Table 1: Indicators of raw materials.

MaterialsPropertyValue

Matrix asphaltPenetration (25°C, 0.1 mm)83
Ductility (15°C, cm)>100
Softening point (°C)46
Penetration index−1.4
Dynamic viscosity (60°C, Pa·s)175
Density (g/cm3)1.004

SBSBlock ratio30/70
Tensile strength (MPa)21.6
Elongation at break (%)850
Relative molecular mass28 × 104

Silica fumeAppearanceGrey
SiO2 content (%)>92
pH6∼8
Particle size distribution (μm)0.1∼0.3
Granularity (mesh)300∼500
Loose density (g/cm3)0.1∼0.2
Tight heap density (g/cm3)0.3∼0.4
Specific surface area (m2/g)>25
Burning loss (%)<5
Impurity content (%)<8
Water content (%)<5