Modification of aged asphalt by blending of bio-oil and activated crumb rubber
In order to improve the performance of recycled asphalt pavement(RAP),different dosages of activa-ted crumb rubber(ACR)and waste cooking oil(WCO)were added to aged asphalt,which was analyzed in terms of rheological properties and microscopic characteristics.The results show that WCO can not only be used as a rejuvenator to improve aged asphalt,but also as a solubilizer to fully dissolve the crumb rubber to enhance the overall performance of asphalt.Fluorescence microscopy(FM)analysis showed that moderate amount of WCO helps to improve the compatibility of crumb rubber in asphalt.The Fourier transform infrared spectrosco-py(FTIR)results indicate that the aged asphalt rejuvenation process is a physical co-mingling,while the crumb rubber modification process is accompanied by a small amount of chemical reaction.Finally,combining the rheological results and microstructure of modified recycled asphalt,the optimal dosages of WCO and ACR were recommended to be 10%and 18%,respectively.
万方数据
维普
