Scholarlink

<p>Aging of binder is an irreversible process that significantly reduces the longevity of flexible pavements. Recent research has focused on modified binders using recycled plastics to enhance pavement performance and reduce costs and environmental impact. However, there exists limited research on how different forms of polypropylene affect the long-term rheological performance of binders. This study examines the impact of crystalline polypropylene on the rheological performance of binder under unaged and aged conditions. The binder was blended with varying polypropylene dosages and tested for conventional, morphological and rheological properties. Adding polypropylene increased viscosity and softening point but reduced penetration and ductility, indicating enhanced stiffness and brittleness, which reduces plastic deformation. Rutting resistance improved up to 0.4% dosage, beyond which phase separation and poor dispersion occurred. At 82&#xa0;°C, 0.4% polypropylene enhanced rutting resistance by 95.96%, significantly improving resistance to permanent deformation at high temperatures. Reclaimed asphalt pavement (RAP) from a 5-year-old pavement is subjected to rheological and chemical investigations. Aging at 163˚C for 5&#xa0;h in a normal oven simulates RTFO aging, followed by aging at 85˚C for 3 days to simulate 5 years of field aging for unmodified binder. The rutting resistance of VG30 binder with 0.4% polypropylene aged at 163˚C for 11&#xa0;h matched that of RTFO aged VG30 binder, indicating reduced short-term aging effects. Polypropylene increased the aromaticity index and decreased the carbonyl index compared to unmodified binder, reducing aging effects. Thus, polypropylene serves as a potential modifier for enhancing long-term binder durability and contributes to sustainability.</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

Polypropylene as a binder material for asphalt pavements: a study of long-term durability through aging simulations

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月13日

查看全文
  • Tejeshwini S.,
  • Mamatha K. H.,
  • Divyashree S. R.,
  • Dinesh S. V.

摘要

Aging of binder is an irreversible process that significantly reduces the longevity of flexible pavements. Recent research has focused on modified binders using recycled plastics to enhance pavement performance and reduce costs and environmental impact. However, there exists limited research on how different forms of polypropylene affect the long-term rheological performance of binders. This study examines the impact of crystalline polypropylene on the rheological performance of binder under unaged and aged conditions. The binder was blended with varying polypropylene dosages and tested for conventional, morphological and rheological properties. Adding polypropylene increased viscosity and softening point but reduced penetration and ductility, indicating enhanced stiffness and brittleness, which reduces plastic deformation. Rutting resistance improved up to 0.4% dosage, beyond which phase separation and poor dispersion occurred. At 82 °C, 0.4% polypropylene enhanced rutting resistance by 95.96%, significantly improving resistance to permanent deformation at high temperatures. Reclaimed asphalt pavement (RAP) from a 5-year-old pavement is subjected to rheological and chemical investigations. Aging at 163˚C for 5 h in a normal oven simulates RTFO aging, followed by aging at 85˚C for 3 days to simulate 5 years of field aging for unmodified binder. The rutting resistance of VG30 binder with 0.4% polypropylene aged at 163˚C for 11 h matched that of RTFO aged VG30 binder, indicating reduced short-term aging effects. Polypropylene increased the aromaticity index and decreased the carbonyl index compared to unmodified binder, reducing aging effects. Thus, polypropylene serves as a potential modifier for enhancing long-term binder durability and contributes to sustainability.