水性环氧改性乳化沥青的制备

Preparation of Waterborne Epoxy Resin Modified Emulsified Asphalt

制备水性环氧改性乳化沥青,改善乳化沥青作为修补料,其黏结性差、强度低、成型慢等缺点.采用自制的阳离子乳化沥青、四种常见的水性环氧树脂乳液及其相应的固化剂制备改性乳化沥青,通过界面拉伸试验、固化时间试验及与集料黏附性试验确定水性环氧树脂种类,通过最大抗拉伸强度值和断裂伸长率确定水性环氧树脂与乳化沥青最佳参配比例,用直掺法和机制法制备出同一种水性环氧乳化沥青进行性能测试对比.最终选用A4型的水性环氧树脂乳液,A4型固化剂,乳化沥青以1∶1∶8(质量比)的比例制备改性乳化沥青.其以黏结性好,强度高,成型快,现配现用的优点能很好的用作修补料.

Preparation of waterborne epoxy modified emulsified asphalt and improvement of emulsified asphalt as a repair material have the disadvantages of poor adhesion, low strength and slow molding.The modified emulsified asphalt was prepared with self-made cationic emulsified asphalt, four common waterborne epoxy resin emulsions and their corresponding curing agents.The types of waterborne epoxy resin were determined by interfacial tension test, curing time test and adhesion test with aggregates.According to the maximum tensile strength and elongation at break, the best blending ratio of water-based epoxy resin and emulsified asphalt was determined, and the same water-based epoxy emulsified asphalt was prepared by direct blending method and mechanism method for performance test and comparison. Finally, A4-type water-based epoxy resin emulsion, A4 curing agent, and emulsified asphalt were selected to prepare modified emulsified asphalt in a ratio of 1： 1： 8, which has the advantages of good adhesion, high strength and quick molding, and can be well used as a repair material.