was evaluated through leaching tests, which showed that the geopolymers successfully immobilized hazardous metals, such as manganese, ensuring safe use in construction and waste management. This work presents a sustainable approach to CWF as a valuable resource, offering a practical solution for reducing environmental impact in the construction industry while contributing to the circular economy.