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为了确定再生沥青混合料的最佳拌和温度和压实温度,首先通过SGC试验在不同温度下成型混合料试件,根据试件的体积参数确定再生混合料最佳压实温度,然后根据再生沥青在合适剪切速率下的黏温曲线确定再生沥青混合料的最佳拌和温度。试验结果证明:对于再生基质沥青混合料,试验确定的最佳压实温度及拌和温度接近由黏温曲线计算所得温度值;对于再生改性沥青混合料,其施工特性与新拌混合料有明显差异,由试验确定的最佳压实温度及拌和温度低于黏温曲线所得的温度,建议实际工程中确定再生改性沥青混合料压实温度及拌和温度时,可在再生沥青黏温曲线试验的基础上适当降低5～10℃。
In order to determine the best mixing temperature and compaction temperature of reclaimed asphalt mixture, firstly, the mixture sample is formed by SGC test at different temperatures, the optimal compaction temperature of the reclaimed mixture is determined according to the volume parameter of the sample, The viscosity-temperature curve at the appropriate shear rate determines the optimum mixing temperature for the recycled asphalt mixture. The test results show that for the recycled matrix asphalt mixture, the optimum compaction temperature and mixing temperature determined by the experiment are close to the temperature values calculated from the viscosity-temperature curve; for the modified asphalt mixture, the construction characteristics are obviously compared with the fresh mixture Difference, the best compaction temperature and mixing temperature determined by the experiment are lower than the temperature obtained from the viscosity-temperature curve. It is suggested that when the compaction temperature and the mixing temperature of the regenerated modified asphalt mixture are determined in the actual project, Based on the appropriate reduction of 5 ~ 10 ℃.