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

Table 4

Calculating values of R and..

Asphalt type	Ageing time/h	0.1 kPa		3.2 kPa
		R (%)		R (%)
70#	76.25	1.48	0.38	0.18	0.45
	152.5	2.89	0.37	0.18	0.45
	228	7.35	0.29	0.24	0.39
	305	2.31	0.37	0.2	0.43
PA	76.25	3.84	0.33	0.23	0.41
	152.5	6.63	0.27	0.28	0.40
	228	6.77	0.24	0.31	0.35
	305	4.90	0.28	0.38	0.32