摘要
研究了除冰盐种类、温度和浸泡时间等因素对AH-70沥青和SBS改性沥青两种混合料性能影响。结果表明:除冰盐可以增加沥青混合料的拉伸破坏强度和常规劈裂强度,但混合料的断裂能降低;在冻融循环的条件下,除冰盐会明显降低沥青混合料的劈裂强度;在60℃高温条件下,在除冰盐饱和溶液中浸泡的沥青混合料马歇尔残留稳定度会降低,其中CH3CO2K对残留稳定度影响最大,其次为CaCl2;另外,采用SBS改性沥青在一定程度上可以减小除冰盐对沥青混合料性能的影响。
Effects of deicers types, temperature and soak time on the asphalt mixture with AH-70 and SBS modified asphalt are studied. The results indicate that the deicers can increase the tension strength. But the fracture energy of asphalt mixture decreased. The intension strength of asphalt mixture is decreased remarkably after freeze-thaw cycle in saturated deicers solution. The deicers can decrease the Marshall stability of asphalt mixture and the effects of CH3CO2 K on the stability are larger than others. In addition, the influence of deicers on properties is decreased when SBS modified asphalt is employed to prepared asphalt mixture.
出处
《公路》
北大核心
2011年第6期180-184,共5页
Highway
基金
中央高校基本科研业务费专项资金
项目编号CHD2009JC133
关键词
沥青混合料
除冰盐
断裂能
稳定度
冻融循环
asphalt mixture
deicer
fracture energy
stability
freeze-thaw cycle
