Scholarlink

<p>Railway track ballast deterioration is frequently driven by substructure cracking, excessive vibration, and uneven settlement, which collectively compromise track geometry and operational safety. In geologically sensitive regions such as Southeast Malaysia, soil subgrades are particularly susceptible to these train-induced stresses. This study investigates the development of a sustainable injection grouting material, namely a polyurethane composite doped with fine recycled rubber powder (PUCR), to simultaneously enhance the mechanical, acoustic, and vibration-damping properties through an experimental approach. The composite formulations were rigorously evaluated using compressive strength testing, sound absorption coefficient and transmission loss, hammer-based vibration analysis, and one-dimensional oedometer consolidation tests. Experimental results identified the PUCR formulation containing 7.5% recycled rubber as optimal, providing a superior balance between structural integrity and energy dissipation. A sound absorption coefficient of PUCR demonstrates exceptional efficiency in mitigating high-frequency rolling noise in soil subgrade. Simulated PUCR injection in soil subgrades also reduced settlement, lowered natural frequencies, and improved consolidation behaviour, enhancing resistance to static loading. These findings demonstrate that PUCR is a high-performance and sustainable solution for railway infrastructure, offering dual benefits of substructure stabilization and noise reduction while advancing circular economy initiatives through the reuse of rubber waste.</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

Evaluation of Acoustic, Vibration, and Settlement Performance of Rigid Polyurethane–Recycled Rubber as Grouting Material for Subgrade Railway Ballast Substructure

  • 期刊论文

  • 发表日期：

    2026年5月16日

查看全文
  • Tasnim Zakepeli,
  • Nik Normunira Mat Hassan,
  • Tuan Noor Hasanah Tuan Ismail,
  • Noraini Marsi,
  • Andri Kusbiantoro,
  • Anika Zafiah Mohd Rus,
  • Mohd Ridzuan Mohd Jamir,
  • Najibah Ab Latif,
  • Irwanda Laory

摘要

Railway track ballast deterioration is frequently driven by substructure cracking, excessive vibration, and uneven settlement, which collectively compromise track geometry and operational safety. In geologically sensitive regions such as Southeast Malaysia, soil subgrades are particularly susceptible to these train-induced stresses. This study investigates the development of a sustainable injection grouting material, namely a polyurethane composite doped with fine recycled rubber powder (PUCR), to simultaneously enhance the mechanical, acoustic, and vibration-damping properties through an experimental approach. The composite formulations were rigorously evaluated using compressive strength testing, sound absorption coefficient and transmission loss, hammer-based vibration analysis, and one-dimensional oedometer consolidation tests. Experimental results identified the PUCR formulation containing 7.5% recycled rubber as optimal, providing a superior balance between structural integrity and energy dissipation. A sound absorption coefficient of PUCR demonstrates exceptional efficiency in mitigating high-frequency rolling noise in soil subgrade. Simulated PUCR injection in soil subgrades also reduced settlement, lowered natural frequencies, and improved consolidation behaviour, enhancing resistance to static loading. These findings demonstrate that PUCR is a high-performance and sustainable solution for railway infrastructure, offering dual benefits of substructure stabilization and noise reduction while advancing circular economy initiatives through the reuse of rubber waste.