摘要
为研究自融冰沥青混合料的长期释盐特性以及盐分完全释放后对路面耐久性的影响,该文基于洛杉矶磨耗仪设计了一种加速自融冰沥青混合料盐分快速释放的方法,揭示不同沥青类型、除冰剂掺量及级配类型条件下的盐分释放规律,分析盐分完全释放后对路用性能的影响。结果表明:洛杉矶磨耗仪盐分释放法的盐分释放效率较磁力旋转器盐分释放法的提升了91倍,较自然浸泡盐分释放法的提升了114倍;自融冰沥青混合料使用SBS改性沥青拥有更长的盐分释放时间,盐分释放时间与除冰剂的掺量成正比,SMA⁃13型自融冰沥青混合料盐分释放均匀性较差。盐分完全释放后,自融冰沥青混合料的高温稳定性衰减31.6%,低温性能衰减15.4%,水稳定性衰减26.7%。
To study the long-term salt release characteristics of self-melting ice asphalt mixture and the impact of the complete salt release on pavement durability,an accelerated salt release method was developed using a Los Angeles abrasion tester.The salt release mechanism under varying asphalt types,deicing agent contents,and gradation types was revealed.The impact of the complete salt release on road performance was analyzed.Results show that the Los Angeles abrasion tester-based salt release method achieves 91 times and 114 times higher salt release efficiency than the magnetic stirrer and natural immersion methods,respectively.SBS-modified asphalt mixture exhibits a longer salt release duration.The salt release duration is proportional to the deicing agent content.The SMA-13 self-melting ice asphalt mixture shows relatively poor salt release uniformity.After complete salt release,the high-temperature stability of the self-melting ice asphalt mixture decreases by 31.6%,low-temperature performance by 15.4%,and water stability by 26.7%.
作者
李涛
张修昂
LI Tao;ZHANG Xiu’ang(Jinan Tongda Highway Engineering Co.,Ltd,Jinan,Shandong 250200,China;Shandong Highway Bridge Testing Center Co.,Ltd.,Dongying,Shandong 257092,China)
出处
《中外公路》
2025年第3期46-53,共8页
Journal of China & Foreign Highway
基金
国家自然科学基金资助项目(编号:51208287)。
关键词
自融冰沥青混合料
创新型盐分释放方法
长期盐分释放规律
路用性能变化
self-melting ice asphalt mixture
innovative salt release method
long-term salt release mechanism
road performance change
