Research on the Application of SBS/Rubber Powder Composite Modified Asphalt in Highway Asphalt Pavement
SBS and rubber powder composite modified matrix asphalt can not only improve the perform-ance of modified asphalt,but also reduce the cost of SBS modified asphalt,which is economical and environ-mentally friendly.In this paper,based on a highway pavement engineering project,the production process and preparation of SBS/rubber powder composite modified asphalt,the road performance of composite modified as-phalt,and the design of mixture mix ratio are studied.The results show that by determining the mixing ratio of each raw material and adopting a reasonable production process,the prepared composite modified asphalt has excellent high and low temperature performance and good stability,and the key points of quality control in the production process of composite modification are summarized.Through the paving of the test road,it is shown that the designed middle surface layer of RAC-20 has good water tightness,rutting resistance and driving comfort.
rubber powdercompound modificationproduction processmix ratio designasphalt mix-turePerformance observations
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