Influence of PPA on the Short-Term Antiaging Performance of Asphalt

Table 4

Three indexes and viscosity of PPA-modified asphalt before and after aging.

Parameters measured		0% PPA	0.4% PPA	0.8% PPA	1.2% PPA
Penetration at 25°C (0.1 mm)	Unaged	80.2	66.8	55.9	45.5
	Aged	46.5	51.5	46.7	44.1
Softening point (°C)	Unaged	46.3	49.5	53.0	58.0
	Aged	53.8	54.0	56.0	60.2
Ductility at 10°C (cm)	Unaged	113.6	22.2	13.1	7.8
	Aged	98.3	14.3	7.2	1.4
Viscosity at 135°C (mPa·s)	Unaged	415.0	562.0	690.0	1020.0
	Aged	620.0	750.0	830.0	1140.0