Design Method and Cost-Benefit Analysis of Hybrid Fiber Used in Asphalt Concrete

Table 2

Physical properties of fibers.

Items	Lignin fiber	Polyester fiber	Polypropylene fiber
Diameter (μm)	42	20	22
Length (mm)	1.2	6.0	8.0
Specific gravity	1.32	1.46	0.95
Tensile strength (MPa)	N/A	517	440
Elongation at break (%)	18	33	24
Oil absorption rate (%)	5.68	3.88	2.85
Melting point (°C)	255	249	166