Effects of WMA Additive on the Rheological Properties of Asphalt Binder and High Temperature Performance Grade

Table 6

Critical temperature and high-temperature performance grade.

Asphalt binders	Requirement of for H-T PG (kPa)	Critical temperature (°C)	H-T PG
Asphalt 70#	1.0	66.7	PG-64
Asphalt 70# + 1% additive		68.8	PG-64
Asphalt 70# + 3% additive		70.9	PG-70
Asphalt 70# + 5% additive		74.3	PG-70
Aged asphalt 70#	2.2	68.3	PG-64
Aged asphalt 70# + 3% additive		72.4	PG-70
Asphalt 90#	1.0	64.2	PG-64
Asphalt 90# + 1% additive		66.7	PG-64
Asphalt 90# + 3% additive		69.7	PG-64
Asphalt 90# + 5% additive		71.7	PG-70