第44卷第4期2018年4月北京工业大学学报JOURNAL OF BEIJING UNIVERSITY OF TECHNOLOGY Vol.44No.4Apr.2018
水性环氧树脂改性乳化沥青混合料性能
季 节1,2,刘禄厚1,2,索 智1,杨 松3,许 鹰1,徐世法1,2
(1.北京建筑大学土木与交通工程学院,北京 100044;2.北京未来城市设计高精尖创新中心,北京 100044;3.中咨公路养护检测技术有限公司,北京 100089)摘 要:为了解决现有冷拌冷铺沥青混合料性能不足的问题,研究了水性环氧树脂改性乳化沥青混合料的性能.采用先乳化后改性的方法制备了水性环氧树脂改性乳化沥青,利用击实试验和马歇尔设计方法确定了混合料的最佳外掺水量和最佳乳化沥青用量,对比分析了其击实和养生方式,并利用车辙试验二低温弯曲破坏试验二浸水马歇尔试验二疲劳试验等分别评价了其高温性能二低温性能二水稳定性能和疲劳性能.试验结果表明:采用第一次击实50次二110?养生24h二第二次击实25次二室温静置24h 的最佳击实和养生方式,可使水性环氧树脂改性乳化沥青混合料的密度二空隙率二水分挥发量和稳定度达到最优.同时,与热拌沥青混合料性能相比,水性环氧树脂改性乳化
沥青混合料的高温性能优越,低温性能和疲劳性能不足,水稳定性能基本保持一致.
关键词:水性环氧树脂;改性乳化沥青混合料;击实试验;马歇尔设计方法;击实和养生方式
中图分类号:U 416文献标志码:A 文章编号:0254-0037(2018)04-0568-09
doi :10.11936/bjutxb2017050014收稿日期:2017-05-08
基金项目:北京市教育委员会市属高校创新能力提升计划资助项目(PXM2015-014210-000003);国家自然科学基金资助项目(51478028,51778038)作者简介:季 节(1972 ),女,教授,主要从事道路材料方面的研究,E-mail:jijie@https://www.doczj.com/doc/664004163.html, Evaluation on Performances of Modified Emulsified Mixture With Waterborne Epoxy Resin
JI Jie 1,2,LIU Luhou 1,2,SUO Zhi 1,YANG Song 3,XU Ying 1,XU Shifa 1,2
(1.School of Civil Engineering and Transportation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;
2.Beijing Advanced Innovation Center for Future Urban Design,Beijing 100044,China;
3.CHECC Highway Maintenance and Test Technology Co.Ltd.,Beijing 100089,China)Abstract :In order to improve the performance of cold and mix asphalt mixture,a new modified emulsified mixture with waterborne epoxy resin was developed.The waterborne epoxy modified emulsified asphalt binder was prepared by the method of pre emulsification and modification.A compaction test was conducted and Marshall method was used to design the optimum water content and modified emulsified asphalt content.The different compaction and curing styles were compared.High-temperature rutting test,low-temperature bending test,immersion Marshall test and fatigue test were conducted to estimate its high-and-low temperature performance,water sensitivity and fatigue performance.The test results show that the best compaction and curing style is compacting sample 50times at the first time,putting sample at 110?oven for 24hours,compacting sample 25times for the second time,and putting sample in air for 24hours;compared with the performances of hot mix asphalt,the high-temperature performance of modified emulsified mixture with waterborne epoxy resin is significantly increased,but the low-temperature and fatigue performance are lower,and the water sensitivity is almost the same.
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