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

Table 3

SBS4303 technical indexes.

Index	Quality index	Value
1	Total ash (%)	≤0.25
2	Volatile matter (%)	≤0.5
3	Combined styrene content (%, mass fraction)	30 ± 2.0
4	300% fixed elongation stress (MPa)	≥2
5	Tensile strength (MPa)	—
6	Elongation at break (%)	≥550
7	Rupture permanent deformation (%)	—
8	Solution flow rate (g/10 min)	0.01–0.5