改性沥青伸缩缝结合料与混合料低温性能研究  

Research on low temperature performance of modified asphalt and mixture of bridge expansion joints

作　　者：于天来[1] 唐涛[1] 吴思刚[2] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040 [2]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《中国公路学报》2005年第2期18-23,共6页China Journal of Highway and Transport

摘　　要：为改善改性沥青桥梁伸缩缝材料的低温性能,使其在寒冷地区中小跨径桥梁上获得成功应用,通过添加热塑性橡胶类改性剂和橡胶类改性剂,对美佳改性沥青结合料进行二次改性,并通过对改性前后结合料和混合料低温性能的试验对比分析,重点研究了伸缩缝用改性沥青结合料和混合料的低温性能,通过实桥伸缩缝验证了研究成果的可行性。结果表明:该研究成果可在-40°C以上地区的中小跨径桥梁伸缩缝中使用。In order to improve the low temperature performance of modified asphalt and mixture of bridge expansion joints, and put it into use successfully in small and middle span bridges expansion joints in low temperature areas, authors modify the MEIJIA materials by adding thermoplastic elastomer and rubber. Through analysis or on the low temperature performance of modified and unmodified asphalt and mixture of bridge expansion joint, authors emphasize on the study of low temperature performance. The feasibility has been proved by the field bridge expansion joint. The result indicates that the materials can be applied in small and middle span bridges expansion joints in low temperature areas above -40°C.

关 键 词：道路工程 改性沥青 试验研究 桥梁伸缩缝 低温性能 

分 类 号：U414.1[交通运输工程—道路与铁道工程]