Applying solution of spray polyurea elastomer in asphalt binder: Feasibility analysis and DSR study based on the MSCR and LAS tests

Abstract The polyurea elastomer (PUA) powder modifier was prepared by the method of spraying–initial crushing–fine grinding, and then, PUA-modified asphalt produced. typical functional structure PUA identified characterized. apparent viscosity tested at different temperatures. impact particle size content on creep recovery properties high temperature investigated through multiple stress test. mesothermal fatigue behavior evaluated means time sweep linear amplitude sweep. Results indicated that elastic materials might depend spherical inside material. diameter around 20 µm presented as 3D ball structure. increase in would lead to cracks folds bonding surface could improve about 50% significantly. Furthermore, promote high-temperature rutting resistance middle-temperature property asphalt. improving effect R reach almost 28% 0.075 mm be best application PUA.