提高路面的耐用性:在老化条件下对传统和再生回收粘合剂进行比较的风学评估
Asmasadat Dabiri1, Hugo M R D Silva1, Joel R M Oliveira1
1Institute for Sustainability and Innovation in Structural Engineering (ISISE), Department of Civil Engineering, Advanced Production & Intelligent Systems Associated Laboratory (ARISE), University of Minho, 4800-058 Guimaraes, Portugal.
Materials (Basel, Switzerland)
|July 13, 2024
概括
这项研究使用再生剂优化了回收的青粘合剂,发现0.4%的混合物与控制青的特性密切匹配. 这提高了回收混合物的性能和道路建设中的可持续性.
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.
- 可持续路面技术 可持续路面技术
背景情况:
- 回收青混合物表现出增加的刚性和脆性,因粘合剂老化而加剧.
- 青春剂可以提高灵活性,但可能会导致性能变化和磨损.
- 优化粘合剂混合物对于提高再生青路面的性能至关重要.
研究的目的:
- 开发一种最佳的复制,再生剂和纯的混合物.
- 为了达到与35/50钢笔级青相提并论的质性质,用于道路铺路应用.
- 评估再生剂对循环青粘合剂的抗衰老和结潜力的影响.
主要方法:
- 使用30:70混合再生青和50/70笔级青制成的复原粘合剂.
- 纳入0.2%至0.6%的再生剂,按重量回收青的重量.
- 在各种老化条件下进行透,软化点,粘度和动态剪切体温测试.
主要成果:
- 与0.4%的复原剂混合的粘合剂混合物表现出类似于35/50钢笔级青的质性质.
- 这种混合物实现了回收混合物中20%至55%的刚度降低,其中30%是回收青.
- 复原结合剂显示出与控制青相比的抗衰老能力 (衰老比率的差异不到5%),但0.4%的复原结合剂使结潜力翻了一番.
结论:
- 0.4%的再生剂的最佳混合物增强了回收青粘合剂的性能,降低了刚性并保持了耐老化的性能.
- 需要仔细控制复原剂含量,以减轻循环青路面的化问题.
- 这项研究通过提高再生青材料的可行性来支持可持续路面施工.
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