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应用动态贯入度(高温疲劳)和四点弯曲疲劳试验(中温疲劳)两种疲劳试验方法,评价了3种改性沥青:岩沥青改性沥青、湖沥青改性沥青和聚合物改性沥青对浇筑式沥青混凝土的高温和中温疲劳性能影响。研究结果建议:在高温、重载交通路段中使用岩沥青改性沥青浇筑式沥青混凝土;在结构物柔性较大的路段应采用聚合物改性沥青浇筑式沥青混凝土。
Three kinds of modified asphalt were evaluated by two kinds of fatigue tests, dynamic penetration (high temperature fatigue) and four-point bending fatigue (medium temperature fatigue): rock asphalt modified asphalt, lake modified asphalt and polymer modified asphalt Effect of pouring asphalt concrete on high temperature and medium temperature fatigue properties. The research results suggest that rock asphalt modified asphalt pouring asphalt concrete should be used in high temperature and heavy traffic sections and polymer modified asphalt pouring asphalt concrete should be used in sections with large structure flexibility.