盐度对Sasobit温拌沥青胶结料性能影响分析

Sasobit温拌排水沥青路面以其良好的环境效益和使用效果而受到越来越多的关注，但试验表明其低温和疲劳性能指标有所下降。为了提高其性能指标，采用掺加不同剂量（1%，3%，5%，7%）食盐于Sasobit高粘沥青中，通过室内试验模拟沥青路面使用过程中沥青的短、长期老化，并进行相应的流变性质试验、弯曲蠕变劲度试验以及布氏旋转粘度试验，试验结果表明：相比较原样髙粘沥青，Sasobit高粘沥青的车辙因子有较大幅度的提升，蠕变劲度有所下降；添加食盐的Sasobit高粘沥青的车辙因子略有降低，但蠕变劲度和疲劳因子随食盐掺加量的增加有先减后增的趋势；进一步的粘温曲线图表明最佳的食盐用量为沥青质量的5%。

Influence of Salinity on Performance of Sasobit Warm Asphalt

Sasobit warm mix drainage asphalt pavement has become increasingly popular due to its environmental benefits and using effects. However, test results show that its low temperature and anti-fatigue performance indica-tors have a certain decline. In this study, four different doses （1%, 3%, 5%, 7%） of salt were added to the Sasobit asphalt to improve the performance indicators. Laboratory tests were used to simulate short and long term aging as-phalt in the process of construction and pavement usage. A series of binder tests including bending beam rheome-ter （BBR）, dynamic shear rheometer （DSR） and Brookfield viscosity tests were conducted. Results show a slight de-crease of G＊/sinδfor Sasobit asphalt with salt and the creep stiffness and G＊/sinδpresent a tendency of declining first and then increasing with the increase of salt. The viscosity-temperature curve shows that the best content of salt is 5%.