关键词: 道路工程, 水性环氧树脂, 乳化沥青, 复数模量, 相位角, 车辙因子, 高温性能

Abstract: The emulsified asphalt modified by waterborne epoxy resin with different contents was studied. Through the temperature and frequency scanning of dynamic shear rheological test (DSR), the high-temperature rheological properties of 10%, 15%, 20% water-based epoxy resin, 3% SBR composite modified emulsified asphalt and SK90# matrix emulsified asphalt evaporation residue were compared and analyzed to determine the optimal dosage of water-based epoxy resin. The research results show that, in the test temperature range, the complex shear modulus G* of each emulsified asphalt material decreases with increasing temperature and increases with increasing frequency. And the phase angle δ of each emulsified asphalt decreases with the increase of the amount of aqueous epoxy resin. The phase angle δ of the lower content of waterborne epoxy resin and waterborne epoxy/SBR composite modified emulsified asphalt material increases with the increase of temperature and decreases with the increase of frequency. 20% water-based epoxy resin/SBR composite modified emulsified asphalt has the best high temperature deformation resistance and rheological property. The optimum amount of waterborne epoxy resin is 20%.

Key words: highway engineering, waterborne epoxy resin, emulsified asphalt, complex modulus, phase angle, rutting factor, high temperature performance