Evaluating the Surface Free Energy and Moisture Sensitivity of Warm Mix Asphalt Binders Using Dynamic Contact Angle

Table 8

SFE components of asphalt binders (receding contact angle).

Binder type	Cecabase additive %	Aging	Nonpolar component (ergs/cm^2)	Basic component (ergs/cm^2)	Acidic component (ergs/cm^2)	Polar component (ergs/cm^2)	Total SFE (ergs/cm^2)
PG-64	0.0	Unaged	21.03	25.65	0.000	0.22	21.26
		RTFO	23.30	26.06	0.000	0.14	23.44
		PAV	22.70	21.95	0.014	1.12	23.82
	0.2	Unaged	23.33	26.21	0.017	1.35	24.68
		RTFO	23.34	25.30	0.000	0.20	23.54
		PAV	22.43	26.82	0.028	1.72	24.15
	0.3	Unaged	23.63	27.53	0.048	2.29	25.92
		RTFO	24.24	25.80	0.007	0.86	25.10
		PAV	23.52	24.88	0.004	0.62	24.14
	0.4	Unaged	25.33	25.94	0.022	1.52	26.85
		RTFO	26.84	27.83	0.082	3.03	29.86
		PAV	24.56	25.23	0.012	1.08	25.64
PG-76	0.0	Unaged	22.46	29.30	0.001	0.32	22.78
		RTFO	23.25	29.04	0.002	0.42	23.67
		PAV	23.30	26.21	0.000	0.20	23.49
	0.2	Unaged	23.53	28.05	0.004	0.67	24.20
		RTFO	24.89	31.46	0.062	2.79	27.68
		PAV	23.56	26.28	0.010	1.01	24.57
	0.3	Unaged	23.88	26.85	0.034	1.90	25.78
		RTFO	24.11	28.52	0.029	1.81	25.92
		PAV	24.14	25.80	0.045	2.16	26.30
	0.4	Unaged	24.55	26.33	0.032	1.84	26.39
		RTFO	23.90	28.17	0.034	1.95	25.85
		PAV	23.02	25.03	0.018	1.35	24.37