Preparation of SBS and crumb rubber composite modified asphalt and performance evaluation of porous mixture
A high-viscosity modified asphalt for PA(porous asphalt)was prepared using SBS and CR(crumb rubber),as well as tackifiers and stabilizers.The optimal amount of each component was de-termined based on penetration,softening point,ductility and dynamic viscosity at 60 ℃,and the road performance of PA-13 is also studied.The results show that:SBS and CR have a certain positive effect on the penetration and softening point of asphalt,but SBS has limited effect on the ductility of asphalt and CR has a negative effect on ductility,and both SBS and CR can increase the dynamic vis-cosity of asphalt;according to the performance,the dosages of SBS,CR and tackifier in high-viscosity modified asphalt are recommended to be 5.5％,14％and 3％respectively;the road performance re-sults of PA-13 show that the self-made high-viscosity modified asphalt could provide well high-and low-temperature and water stability for the mixture;in addition,compared with the related literature of high-viscosity asphalt,self-made high-viscosity asphalt has good performance.
NETL
NSTL
万方数据
