Road Performance and Microscopic Mechanism Analysis of Modified Straw Fiber Asphalt Binder

Table 2

Physical properties of 70# asphalt.

Parameter	Value	Technical requirements
Penetration (25°C) (mm)	69	60–80
Softening point (°C)	47.1	≮46
Ductility (5 cm/min, 10°C) (cm)	29	≮15
Ductility (5 cm/min, 15°C) (cm)	≥150	≮100
Density (g/cm^3)	1.027	Actual test
Flash point (°C)	269	≮260
Solubility (%)	99.7	≮99.5