Abstract: The effects of SBS types on the properties of Zhonghai 7# heavy duty road asphalt were investigated after the SBS modified asphalts were prepared under the same conditions. The results indicate that the modification effect on Zhonghai asphalt depends on the kinds of SBSs. The SBS (1301-1H) can improve the pavement performance of Zhonghai asphalt at high temperature, while the effect of SBS (796) on the low temperature property of Zhonghai asphalt is the best. The SBS（501）is the best in improving the ability to resist temperature sensitivity of asphalt. The compatibility between SBS (796) and Zhonghai asphalt is the best, proved by the test of storage stability at high temperature and fluorescence image analysis. Within the scope of the experimental investigation, the I-D modified asphalt can be obtained using the compound of SBS (501) and SBS (796), all the indexes of the asphalt product can meet the JTG F40-2004 technical requirements.

Key words: SBS type, modified asphalt, Zhonghai asphalt