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<p>The global pavement construction sector faces significant challenges due to the overdependence on conventional bitumen in flexible pavements, which exhibit susceptibility to high-temperature deformation and premature structural failure, compromising long-term durability. In response to the urgent need for sustainable alternatives, this study investigates the efficacy of Sodium Lignosulphonate (SLS), a bio-based polymer, as a bitumen modifier to enhance the performance and environmental sustainability of asphalt mixtures. This study investigates four key parameters influencing flexible pavement performance these are Marshall properties, moisture susceptibility assessed by Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR)), and rutting behaviour. Moisture-induced damage was quantified using a Moisture Induced Sensitivity Tester (MIST), with Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR) results indicating superior moisture resistance (TSR &gt; 80%) compared to unmodified mixes. Additionally, rutting behaviour was assessed using Wheel Rut Testing, revealing a significant reduction in rut depth under simulated traffic loads, highlighting improved high-temperature stability. The SLS modified bitumen demonstrated enhanced mechanical resistance and deformation characteristics compared to conventional VG-30. This study underscores the potential of SLS as a sustainable, high-performance bitumen modifier, offering a viable pathway to mitigate premature pavement degradation while reducing reliance on conventional petroleum-based binders.</p>

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Performance Assessment of Bituminous Mixtures Modified with Sodium Lignosulfonate

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Alok Kumar,
  • Makendran Chandrakasu

摘要

The global pavement construction sector faces significant challenges due to the overdependence on conventional bitumen in flexible pavements, which exhibit susceptibility to high-temperature deformation and premature structural failure, compromising long-term durability. In response to the urgent need for sustainable alternatives, this study investigates the efficacy of Sodium Lignosulphonate (SLS), a bio-based polymer, as a bitumen modifier to enhance the performance and environmental sustainability of asphalt mixtures. This study investigates four key parameters influencing flexible pavement performance these are Marshall properties, moisture susceptibility assessed by Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR)), and rutting behaviour. Moisture-induced damage was quantified using a Moisture Induced Sensitivity Tester (MIST), with Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR) results indicating superior moisture resistance (TSR > 80%) compared to unmodified mixes. Additionally, rutting behaviour was assessed using Wheel Rut Testing, revealing a significant reduction in rut depth under simulated traffic loads, highlighting improved high-temperature stability. The SLS modified bitumen demonstrated enhanced mechanical resistance and deformation characteristics compared to conventional VG-30. This study underscores the potential of SLS as a sustainable, high-performance bitumen modifier, offering a viable pathway to mitigate premature pavement degradation while reducing reliance on conventional petroleum-based binders.