复杂环境条件对疲劳的影响 快速化的SBS修改青的自我愈合特性
Jinchao Yue1, Jiahao Fu1, Yihan Wang1
1School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
复杂的环境老化,包括压力,紫外线和盐,严重降解了青路面.
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.
- 环境科学 环境科学
背景情况:
- 青路面面临着环境因素带来的重大压力,影响其使用寿命.
- 了解这些影响对于改善路面的耐用性和性能至关重要.
研究的目的:
- 在复杂的环境老化条件下,评估快速化的SBS (SBS-T) 改性青的疲劳自我愈合特性.
- 评估压力,紫外线和盐溶液老化对青粘弹性和疲劳耐久性的影响.
主要方法:
- 复杂的环境模拟试验:压力老化,紫外线老化和盐溶液暴露.
- 动态剪切风力计 (DSR) 测试:频率扫描,线性振幅扫描 (LAS) 和疲劳-愈合-疲劳测试.
- 基于粘弹性连续损伤理论的评估.
主要成果:
- 结合老化显著增加了粘弹性参数,将青从弹性转变为粘性行为.
- 联合压力-紫外线-盐溶液老化导致疲劳耐用性和自我愈合能力的最严重退化.
- 增加的应变加剧了疲劳寿命的恶化,并在复杂的衰老中降低了自我愈合效率.
结论:
- 协同效应的老化效应,特别是与盐溶液,大大损害了青的耐疲劳性和自我愈合效率.
- 虽然青显示出一些自我愈合,但复杂的老化会降低绝对性能和恢复效率.
- 这项研究强调了对强大的青配方的关键需求,这些配方能够抵御多因素的环境退化.
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