经热混合添加剂和回收剂修改的回收青粘合剂的风湿和老化性能
Seyed Ataollah Saed1, Hassan Ziari1, Neda Kamboozia2
1School of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran.
Scientific reports
|December 29, 2025
概括
这项研究表明,将回收剂 (RA) 和热混合添加剂 (WMA) 与高回收青粘合剂 (RAB) 含量相结合,可以提高路面的耐用性. 协同效应增强了疲劳寿命和低温耐受性,创造了可持续的,高质量的青路面.
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.
- 可持续路面技术 可持续路面技术
背景情况:
- 青回收对于可持续建筑至关重要,但面临着粘合剂老化,刚性和耐久性降低的挑战.
- 回收剂 (RAs) 增强了可塑性,但可以降低抗腐蚀性;热混合添加剂 (WMAs) 提高了可加工性和耐老化性,但降低了低温灵活性.
- 在老化过程中,高回收青粘合剂 (RAB) 含量与RA和WMA修饰的综合效应仍未得到充分探索.
研究的目的:
- 评估由芳香提取物RA和Sasobit® WMA添加剂修饰的高RAB含量 (30%和50%) 的青结合剂的质和老化性能.
- 研究将RA和WMA结合在高RAB结合剂中对性能特征的协同效应.
- 为了确定使用这些改性结合剂生产耐用,可持续的青路面的潜力.
主要方法:
- 准备的热混合和热混合青粘合剂含有30%和50%的RAB,经RA和WMA修改.
- 粘合剂在未老化的,滚动薄膜炉 (RTFO) 和压力老化容器 (PAV) 的老化条件下.
- 进行了旋转粘度 (RV),流动激活能量 (FAE),多重应力爬行恢复 (MSCR),线性振幅扫描 (LAS),频率扫描和曲束度计 (BBR) 测试.
主要成果:
- RAB增加了粘度和热稳定性,但降低了疲劳寿命和低温破裂阻力.
- WMA提高了耐老化性能,降低了化易感性,而RA提高了柔性和低温性能,但降低了化性能.
- RA和WMA的组合显示出协同效应,显著增强疲劳寿命 (70-270%) 和恢复低温性能,而WMA抵消了RA对化的负面影响.
结论:
- 高RAB含量的RA和WMA的整合产生了具有平衡的形状的青粘合剂,改善了老化耐久性,以及优越的疲劳和低温耐受性.
- 这种方法提供了一种可行的策略,用于生产高质量,可持续的青路面,具有增强的性能特征.
- 该研究强调了结合RA和WMA的潜力,以克服高RAB青混合物中单个添加剂的局限性.
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