Comparison of Asphalt Mixtures Designed Using the Marshall and Improved GTM Methods

Table 1

No. 70 asphalt test results.

Test	Method	Specified value	Measured value
Penetration (0.1 mm)	25°C, 100 g, 5 s	60–80	61
	15°C, 100 g, 5 s	—	20
	30°C, 100 g, 5 s	—	113
Penetration index (PI)	—	−1.5 to +1.0	−1.42
Ductility (cm)	5 cm/min, 15°C	≮100	>100
	5 cm/min, 10°C	≮15	>100
Softening point (°C)	Ring and ball method	≮46	47.0
Dynamic viscosity (Pa·s)	60°C	≮180	191.9
Kinematic viscosity (Pa·s)	135°C	—	0.365