Abstract: In order to explore the effect of waterborne epoxy resin on the high-temperature performance of emulsified bitumen, the modified emulsified asphalt samples with 0%, 5%, 10% and 15% waterborne epoxy resin content were prepared, and the cylindrical specimens with diameter of 25 mm and height of 1 mm were cut by modified low temperature evaporation method after incubation at 40 ℃ for 11 days. Based on the dynamic shear test (DSR) and the multiple stress creep recovery test (MSCR), the rutting factor (G*/sinδ) and the non-recoverable creep compliance（Jnr）of the specimens were measured after holding for 30 minutes at 58 ℃ , 64 ℃, 70℃ and 76 ℃, respectively. The results show that waterborne epoxy resin can improve the permanent deformation resistance of emulsified asphalt at high temperature, reduce the viscous part of the emulsified asphalt during creep process, and reduce the cumulative deformation. When evaluating the high-temperature performance of waterborne epoxy resin modified emulsified asphalt, the temperature should be selected between 58 ℃~64 ℃. To ensure the high-temperature performance, the optimum content of waterborne epoxy resin is 10%.

Key words: highway engineering, waterborne epoxy resin, emulsified asphalt, rutting factor, dynamic shear rheological test, multi-stress creep recovery test

摘要： 为了研究水性环氧树脂对乳化沥青高温性能的影响，制备了水性环氧树脂掺量分别为0%、5%、10%、15%的改性乳化沥青乳液；利用修 正低温蒸发法将乳液在40 ℃条件下养生11 d后裁剪成直径25 mm、高1 mm的圆柱形试件；基于动态剪切流变试验(DSR)、多应力蠕变恢复试 验(MSCR)，分别测定试件在58、64、70及76℃下保温30 min后的车辙因子(G*/sinδ)、不可恢复蠕变柔量(Jnr)。研究表明：水性环氧树脂 可提高乳化沥青的高温抗永久变形能力并降低乳化沥青蠕变过程中的黏性部分，减少累积变形；在评价水性环氧树脂改性乳化沥青的高温性 能时，温度应选在58～64℃之间；为确保高温性能，水性环氧树脂的最佳掺量为10%。

关键词: 道路工程, 水性环氧树脂, 乳化沥青, 车辙因子, 动态剪切流变试验, 多应力蠕变恢复试验