Study on Void Structure Reconstruction of Asphalt Mixture by X-Ray Computed Tomography and Otsu’s Method

Table 2

Properties of SBS-modified asphalt and high-viscosity asphalt.

Properties	Value		Testing method [11]
	SBS-modified asphalt	High-viscosity asphalt
Penetration (25°C, 0.1 mm)	54	53	T0604
Ductility (5°C, 5 cm/min)	39	46	T0605
Softening point (°C)	77	120	T0606
Density (15°C, g/cm3)	1.03	1.04	T0662
TFOT residue (163°C, 5 h)
Mass loss (%)	−0.3	−1.6	T0610
Residue penetration (°C)	92	182	T0604
Ductility (5°C, 5 cm/min)	10.3	10.6	T0605

Note: the testing method is conducted according to the Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering (JTG E20-2011) [15].