Effect Investigation of Ultraviolet Ageing on the Rheological Properties, Micro-Structure, and Chemical Composition of Asphalt Binder Modified by Modifying Polymer

Figure 7

Microstructure of 70# asphalt at different UV ageing stages. (a) 76.25 h-200 time. (b) 152.5 h-200 time. (c) 228 h-200 time. (d) 305 h-200 time. (e) 76.25 h-2000 time. (f) 152.5 h-2000 time. (g) 228 h-2000time. (h) 305 h-2000 time.