Composition and Evaluation on Road Performance of SBS/PTW High-Viscosity-Modified Asphalt and Its Mixtures for Ultrathin Overlays

Table 1

Properties of the matrix asphalt.

Items		Technical indexes	Results	Standard
Penetration (25°C, 100 g, 5 s), 0.1 mm		60∼80	67	JTG E20-T 0604
Ductility (15°C, 5 cm/min) (cm)		≥100	>100	JTG E20-T 0605
Dynamic viscosity (60°C) (Pa·s)		≥180	208	JTG E20-T 0620
Softening point (universal method) (°C)		≥46	48	JTG E20-T 0606
After RTFOT	Mass loss (%)	−0.8 to 0.8	−0.158	JTG E20-T 0609
	Residual needle penetration ratio (%)	≥61	63.4	JTG E20-T 0609
	Residual ductility at 10°C (cm)	≥6	6.3	JTG E20-T 0609