对高粘度改性青的短期老化方案的调查
Chengwei Xing1,2, Juze Qin3, Zhiqiang Cheng4,5
1Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, South 2nd Ring Road Middle Section, Xi'an 710064, China.
Materials (Basel, Switzerland)
|June 10, 2023
概括
为高粘度改性 (HVMB) 开发新的短期老化方法至关重要. 这项研究建议使用薄膜烤箱测试 (TFOT) 在178°C下5小时老化HVMB.
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.
- 青技术技术的使用
背景情况:
- 对于高粘度改性 (HVMB),由于其独特的特性,标准的短期老化方法是不适合的.
- 有效的老化模拟对于预测HVMB在青混合物中的性能至关重要.
研究的目的:
- 为高粘度改性 (HVMB) 建立一个合适的实验室短期老化方案.
- 为了优化HVMB的老化周期和温度,以准确模拟现场条件.
主要方法:
- 在不同的条件下使用滚动薄膜炉试验 (RTFOT) 和薄膜炉试验 (TFOT) 进行两种商业HVMB类型的老化.
- 含有HVMB的开放等级摩擦过程 (OGFC) 混合物的老化,以模仿植物混合.
- 使用温度扫描,频率扫描和多重应力爬行恢复测试对老化 (老化和提取) 青的风湿学性质评估.
主要成果:
- 薄膜炉试验 (TFOT) 证明对HVMB比RTFOT更适合.
- 在175°C的强制推进炉中2小时老化OGFC混合物有效模拟混合厂的短期老化.
- 对HVMB的最佳TFOT参数被确定为在178°C下5小时.
结论:
- 对于HVMB的短期老化,建议使用精细的TFOT协议 (在178°C下5小时).
- 拟议的方法提供了一个更准确的模拟在混合工厂过程中青老化.
- 这项研究有助于改善HVMB在路面工程中的材料表征和性能预测.
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