Abstract: Addressing the urgent need for enhancement in interlayer adhesion, water damage resistance, and durability of chip seals, six types of resin-based modified emulsified asphalt—WER (waterborne epoxy resin)-WPU-I (anionic waterborne polyurethane), WER-WPU-II (non-ionic waterborne polyurethane), WER-SBR (polymerized styrene butadiene rubber), WPU-I-SBR, WER-WPU-II-SBR, and WER-WPU-II-EVA (ethy-lene vinyl acetate copolymer)— were prepared. The effects of water-based resin types on the drying time, adhesion, impact resistance, aggregate adhesion, tensile strength, low-temperature bending, and water resistance of emulsified asphalt were investigated. The optimal material composition and ratio of resin-base modified emulsified asphalt were determined. The modification mechanism of water-based resin polymers on emulsified asphalt was revealed. The anti-stripping and water resistance of the resin-modified emulsified asphalt chip seals were evaluated. The results indicate that the resin-modified emulsified asphalt has a practical drying time of 65—95 minutes at 25 ℃. The tensile strength of evaporation residues is 1.26 MPa.The impact strength is 5.68 kJ/m2 at -20 ℃, without cracking upon bending to 180°. WER-WPU-I and WER-WPU-II-SBR modified emulsified asphalts are recommended for chip seals, with an optimal water-based resin dosage of 15%. The water-based resin is evenly distributed in the emulsified asphalt at this case. Under 90%—110% stone coverage, the WER-WPU-I modified emulsified asphalt exhibits slightly better anti-stripping and water resistance than WER-WPU-II-SBR, with both chip seals showing mass loss rates below 15% and impermeability after wet wheel abrasion testing.
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2025, Vol. 39 
