Material Composition Design and Anticracking Performance Evaluation of Asphalt Rubber Stress-Absorbing Membrane Interlayer (AR-SAMI)

Table 1

Technical indexes of SK90# raw asphalt.

Items		Measured value	Specification limits	Cited specifications
Penetration (25°C, 100 g, 5 s, 0.1 mm)		91	80∼100	ASTM D5-97
Penetration index (PI)		−0.2985	−1.0∼+1.0	—
Ductility (10°C, 5 mm/min, cm)		>100	≥45	ASTM D113-99
Softening point (°C)		48.9	≥45	ASTM D36-06
Specific gravity		0.979	—	ASTM D70-76
RTFO treated at 163°C for 85 min	Mass loss (%)	−0.34	≤±0.8	ASTM D2872-04
	Residual penetration ratio (25°C, %)	72.9	≥57	ASTM D5-97
	Residual ductility (10°C, cm)	15	≥8	ASTM D113-99