Moisture Stability of Hard Sandstone Asphalt Mixture Based on APT with MMLS3

Table 4

Technical 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
Penetration index		—	≥0	1.152
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
Kinematic viscosity at 135°C		Pa·s	≤3	1.2
Flash point temperature		°C	≥230	303
Solubility in trichloroethylene		%	≥99	99.54
Elasticity recovery at 25°C		%	≥75	81
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