Study on Mechanical Behavior of Aging Asphalt Based on Composite Regeneration and Modification

Table 12

Index comparisons of regeneration and modification about aging asphalt.

Type	Penetration/0.1mm	Ductility/cm	Softening point (°C)	Viscosity/135°C/Pa·s
	25°C	5°C
90# original asphalt	93	9.0	44.5	0.328
Aging asphalt (5 h)	60	4.2	49.7	0.407
First regenerating and then modifying asphalt (2.5% ⟶ 9%) (5 h)	45	31.5	52.0	0.600
First modifying and then regenerating asphalt (9% ⟶ 2.5%) (5 h)	60	31.0	51.9	0.645
Regenerating and modifying asphalt at the same time (2.5% + 9%) (5 h)	62	26.0	47.7	0.260
90# original asphalt	93	9.0	44.5	0.328
Aging asphalt (20 h)	27	3.9	55.6	0.760
First regenerating and then modifying asphalt (6% ⟶ 18%) (20 h)	38	30.2	58.0	0.621
First modifying and then regenerating asphalt (18% ⟶ 6%) (20 h)	54	28.1	52.7	0.660
Regenerating and modifying asphalt at the same time (6% + 18%) (20 h)	45	23.0	50.1	0.438