青粘合剂和混合物的特性,用于增强的铁路应用
Ilho Na1, Hyemin Park1, Jihyeon Yun2
1Barun Construction Technology, Youngin 16953, Republic of Korea.
Materials (Basel, Switzerland)
|July 30, 2025
概括
青适用于铁路轨道,经过修改后的混合物显示出更好的抗拉强度和抗. 性能提升的青在不同温度和融条件下表现出耐用性,满足铁路规格.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 地质技术工程 地质技术工程
背景情况:
- 青的粘弹性特性为铁路轨道应用提供了潜力.
- 青的柔性和脆性的温度敏感性需要仔细考虑.
- 由于改性混合物和添加剂,对铁路基础设施的青越来越感兴趣.
研究的目的:
- 评估青粘合剂,混合物和铁路基础设施的测试方法的综合性质.
- 提高铁路应用的青混凝土层的性能.
- 评估与不同铁路装载机制相关的物理和工程特性.
主要方法:
- 青粘合剂和混合物的性能分级 (PG).
- 间接的抗拉强度 (ITS) 测试. 间接的抗拉强度 (ITS) 测试.
- 拉力强度比 (TSR) 用于评估耐久性.
- 轮子跟踪测试用于测量路阻力.
- 13毫米和19毫米的聚合物混合物的比较.
主要成果:
- 较高的PG等级 (例如PG76-22) 与较低的等级 (例如PG64-22) 相比,产生更高的间接抗拉强度 (ITS).
- 使用粉碎改性剂 (CRM) 和 styrenic热塑性弹性体 (STE) 的混合物实现了超过92%的抗拉强度比率 (TSR),表明耐久性提高.
- 与PG64-22.2相比,修改后的青混合物显示出超过两倍的结阻力.
- 13毫米聚合物混合物在减少永久变形方面通常优于19毫米混合物.
结论:
- 青,特别是改性混合物,是铁路基础设施的合适材料.
- 更高的性能等级和特定的修饰剂显著提高了青在铁路应用中的机械性能.
- 青混凝土层可以满足铁路使用的标准规格,提供更好的性能和耐用性.
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