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应用马歇尔试验法对添加不同Sasobit剂量的普通AC-13C型沥青混合料进行了体积参数分析,以Sasobit沥青混合料的空隙率达到普通沥青混合料的空隙率(4.5%)为控制指标,以Sasobit沥青混合料稳定度相对于普通沥青混合料稳定度提高幅度最大为辅助指标,确定了Sasobit沥青混合料的最佳击实温度为130℃和最佳Sasobit剂量为3%。利用车辙试验、低温小梁试验、冻融劈裂试验和浸水马歇尔试验对加入3%Sasobit的沥青混合料以及同级配普通沥青混合料的性能进行了对比测试,研究了Sasobit对沥青混合料路用性能的影响。分析结果表明:相对于普通沥青混合料,Sasobit沥青混合料的击实温度虽然降低了20℃,但高温稳定性却有明显提高,动稳定度是普通沥青混合料的3倍;Sasobit沥青混合料的低温抗裂性与水稳定性低于普通沥青混合料,但下降幅度不明显。
The volume parameters of common AC-13C asphalt mixture with different doses of Sasobit were analyzed by Marshall test. Taking the void ratio of common asphalt mixture (4.5%) of Sasobit asphalt mixture as the control index and Sasobit The stability of asphalt mixture relative to ordinary asphalt mixture to improve the stability of the largest auxiliary indicators to determine the optimum compaction temperature of Sasobit asphalt mixture was 130 ℃ and the best Sasobit dose of 3%. Rutting test, low temperature trabecular test, freeze-thaw splitting test and immersion Marshall test were used to test the performance of asphalt mixture with 3% Sasobit and the same grade with normal asphalt mixture. The effects of Sasobit on asphalt mixture road With the impact of performance. The analysis results show that although the compaction temperature of Sasobit asphalt mixture is reduced by 20 ℃ compared with common asphalt mixture, the stability at high temperature is obviously improved with the dynamic stability being 3 times that of common asphalt mixture; The low temperature crack resistance and water stability are lower than ordinary asphalt mixture, but the decrease is not obvious.