Curing Behavior and Mechanism of Waterborne Epoxy Asphalt

ABSTRACT This study aims to examine the curing behavior and mechanism of waterborne epoxy asphalt (WEA) intended for use as tack coats. The curing behavior of WEA was investigated via a series of laboratory tests, whereas the mechanism was analyzed using fluorescence microscopy and infrared spectroscopy. Results indicate that waterborne epoxy resin (WER) effectively enhances the performance of emulsified asphalt, particularly in terms of bonding strength and heat resistance. Furthermore, the WER system (WER and curing agent) exhibits excellent dispersion and evenly integrates into the asphalt. It forms a network‐like cross‐linked structure within the asphalt at a WER dosage of 9%. The strength mechanism of WEA involves a combination of curing reactions, physical interweaving, and chemical cross‐linking. Thus, WEA demonstrates favorable properties and stability.