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Study on compatibility of SBS modified asphalt

FENG Xin-jun1,2,HAO Pei-wen1,XUE Hang(1.College of Highway Engineering,Changsha University of Science and Technology,Changsha 410076,China;2.College of Highway Engineering,Chang′an University,Xi′an 710064,China;3.Bureau of Kaifeng Highway Management,Kaifeng 475000,China)  
SBS modified asphalts were prepared through adding different brands of SBS into different kinds of asphalt at same processing condition,and their effect on SBS modified asphalt performance is analyzed via technical indexes.The results show that the star-type SBS doesn′t always improve asphalt pavement performance more obviously than the linear SBS,but the 30/70 of S/B ratio SBS modified asphalt has better pavement performance than the 40/60 of S/B ratio SBS.The same type of SBS modified asphalt has better pavement performance while its compatibility is better.SBS modified asphalts has very good compatibility when R-ratio of composition of asphalt base is above 3.Compatibility and pavement performance of SBS modified Lanlian asphalt have been greatly upgraded and met the national specification standard by adding proper compatilizer and stabilizer with proper amount.
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