高模块添加剂对SBS修改青的协同效应:微结构,质增强和剂量依赖的性能优化
Qinghua He1,2, Zhuosen Li1, Jianqi Huang2
1School of Highway, Chang'an University, Xi'an 710061, China.
Materials (Basel, Switzerland)
|October 29, 2025
概括
两种高模块添加剂增强了SBS修改青的性能.
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.
背景情况:
- 修改过乙烯-乙烯-乙烯 (SBS) 的青对于耐用路面至关重要.
- 优化添加剂协同作用是提高青性能的关键.
- 了解微观结构-性能关系对于材料设计至关重要.
研究的目的:
- 研究两种高模块添加剂对SBS改性青的协同作用.
- 描述微观结构的变化,并评估性能增强.
- 确定最佳的添加剂剂量及其对各种性能指标的影响.
主要方法:
- 光显微镜用于微观结构分析.
- 风病学试验,以评估高温性能 (复杂模量,结因子).
- 多重应力爬行恢复 (MSCR) 测试用于弹性恢复和爬行合规性.
- 透测试用于评估低温性能.
主要成果:
- 添加剂通过相位分离形成一个相互连接的网络,随着时间的推移而膨胀.
- 最佳剂量 (10%重量) 显著提高复合模量 (~215%) 和转化因子 (~300%).
- 观察到增强弹性回收和减少不可回收的爬行合规性.
- 低温柔性受到负面影响,HMA-B显示出比HMA-A更大的透率下降和更低的性.
- 10%的剂量是平衡耐磨性和低温性能的关键值.
结论:
- 与高模块添加剂的协同修改有效地提高了SBS修改青的高温性能.
- 10%的临界剂量最大限度地提高了耐磨性,同时控制了低温降解.
- 建议HMA-B用于高压力条件,而HMA-A适用于可变温度环境.
- 为优化青改造提出了一个集成的"微观结构-性能-剂量"设计范式.
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