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当遭遇突变天气如低温冰雪时,路面材料长时间处于有水、低温冰冻状态及温度交替变化过程中,由于水分和温度共同作用引起的道路冻融损坏现象较为普遍。通过在室内模拟水温冻融环境,对多次冻融后的沥青混合料进行了间接拉伸类试验(劈裂试验),通过试验分析了水温冻融条件下沥青混合料的劈裂强度、冻融劈裂强度、劈裂疲劳性能的变化规律。结果表明,沥青混合料的强度、水稳定性、疲劳性能随反复冻融衰减明显。
When encountering catastrophic weather such as low temperature snow and ice, the pavement material is in water for a long time, and when the low temperature freezing state and the alternating temperature change, the road freezing and thawing damage caused by the combined effect of moisture and temperature is more common. By simulating the environment of freezing and thawing in the water environment, the indirect tensile test (split test) of the asphalt mixture after repeated freezing and thawing was carried out. The splitting strength and freezing resistance Melt splitting strength, splitting fatigue properties of the law. The results show that the strength, water stability and fatigue performance of asphalt mixture decay obviously with repeated freeze-thaw cycles.