Effect of Polyester Fiber on Air Voids and Low-Temperature Crack Resistance of Permeable Asphalt Mixture

Table 4

Technical indexes of polyester fiber.

Project	Performance	Pavement requirements
Length (mm)	12 ± 2	≥3
Diameter (μm)	20 ± 2.5	20 ± 5
Strength (MPa)	500∼680	≥500
Elongation at break (%)	15∼35	≥15
Young’s modulus (GPa)	＞13.5	—
Proportion	1.36	1.36 ± 0.05
Melting point (°C)	259	≥258