Using the Rheological Index to Quantitatively Evaluate the Mechanical Performance of High-Elasticity Modified Asphalt

Table 1

Performance of different modified asphalt binders with various modifier dosages.

Test item		Unit	HEA1	HEA2	HEA3	HEA4	HEA5
Penetration (25°C, 100 g, 5 s)		0.1 mm	61	59	58	55	60
Penetration index		—	0.10	0.22	0.42	0.77	0.53
Ductility (5°C, 5 cm/min)		cm	54	53	58	43	45
Softening point (ring and ball method)		°C	＞90	＞90	＞90	＞90	＞90
Flash point (opening)		°C	＞260	＞260	＞260	＞260	＞260
Storage stability (softening point difference) (165°C, 48 hr)		°C	1.5	1.5	2.0	4.5	3.0
Elastic recovery (25°C, 10 cm)		%	94	95	99	96	98
Dynamic viscosity (60°C)		Pa·s	169403	430521	761774	440524	450535
Kinematic viscosity (135°C)		Pa·s	2.3	2.5	3.1	3.8	4.0
Residue of RTFOT (163°C, 75 min)	Elastic recovery (25°C, 10 cm)	%	80	85	88	87	86
	Penetration ratio (25°C)	%	95	95	98	98	95
	Ductility (5°C, 5 cm/min)	cm	28	30	35	35	30