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对沥青混凝土桥面铺装病害的调查发现,铺装层的病害主要表现为变形类和裂缝类。结合桥面铺装病害的特点,要求沥青混合料铺装材料具有较好的抗疲劳性能、较强的黏结性能和较好的抗剪切性能。同时结合国内外的现状,对橡胶粉改性沥青SMA进行性能比较,试验结果证明,提出的橡胶粉改性沥青具有很好的性能,能够满足桥面铺装层的要求。
Investigation of the disease of pavement of asphalt concrete bridge deck found that the diseases of pavement layer are mainly deformation and cracks. Combined with the characteristics of the deck pavement disease, asphalt mixture pavement materials require good anti-fatigue properties, strong bonding performance and good shear resistance. At the same time, according to the current situation at home and abroad, the performance of rubber powder modified asphalt SMA is compared. The experimental results show that the proposed rubber powder modified asphalt has good performance and can meet the requirements of the deck pavement.