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<p>The sustainable application of recycled waste plastic-modified asphalt (RPMA) is hindered by limited understanding of associated airborne emissions and microplastic (MP) generation. This study evaluates emission characteristics of particulate matter (PM), six types of pollutant fumes, and MP generation from RPMA containing polyethylene terephthalate (PET), high-density polyethylene (HDPE), polypropylene (PP), and low-density polyethylene (LDPE), sourced from three locations in India and incorporated via dry and wet methods. PM emissions varied by 1.56–10.1% (dry) and 0.11–18.06% (wet) compared to control mixes, with no significant influence from plastic type, dosage, or method. Pollutant fume levels were comparable to controls, though air quality index values consistently exceeded 200, indicating unhealthy conditions. MP generation was minimal due to improved adhesion in the composite asphalt matrix. While RPMA shows minimal additional emission impacts, improved air quality controls are advised for worker safety.</p>

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Emission characteristics and microplastic generation in recycled waste plastic modified asphalt mixtures

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • Soumyadeep Deb,
  • Praveen Kumar,
  • Nikhil Saboo

摘要

The sustainable application of recycled waste plastic-modified asphalt (RPMA) is hindered by limited understanding of associated airborne emissions and microplastic (MP) generation. This study evaluates emission characteristics of particulate matter (PM), six types of pollutant fumes, and MP generation from RPMA containing polyethylene terephthalate (PET), high-density polyethylene (HDPE), polypropylene (PP), and low-density polyethylene (LDPE), sourced from three locations in India and incorporated via dry and wet methods. PM emissions varied by 1.56–10.1% (dry) and 0.11–18.06% (wet) compared to control mixes, with no significant influence from plastic type, dosage, or method. Pollutant fume levels were comparable to controls, though air quality index values consistently exceeded 200, indicating unhealthy conditions. MP generation was minimal due to improved adhesion in the composite asphalt matrix. While RPMA shows minimal additional emission impacts, improved air quality controls are advised for worker safety.