# Preparation and Properties of SBS/REOB-Modified Rejuvenated Asphalt  
[PERSON]  
1 School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250337, China; [EMAIL_ADDRESS] (Y.C.); [EMAIL_ADDRESS] (L.Z.); [EMAIL_ADDRESS] (M.Y.) 1  
[PERSON]  
1 School of Civil Engineering, Central South University, Changsha 410083, China; 11 [EMAIL_ADDRESS] 1  
[PERSON]  
1 School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250337, China; [EMAIL_ADDRESS] (Y.C.); [EMAIL_ADDRESS] (L.Z.); [EMAIL_ADDRESS] (M.Y.) 1  
[PERSON]  
1 School of Civil Engineering, Central South University, Changsha 410083, China; 11 [EMAIL_ADDRESS] 1  
[PERSON]  
1 School of Civil Engineering, Shandong University, Jinan 250061, China; 1 [EMAIL_ADDRESS] (C.Z.); [EMAIL_ADDRESS] (S.Z.); Tel.: +86-136-7882-4225 (J.L.); +86-138-7310-1557 (S.Z.) 1  
[PERSON]  
2 School of Civil Engineering, Central South University, Changsha 410083, China; [EMAIL_ADDRESS] (M.Y.) [EMAIL_ADDRESS] (M.Y.) 20  
the advantage of short-term anti-aging performance, but the long-term effect was slightly worse. Previous studies have confirmed that REOB can improve the temperature sensitivity, viscoelasticity, and rutting resistance of aging asphalt, but the improvement effect on low-temperature crack resistance and fatigue performance is poor, and the rejuvenated asphalt cannot usually recover the performance level of new matrix asphalt. Therefore, in order to further optimize the performance of asphalt, the composite modification of aging asphalt can be considered to solve the problems of poor or insufficient improvement of asphalt performance with a single modifier.  
At present, there is no research into the modification of REOB rejuvenated asphalt. The most widely used asphalt modifier is a styrene-butadiene-styrene triblock copolymer (SBS), which is characterized by high elasticity, no softening at high temperature, and no brittleness at low temperature. [PERSON] and [PERSON] [6] found that the construction workability and thermal storage stability of stabilized rubber powder modified asphalt with an SBS modifier were greatly improved compared with that of modified asphalt with a single rubber modifier. At the same time, the high- and low-temperature performance of stabilized rubber powder modified asphalt was also enhanced. [PERSON] [7] believes that two modifiers in the composite modified asphalt at the same time will change the proportion of components in the asphalt, so as to improve the basic performance of the asphalt. Therefore, SBS-modified asphalt not only has good high- and low-temperature performance, but also has good elastic recovery performance and fatigue resistance.  
Based on this, combined with the advantages of an SBS modifier, this study proposed SBS/REOB-modified rejuvenated asphalt technology, determined the optimal dosage of SBS/REOB-modified rejuvenated asphalt, and studied its rheological properties under the optimal dosage. On the basis of making full use of waste REOB, the improvement effect of SBS on asphalt was introduced, so as to greatly improve the road performance of reclaimed asphalt and reduce the cost of reclaimed asphalt technology, which has important social and economic benefits and engineering application value.