Determination of Mixing Temperature of Dry-method SBS Modified Asphalt Mixture Based on Actual Road Performance
When producing dry SBS modified asphalt mixture,mixing temperature is one of the key process parameters.The theoretical mixing temperature of dry SBS modified asphalt mixture was obtained by fitting the viscosity temperature curve of the binder in the article,and the melting characteristics of the dry SBS modifier were considered.The minimum mixing temperature was obtained through dry mixing tests of coarse aggregates.Based on this,the performance verification of dry SBS modified asphalt mixture under different temperature conditions is carried out in the article.The results show that when the mixing temperature exceeds 175℃,the increase in road performance of the mixture tends to be small.Based on comprehensive performance and energy consumption,175℃is recommended as the optimal mixing temperature.The difference between the temperature and the fitting result of the viscosity temperature curve is 10℃,indicating that the method of determi-ning the construction temperature based on the modified asphalt viscosity temperature curve is no longer applicable.It is recommended to deter-mine the optimal mixing temperature based on the actual road performance
Road engineeringThe SBS for direct-to-plantMixing temperatureAsphalt
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