Abstract
In this paper, the mix ratio of SBS/waste rubber powder composite modified asphalt was designed. The dosage of rubber powder (60 mesh) was determined to be 15%, and SBS modifier (linear) was 2%. Based on the optimum mix ratio of asphalt mixture, the road performance of composite modified asphalt was tested and the composite modified ultra-thin wear layer was designed. The noise reduction characteristics of the overlay structure were studied by using the impedance tube instrument, it is found that the composite modified rubber asphalt ultra-thin overlay structure has advantages in reducing the intermediate-frequency and high-frequency noise.
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