桥面水泥混凝土含水率对防水层粘结性能的影响  

Influence of Moisture Content of Cement Concrete on Performance of Waterproof Adhesive Layer in Bridge Deck

作　　者：冯德成[1] 魏文鼎[1] 詹苏涛[1] 

机构地区：[1]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：《公路交通科技》2013年第5期47-51,共5页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(2011318801670)

摘　　要：依据表面能理论,采用柱状灯芯技术和躺滴法分别测定不同含水率时水泥混凝土与SBS沥青的表面能参数,并通过计算粘附功,分析了不同含水率时水泥混凝土与SBS沥青的粘附性。在此基础上,对水泥混凝土处于不同含水率时的层间粘结性能进行了验证。结果表明:在含水率为0%时粘附功最大;随着含水率增大,粘附功逐渐变小;随着含水率降低,防水粘结层抗剥离性能提高,当含水率降至0.5%后,层间粘结性能对含水率已不敏感;随着含水率的降低,抗剪强度增大,但当含水率降至1.0%后增加的幅度并不显著。Based on surface energy theory, the surface energy parameters of SBS asphalt and cement concrete with different moisture contents are measured by the column wicking technique and sessile drop method. Furthermore, the adhesion between cement concrete and SBS asphalt with different moisture contents is analyzed by calculating adhesion work. Then, the interlamination adhesive performance with different moisture contents is verified. The results indicate that （ 1 ） the adhesion work hit the maximum when moisture content is 0% , and the adhesion work decreases gradually as moisture content increases; （2） as moisture content decreases, the debond resistance performance of waterproof adhesive layer improves, when the moisture content is O. 5%, the interlamination adhesive performance is insensitive to moisture content; （3） as moisture content decreases, the shear strength of waterproof adhesive layer on bridge deck also improves, but the increment is not obvious after moisture content is under 1.0%.

关 键 词：桥梁工程 水泥混凝土含水率 粘附功 防水粘结层 桥面铺装 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]