摘要
选用一种新型无缝伸缩缝专用胶结料,制作改性沥青填充式桥梁伸缩缝混合料与水泥混凝土梁端粘结复合小梁,应用直接拉伸试验方法,进行了界面粘结特性试验研究,分析了不同温度条件、不同界面特性对界面粘结性能的影响规律与失效状态,解释了失效原因.结果表明:(1)温度对粘结性能影响显著,温度升高,粘结强度逐渐减小,但不同温度区间递减规律不同,温度越高,递减越缓;(2)界面粗糙化处理对粘结性能具有改善作用,但不同温度条件下的改善效果不同,低温明显,高温甚微;(3)不同温度状态下,粘结失效特征不同,低温"脆裂",常温"扯裂",高温"粘裂".
Composite beam samples were made bonding with modified asphalt mixture and cement concrete by special asphalt binder of seamless expansion joint,and the bonding performances were studied by direct tensile tests.The influence rules and failed states under different temperatures and conditions of interface bonding were analyzed,and the bonding failure causes were explained.The results show that（1）temperature has great effects on bonding performance.bonding strength decreases with temperature rising,but the decreasing rules are different in different temperature range,when temperature higher,the decreasing speed slower;（2）rough interaction can improve bonding performance,but the improving effects are different under different temperature,low temperature＂prominent＂and high temperature＂indistinctive＂;（3）the characteristics of bonding failure are different under different temperature,＂brittle rupture＂under low temperature,＂divulsion＂under normal temperature,and ＂agglutinate rupture＂under high temperature.
出处
《武汉理工大学学报（交通科学与工程版）》
2014年第6期1256-1259,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金面上项目(批准号:51378438)
中央高校基本科研业务费专项资金项目(批准号:SWJTU12ZT05)资助
关键词
道路工程
改性沥青
试验研究
桥梁伸缩缝
粘结性能
road engineering
modified asphalt
experimental research
bridge expansion joint
bonding performance
