In this paper,the effect of RAP content on the performance of recycled asphalt mixture was studied,and the RAP content was set to 10％,15％,20％,30％and 50％,respectively,and the Marshall test,freeze-thaw splitting strength test,low temperature bending test and rutting test were carried out.The results show that the increase of RAP content will significantly improve the bearing capacity,high temperature stability and water stability of the recycled asphalt mixture,and reduce the crack resistance under the low RAP content.When the RAP content increased to 50％,the properties of the recycled asphalt mixture were significantly reduced.Considering the performance of recycled asphalt mixture,the difficulty of on-site construction,the road performance of the material and the utilization rate of the old material,it is suggested that the optimal RAP content is 30％.
万方数据
维普
