1. The amount of SBS has an effect on the performance of modified bitumen. With the increase of the amount of SBS, the low temperature property, the resilience, the ductility and the rheological property of the modified bitumen are improved. In addition, the increase of SBS dosage also leads to the decrease of the penetration of modified bitumen, the increase of softening point, the increase of plastic range, and the improvement of cold and heat resistance.

2. The dispersion state of SBS in bitumen will also affect the performance of modified bitumen. When SBS forms a continuous phase in bitumen and has a network structure, the performance of modified bitumen is the best. The modified bitumen has good high temperature fatigue resistance, impact resistance, aging resistance and excellent low temperature performance.

In summary, the performance of SBS modified bitumen is affected by the amount of SBS and the dispersion state. Appropriately increasing the amount of SBS and making it form a continuous phase in the bitumen with a network structure can improve the performance of the modified bitumen, including low temperature performance, rebound rate, rheological property, penetration degree, softening point, plastic range, cold and heat resistance, high temperature fatigue resistance, impact resistance and aging resistance.