Abstract: In order to study the curing-demulsification time of waterborne epoxy emulsified asphalt and the bonding performance of cured products, the curing rate of waterborne epoxy was adjusted by adding accelerators at the test temperature of 10 ℃, 25 ℃ and 40 ℃, and the curing time of waterborne epoxy and the complete demulsification time of the emulsified asphalt were measured by pullng test respectively to study the effects of temperature, accelerator dosage, curing-demulsification time difference on the bonding strength of waterborne epoxy emulsified asphalt. In addition, the infrared absorption properties of the waterborne epoxy emulsified asphalt with accelerator were also analyzed. The results show that the curing time of waterborne epoxy resin and the emulsified asphalt is significantly affected by temperature. The curing-demulsification time diffe-rence of the waterborne epoxy emulsified asphalt is 48 h, 8 h and 6 h at 10 ℃, 25 ℃ and 40 ℃, respectively, and the addition of accelerator can shorten the time difference by 42 h, 10 h and 8 h respectively, to realize the curing-demulsification rate control of the waterborne epoxy emulsified asphalt; the curing-demulsification time of waterborne epoxy emulsified asphalt is 36 h, 2.5 h and 2 h at each temperature. The curing-demulsification time difference of the waterborne epoxy emulsified asphalt at above temperatures to reach the maximum curing strength is 36 h, 2.5 h and 2 h respectively. No new infrared characteristic peak was produced when the accelerator was added into the waterborne epoxy resin and the waterborne epoxy emulsified asphalt. Compared with the waterborne epoxy resin without accelerator, its curing degree is higher after the same curing time, indicating that accelerator can effectively accelerate the epoxy resin curing reaction. The study provides a reference for material optimization and construction control of the waterborne epoxy emulsified asphalt.
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2022, Vol. 36 
