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水性环氧乳液改性乳化沥青及微表处性能研究
作者：李悦1，赵晨轶1，黄舟2，吴玉生2，金彩云3
（1.北京工业大学 城市与工程安全减灾教育部重点实验室，北京 100124；
2.中国建材检验认证集团厦门宏业有限公司，福建 厦门 361026；3.北京工业大学 理学部，北京 100124）
摘要：考察了水性环氧乳液（WER）掺量对改性乳化沥青性能的影响，分析WER对乳化沥青的改性机理。采用WER改性乳化沥青制备MS-2型微表处混合料，并引入分散破乳剂来改善混合料的施工性能，通过正交试验得到WER和乳化沥青各组分的最佳掺量和最佳油石比。试验结果表明：随着WER掺量的增加，WER改性乳化沥青的低温性变差，抗老化性提高，6%掺量的WER与乳化沥青具有最佳的相容性和贮存稳定性；微表处混合料的最佳油石比为7.5%；当外加水量为3%、水泥掺量为1%、分散破乳剂掺量为0.25%时，所制备的微表处混合料具有良好的抗水损、抗车辙、抗拉性和粘结性，能满足路面正常使用需求。
关键词：改性乳化沥青；分散破乳剂；配合比设计；MS-2型微表处混合料
中图分类号：TU535 文献标识码：A 文章编号：1001-702X（2022）10-0001-07
Study on properties of waterborne epoxy resin modified emulsified asphalt and micro-surfacing mixture
LI Yue1，ZHAO Chenyi1，HUANG Zhou2，WU Yusheng2，JIN Caiyun3
（1.The Key Laboratory of Urban Security and Disaster Engineering，MOE Beijing University of Technology，Beijing 100124，China；
2.China Building Materials Inspection and Certification Group Xiamen Hongye Company，Xiamen 361026，China；
3.Department of Science of Beijing University of Technology，Beijing 100124，China）
Abstract：This paper investigated the influence of water-borne epoxy resin emulsion（WER） dosage on the properties of modified emulsified asphalt and analyzed the modification mechanism of WER on emulsified asphalt. Water-borne epoxy modified emulsified asphalt was used to prepare MS-2 micro-surfacing mixture，and dispersed demulsifier was introduced to improve the construction performance of the mixture. The best content of each component and the best asphalt-aggregate ratio were obtained through orthogonal test. The results show that 6% water-borne epoxy emulsion asphalt has the best compatibility and storage stability. With the increase of water-borne epoxy content，the low-temperature performance of water-borne epoxy emulsion asphalt becomes worse and the anti-aging performance increases. The optimum asphalt-aggregate ratio of MS-2 micro-surfacing is 7.5%. When the added water is 3%，the cement content is 1%，and the dispersed demulsifier content is 0.25%，the prepared micro-surfacing has good water damage resistance，rutting resistance，tensile strength and cohesiveness，which can meet the normal use requirements of pavement.
Key words：modified emulsified asphalt，dispersed demulsifier，mixture design，MS-2 micro surfacing mixture