Testing and Evaluation of Hard Sandstone Aggregate in Hot Mix Asphalt

Table 6

Properties of SBS-modified asphalt.

Properties	Unit	Technical requirements	Results
Penetration depth at 25°C, 100 g, 5 s	0.1 mm	40–60	50
Softening point (ring and ball method)	°C	≥60	85.0
Ductility at 5 cm/min, 5°C	cm	≥20	39
Specific relative density at 15°C	—	—	1.060
Rolling thin-film oven test at 163°C
Weight change	%	±1.0	−0.105
Retained penetration	%	≥65	67
Ductility at 5°C	cm	≥15	19