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<p>Coal mining generates vast quantities of waste, presenting serious environmental challenges such as acid mine drainage and heavy metal contamination. This study explores the reuse of coal waste as a sustainable filler in asphalt mixtures, offering an alternative for waste valorization in the construction industry and contributing to circular economy goals. Although prior research has demonstrated the mechanical potential of coal waste in asphalt, there is a lack of studies comparing its performance to commonly used fillers such as stone powder, which is widely employed in several regions. Moreover, the environmental safety of coal waste in this application remains largely unexplored, particularly regarding its potential toxicological effects on living organisms. To address these gaps, this work integrates mechanical characterization with toxicity assessments using plant-based bioindicators to provide a comprehensive evaluation. The findings support the technical feasibility and environmental safety of coal waste as an asphalt filler, contributing valuable insights to the development of more sustainable and environmentally responsible construction materials.</p>

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From Waste to Roads: Mechanical Properties and Toxicity Evaluation of Asphalt Mixtures with Coal Waste as Filler

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Carlos H. Borgert,
  • Eduarda F. Olivo,
  • Lucio Rosso Neto,
  • Gabriela C. Touguinha,
  • Douglas N. J. Bilhalva,
  • Sabrina Arcaro,
  • Jairo J. Zocche,
  • Fabiano Raupp-Pereira

摘要

Coal mining generates vast quantities of waste, presenting serious environmental challenges such as acid mine drainage and heavy metal contamination. This study explores the reuse of coal waste as a sustainable filler in asphalt mixtures, offering an alternative for waste valorization in the construction industry and contributing to circular economy goals. Although prior research has demonstrated the mechanical potential of coal waste in asphalt, there is a lack of studies comparing its performance to commonly used fillers such as stone powder, which is widely employed in several regions. Moreover, the environmental safety of coal waste in this application remains largely unexplored, particularly regarding its potential toxicological effects on living organisms. To address these gaps, this work integrates mechanical characterization with toxicity assessments using plant-based bioindicators to provide a comprehensive evaluation. The findings support the technical feasibility and environmental safety of coal waste as an asphalt filler, contributing valuable insights to the development of more sustainable and environmentally responsible construction materials.