耐高温不粘轮乳化沥青的制备与性能研究  

Preparation and Performance of Emulsified Asphalt with High-Temperature Resistant and Wheel Sticking-Free Effects

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作  者:严涵 查旭东[1] 康潇刚 龚演 张政基 张文帅 YAN Han;ZHA Xudong;KANG Xiaogang;GONG Yan;ZHANG Zhengji;ZHANG Wenshuai(School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;School of Civil Engineering and Transportation,North China University of Water Resources and Electric Power,Zhengzhou,Henan 450045,China;Research Institute of Highway Ministry of Transport,Beijing 100088,China)

机构地区:[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]华北水利水电大学土木与交通学院,河南郑州450045 [3]交通运输部公路科学研究院,北京市100088

出  处:《中外公路》2025年第1期80-87,共8页Journal of China & Foreign Highway

基  金:国家重点研发计划项目(编号:SQ2021YFB3200301);中央级公益性科研院所基本科研业务费专项资金资助项目(编号:2023-9035)。

摘  要:针对现有的黏层不粘轮乳化沥青施工过程中存在的高温粘轮问题,根据高温不粘轮要求,该研究采用70^(#)、15^(#)基质沥青和水性聚氨酯树脂复合改性的方法,制备硬质沥青-水性聚氨酯树脂(Hard Asphalt-Waterborne Polyurethane Resin,HA-WPR)改性乳化沥青;通过一系列室内试验对其技术性能、不粘轮性能、层间黏结性能进行研究,并与普通不粘轮乳化沥青和普通乳化沥青黏层油进行对比。结果表明:HA-WPR改性乳化沥青技术性能均满足规范要求,乳化效果和储存稳定性较好;在60℃和65℃高温条件下,当HA-WPR改性乳化沥青的掺配比例为30%的70^(#)沥青、70%的15^(#)沥青(沥青的质量比)和5%水性聚氨酯树脂(乳化沥青的质量比)时的黏附率最低,分别为0.8%和2.3%,相比普通不粘轮乳化沥青和普通乳化沥青黏层油,其高温不粘轮效果显著,并且破乳速度快,便于优化施工过程,提高效率;在室温和高温环境下,HA-WPR改性乳化沥青的层间抗剪强度均高于普通不粘轮乳化沥青和普通乳化沥青黏层油,其层间黏结强度更高,温度敏感性更弱,且具有良好的技术经济性。因此,HA-WPR改性乳化沥青可有效改善沥青路面黏层施工过程的高温粘轮现象,提升路面使用寿命,降低养护频率,具有较高的性价比。To address the problem of wheel sticking at high temperatures in the construction process of existing wheel sticking-free emulsified asphalt of tack coat,this paper adopted the composite modification method of 70^(#)and 15^(#)matrix asphalt and waterborne polyurethane resin(WPR)to prepare hard asphalt-WPR(HA-WPR)-modified emulsified asphalt in accordance with the high-temperature resistant and wheel sticking-free requirements.Through a series of laboratory tests,the technical performance,wheel sticking-free performance,and interlayer bonding performance of the emulsified asphalt were researched and compared with ordinary wheel sticking-free emulsified asphalt and ordinary emulsified asphalt tack coat oil.The results show that the technical performance of the HA-WPR-modified emulsified asphalt meets the specification requirements,and the emulsification effect and storage stability are better.Under the high-temperature conditions at 60℃and 65℃,when the blending ratio of HA-WPR-modified emulsified asphalt is 30%of the 70^(#)asphalt,70%of the 15^(#)asphalt(mass ratio of asphalt),and 5%of WPR(mass ratio of emulsified asphalt),the adhesion rate is the lowest,only 0.8%and 2.3%,respectively.Compared with the ordinary wheel sticking-free emulsified asphalt and the ordinary emulsified asphalt tack coat oil,its high-temperature resistant and wheel sticking-free effects are significant,and the demulsification speed is fast,which is convenient for optimizing the construction process and improving efficiency.At room temperature and high temperature,the interlayer shear strengths of the HA-WPR-modified emulsified asphalt are higher than that of ordinary wheel sticking-free emulsified asphalt and ordinary emulsified asphalt tack coat oil.Its interlayer bonding strength is higher;the temperature sensitivity is weaker,and it has good technical economy.Therefore,the HA-WPR-modified emulsified asphalt can effectively alleviate the phenomenon of wheel sticking at high temperatures in the construction process of asphalt pavement t

关 键 词:道路工程 改性乳化沥青 黏层 水性聚氨酯树脂 层间黏结性能 

分 类 号:U414[交通运输工程—道路与铁道工程]

 

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