Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone-Based Warm Mix Additives

Table 1

Basic properties of penetration grade 70# base asphalt used herein.

Test parameters	Specification	Test results
Penetration (25°C, 100 g, 5 s) (0.1 mm)	60–80	68.9
Ductility (5 cm/min, 15°C)	40	67
Softening point (°C)	46	46.3
Flash point (°C)	230	262
Density (g/cm^3)	—	1.03
Solubility in trichloroethylene (%)	99.5	99.8
RTFOT mass change (%)	0.8	0.3
Retained penetration (%)	58	78
Ductility (15°C) (cm)	15	44