Study on Two-stage Mixing Technology for Warm Mix Asphalt Mixture
Based on the method for central composite design and the pavement performance test on asphalt mixture,the two-stage mixing technology of warm mix asphalt was studied.Some important technological parameters under the mode of two-stage mixing,such as the factors influencing the mixing quality,the design and verified mixing temperature,the premixing amount of asphalt,the time of premixing,and the time of mixing in the second stage,were obtained.The result of pavement performance test shows that there appear obvious increases on high-temperature stability,low-temperature crack resistance and water stability of warm mix asphalt mixture.
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