Properties of Direct Coal Liquefaction Residue Modified Asphalt Mixture

Table 2

Properties of the asphalt binders (penetration system).

Items	SK-90 asphalt binder	SBS modified asphalt binder	DCLR modified asphalt binder	DCLR-composite modified asphalt binder
25°C penetration/(0.1 mm)	81.0	61.2	35.1	33.4
Softening point/°C	51.0	65.4	59.2	77.5
10°C ductility/cm	51.8	68.2/32.3 (5°C)	5.7	12.2
After Rolling Thin Film Oven (RTFO) test
Mass loss/%	+0.1	−0.2	+0.2	−0.1
Penetration ratio/%	64.1	64.2	69.3	79.5
10°C ductility/cm	8.0	39.6/21.8 (5°C)	4.2	9.7