Antiaging Property and Mechanism of Phase-Change Asphalt with PEG as an Additive

Table 3

Effects of different PEG dosage on antiaging properties of asphalt.

	Index		PEG content (%)
			0	5	10	15
Aging states	Unaged	Penetration (25°C, 100 g, 5 s) (0.1 mm)	65	79	98	115
		Softening point (°C)	53.0	48.5	49.0	53.0
		Ductility (5 cm/min, 15°C) (cm)	150	135	119	107
		Viscosity (135°C, mPa·s)	364	403	432	490
	RTFOT aged	Penetration (25°C, 100 g, 5 s) (0.1 mm)	34	39	45	56
		Softening point (°C)	55.0	50.5	50	55.5
		Ductility (5 cm/min, 15°C) (cm)	13.7	12.7	15.4	11.3
		Viscosity (135°C, mPa·s)	635	725	821	833
Penetration ratio (%)			52.3	52.4	53.9	52.7
Ductility ratio (%)			9.1	9.4	12.9	10.6
Viscosity ratio () (%)			1.7	1.8	1.9	1.7
SP increment (°C)			2	2	1	2.5