Abstract:The content of SBS is one of the important factors that determines the pavement performance of SBS modified asphalt. In order to resist the adulteration of modifiers in SBS modified asphalt on the market, through the research of literatures at home and abroad, the commonly used SBS content detected methods are described and summarized, including physical methods and chemical methods: infrared spectroscopy, fluorescence microscopy, gel permeation chromatography, thermogravimetric analysis, extraction separation, double bond titration, and potentiometric titration method. This paper systematically combs the basic principles of various methods and the problems in the experimental process, concludes that the chemical detection method is more accurate than the traditional physical methods. As SBS content is prone to influence by several factors, the content of modifier cannot be fully reflected by using a single detection method. A new cross-detection method is proposed based on the advantages of each method. Infrared spectroscopy is the most basic qualitative judgment. The chemical method is used to determine the modifier content, and finally all other interference factors are eliminated by other physical means.