Pavement and Noise Reduction Performance of Open-Graded Asphalt Friction Course Improved by Waste Tire Crumb Rubber

Table 2

Performance index of 70# asphalt.

Items	Softening point/°C	Penetration (25 °C,5s,100 g)/（0.1 mm）	Ductility (10 °C)/cm	Viscosity (135 °C)/(Pa·s)
Test results	61.4	65.6	35.2	0.27
Requirements	>46	60–80	>20	—