Evaluating the Change Characteristics of the Microstructure of the Modified Plant Asphalt Using Soft Computing to Improve the Road Performance for Green Environment

Table 1

Index of matrix asphalt.

Pilot projects	Measured value	Requirements
Penetration (25°C)	82.5	80∼100
Penetration index	−1.16	−1.5∼1.0
Ductility	>100	100
60°C dynamic viscosity (Pa · s) is not less than	175	140
Softening point (ring and ball method， °C) is not less than	47.8	44
Density (25°C) (g/cm³)	1.037	Measured
Solubility (trichloroethylene) is not less than (%)	99.8	99.5
Mass loss is not greater than (%)	−0.23	±0.8
Penetration is not less than (%)	9.4	>8
Softening point	52.3	—