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<p>High-temperature asphalt production volatile organic chemicals (VOCs) emissions. This study developed a composite modifier combining organic montmorillonite (OMMT) with paraffin-based (XT-L) to simultaneously suppress emissions and enhance workability. Rheological analysis demonstrated that the XT-L/OMMT system improved high-temperature performance while reducing viscosity compared to OMMT-modified asphalt. Multiple analytical techniques (X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Gel permeation chromatography (GPC), Pyrolysis gas chromatography-mass spectrometry (PY-GC/MS)) confirmed physical blending dominated the modification process, forming an exfoliated structure that retained light components. The composite modified asphalt showed broader molecular weight distribution with increased low-MW content (34.5% vs. control’s 30.8%), effectively suppressing small-molecule volatilization. VOCs emissions decreased by 48.7% (OMMT) and 36.9% (XT-L/OMMT) versus base asphalt. The synergistic mechanism combines OMMT’s physical entrapment of volatiles with XT-L’s viscosity reduction, achieving dual environmental and practical benefits. Results verify the composite system blocks VOCs release through component stabilization (45.2% light component retention) and emission pathway interruption, providing an eco-friendly solution that maintains workability while reducing environmental impacts.</p>

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Characteristics and Rheological Properties of Smoke Suppression of XT-L/OMMT-Modified Asphalt

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Xiaolong Yang,
  • Zhenghao Zhang,
  • Wanhong Yang,
  • Xiaofan Jia,
  • Guangchen Wang,
  • Bowen Chen

摘要

High-temperature asphalt production volatile organic chemicals (VOCs) emissions. This study developed a composite modifier combining organic montmorillonite (OMMT) with paraffin-based (XT-L) to simultaneously suppress emissions and enhance workability. Rheological analysis demonstrated that the XT-L/OMMT system improved high-temperature performance while reducing viscosity compared to OMMT-modified asphalt. Multiple analytical techniques (X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Gel permeation chromatography (GPC), Pyrolysis gas chromatography-mass spectrometry (PY-GC/MS)) confirmed physical blending dominated the modification process, forming an exfoliated structure that retained light components. The composite modified asphalt showed broader molecular weight distribution with increased low-MW content (34.5% vs. control’s 30.8%), effectively suppressing small-molecule volatilization. VOCs emissions decreased by 48.7% (OMMT) and 36.9% (XT-L/OMMT) versus base asphalt. The synergistic mechanism combines OMMT’s physical entrapment of volatiles with XT-L’s viscosity reduction, achieving dual environmental and practical benefits. Results verify the composite system blocks VOCs release through component stabilization (45.2% light component retention) and emission pathway interruption, providing an eco-friendly solution that maintains workability while reducing environmental impacts.