Fm Analysis Of Aging Properties Of Uv531/Sbs Modified Bitumen

Ultraviolet absorber UV531 and linear SBS modified bitumen were selected to prepare SBS modified bitumen via melt blending. Thermal-oxidative and ultraviolet (UV) aging of SBS modified bitumen were simulated by the film oven test (TFOT) and accelerated UV aging. The influence of UV531 on the micromorphology of SBS modified bitumen before and after aging was analyzed by fluorescent microscopy (FM). Combined with the three indicators and aging properties of modified bitumen, the relationship between microstructure and properties of SBS modified bitumen and UV531/SBS modified bitumen was discussed. The FM images show that the UV531 improves the thermal-oxidative aging property of SBS modified bitumen, but it has little effect on UV aging.