After metal recovery,printed circuit boards still have a large number of non-metallic materials such as glass fiber and epoxy resin,which are added to AC-20 modified asphalt mixture.The influence of replacing 1％SBS modifier with non-metallic powder for printed circuit boards on road performance of SBS modified asphalt mixture is explored.The test results show that compared with 4％SBS modified asphalt mixture,the high temperature rutting and dynamic modu-lus of 1％SBS asphalt mixture replaced by 25％waste PCBN powder are increased by 8.8％and 11.02％,respectively,which has a good high temperature rutting resistance.The flexural tensile strength and maximum flexural tensile strain are reduced by 22.78％and 13.02％respectively,and the low temperature performance is reduced,and the water stability meets the specification requirements.SBS modified asphalt mixed with waste PCBN powder has good applicability in the hot and rainy areas in the south,which provides a reference for its engineering application in the field of highway,and pro-motes the green level of highway traffic construction in our country.
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