高粘度青的热衰老降解基于风湿学方法
Siyue Zhu1, Xiantao Qin1, Menghui Liao2
1School of Civil Engineering and Architecture, Wuhan Polytechnic University, 68 Xuefu South Road, Wuhan 430023, China.
Materials (Basel, Switzerland)
|September 28, 2023
概括
自修改高粘度青 (SHVA) 对多孔青路面表现出优越的抗衰老性能. 热老化显著影响了青的形学,但SHVA保持了比传统改性青更好的性能.
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.
- 铺路工程 铺路工程 铺路工程
背景情况:
- 多孔青路面 (PA) 对于中国的海绵城市建设至关重要.
- 高粘度青 (HVA) 具有出色的抗和抗性,但易于在PA中老化.
- 热老化显著降低了PA中的HVA的耐用性.
研究的目的:
- 研究热衰老对自我修饰的HVA (SHVA) 的风湿性质的影响.
- 为了比较SHVA与其他改性青的抗衰老性能.
主要方法:
- 包括SHVA在内的五种青类型使用滚动薄膜炉 (RTFO) 和压力老化容器 (PAV) 进行了老化.
- 通过温度扫描 (TS),重复爬行和恢复 (RCR) 和曲束形仪 (BBR) 测试来评估形学特性.
- 分析的重点是质指数的变化和修饰剂对抗衰老的贡献.
主要成果:
- 由于氧化和修饰剂降解,衰老会改变HVA质;修饰剂的有效性随着年龄的增长而降低.
- 在高温下,SHVA的抗衰老性能比传统的乙烯-丁-乙烯 (SBS) 改性青 (GC) 更好.
- 与其他测试的青相比,SHVA的整体抗衰老性能优越,特别是对RTFO和PAV的衰老.
结论:
- 在测试的青中,SHVA具有最好的抗衰老性能,因此适用于耐用多孔青路面.
- 在SHVA中的修饰剂比TAFPACK-超级HVA (TPS) 中的修饰剂更有效地促进抗衰老.
- 虽然SHVA在老化后的高温性能方面表现出色,但低温性能变化需要进一步考虑,TPS显示较差的结果.
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