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Preparation of IC Level Karamay SBS Modified Asphalt
Xu Lei, Huang Wei, Cong Yufeng, Zhang Chunxue, Liu Zhijun
Karamay SBS modified asphalt was prepared to meet the requirements of the specifications for SBS (IC) asphalt by adding hard asphalt, petroleum resin and additives. The effects of hard asphalt, petroleum resin and additives on the softening point, penetration and storage stability of SBS modified asphalt were investigated. When the dosage of modifier SBS, hard asphalt, petroleum resin and the additives were 5%, 3%, 3%, and 2% respectively, SBS modified Karamay asphalt's softening point was 55.6 ℃, the penetration was 60.7 (0.1 mm), ductility at 5 ℃ was 31.2 cm, and the difference of softening point from the top and the bottom of storage tube was 1.2 after 48 h of storage at 163 ℃.The properties of said modified asphalt met the requirements of the specifications for SBS (IC) asphalt.
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