Influence of Buton Rock Asphalt on the Physical and Mechanical Properties of Asphalt Binder and Asphalt Mixture

Table 2

Influence of different rock asphalt contents on the properties of the asphalt binder.

Test items	Sample types
	Pure asphalt	Pure asphalt + 10% BRA	Pure asphalt + 20% BRA	Pure asphalt + 30% BRA	Pure asphalt + 40% BRA	Pure asphalt + 50% BRA
Penetration (25°C, 100 g, 5 s) (0.1 mm)	73	66	58	55	46	32
Softening point (°C)	46	48	50	52	58	60
Ductility (15°C, 5 cm/min) (cm)	100	68	42	34	21	12
Kinematic viscosity at 135°C (Pa·s)	0.452	0.476	0.512	0.625	0.856	1.343
Difference of softening points between 0 and 48 hours (°C)	—	0.5	1	1.5	2.5	4
Ratio of penetrations before and after RTFOT test	71	75	81	86	83	82