Evaluation of the Physical and Adhesive Properties of Natural Weathering Asphalt

Table 7

Surface free energy components of asphalt.

Asphalt	Aging time (year)	(mJ·m^−2)	(mJ·m^−2)	(mJ·m^−2)
A70	0	14.49	11.95	2.55
	1	16.17	14.69	1.48
	2	16.20	14.72	1.48
	3	16.52	15.35	1.17
	4	16.94	15.86	1.08
SBSMA	0	14.48	11.52	2.97
	1	15.68	13.80	1.87
	2	17.16	15.82	1.34
	3	17.00	15.88	1.12
	4	16.92	15.78	1.15
AR	0	15.63	13.60	2.03
	1	17.24	15.72	1.52
	2	17.44	16.17	1.27
	3	17.15	15.90	1.25
	4	16.77	15.16	1.61