Composition Optimization and Durability Evaluation of Waterborne Epoxy Modified Emulsified Asphalt for Road
FU Hao1, WANG Chaohui1,*, LIU Luqing1, LIU Wei2,3, YU Sixin2,3
1 School of Highway, Chang'an University, Xi'an 710064, China 2 Shandong Hi-speed Group Co., Ltd., Jinan 250098, China 3 Shandong Hi-speed Transportation Construction Group Co., Ltd., Jinan 250101, China
Abstract: To improve the service quality and durability of modified emulsified asphalt in the field of road engineering, a variety of waterborne epoxy modified emulsified asphalt (WEREA) were prepared. The composition of WEREA was optimized based on its tensile properties. The adhesion, standard viscosity, drying time, compatibility and bonding properties of WEREA were studied. The relationship between the bonding properties of WEREA and its tensile and adhesion properties was analyzed. The destructive effect of complex climatic conditions on WEREA was simulated by means of damp heat aging, freeze-thaw cycle and xenon lamp aging. Taking the residual tensile, adhesion and bonding properties after aging and the change rate of various properties before and after treatment as the evaluation index, the durability of WEREA was comprehensively evaluated by the ideal point method of entropy weight. The results show that waterborne epoxy resin can effectively improve the tensile strength and adhesion of emulsified asphalt. These WEREA have sufficient fluidity and suitable drying time. Waterborne epoxy resin has good compatibility with emulsified asphalt. It is suggested that the content of waterborne epoxy resin is 15%—25%, the bonding performance of WEREA has a strong correlation with its mechanical strength and adhesion performance. After damp heat aging, freeze-thaw cycle or xenon lamp aging treatment, the performance retention rates of tensile, adhesion and bonding of WEREA are 84%—92%. The WEREA modified by polyurethane shows better durability, the comprehensive durability of polyurethane modified bisphenol A type E-51 WEREA is the best.
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2023, Vol. 37 
