Experimental Study on the High-Temperature and Low-Temperature Performance of Polyphosphoric Acid/Styrene-Butadiene-Styrene Composite-Modified Asphalt

Table 1

The results of performance tests and four component analysis of asphalt binders.

Physical properties and chemical component	SK90	ZH90
Penetration (25°C, 0.1 mm)	86.5	81.0
Softening point (°C)	45.5	46.0
Ductility (15°C, cm)	>100	>100
Penetration ratio (%)	72.0	70.6
Ductility (cm)	9.3	8.0
Mass loss (%)	0.9	1.0
Performance grade (°C)	58–22	58–22
Stiffness modulus (MPa, −12°C)	231	243
Creep rate (MPa/S, −12°C)	0.351	0.342
Asphaltene (%)	8.63	7.34
Resin (%)	17.40	29.28
Aromatics (%)	44.78	36.62
Saturates (%)	24.20	23.41