聚氨酯类钢桥面铺装中防水粘结层抗剪性能研究  

Shear Resistance Performance of Waterproof Adhesive Layer of Polyurethane Steel Bridge Deck Pavement

作　　者：欧子蘅 范钟亓 代一诺 叶宇杰 吕欣芃 Ou Ziheng;Fan Zhongqi;Dai Yinuo;Ye Yujie;LüXinpeng(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;RoadMaint Co.,Ltd.,Beijing 100095,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]中公高科养护科技股份有限公司,北京100095

出　　处：《市政技术》2024年第3期18-27,共10页Journal of Municipal Technology

基　　金：国家自然科学基金项目(51978035,52278425)。

摘　　要：聚氨酯钢桥面铺装材料具有优异的综合路用性能,使用该材料有望解决传统沥青类钢桥面铺装材料在钢桥严苛的使用环境下耐久性差、使用寿命短等问题,但目前针对其适宜的防水粘结层材料的研究很少。因此,针对聚氨酯铺装层下的2种防水粘结层材料(聚氨酯胶粘剂、环氧树脂粘结剂)进行剪切强度试验,分析了结构的层间剪切性能在防水粘结剂涂覆量、防水粘结层材料、碎石撒布量和养生时间影响下的变化规律。研究结果表明,聚氨酯防水粘结层的抗剪切性能均显著优于环氧树脂防水粘结层,增加防水粘结剂的涂覆量可以增加界面的粘结面积,但防水粘结层过厚会导致抗剪强度在达到峰值后下降;防水粘结层在表干时成型的试件抗剪强度最好,未表干时最差;碎石撒布量也会影响防水粘结层的抗剪强度,故在满足施工条件的前提下,应尽量减小碎石撒布量。Polyurethane steel bridge deck pavement material has excellent comprehensive road performance,whose application is expected to solve the problems of poor durability and short service life of traditional asphalt steel bridge deck pavement material under the harsh environment of steel bridge.However,there is little research on the appropriate waterproof adhesive layer material.Therefore,under polyurethane paving layer,the shear strength test of two kinds of waterproof adhesive layer materials(polyurethane adhesive and epoxy resin adhesive)was carried out.The changing law of interlayer shear properties of the structure was analyzed under the influence of waterproof adhesive coating amount,layer material,gravel spreading amount and curing time.The results show that the shear resistance of the polyurethane waterproof adhesive layer is significantly better than that of the epoxy resin waterproof adhesive layer.That increasing the coating amount of waterproof adhesive layer can increase the bonding area of the interface.But too thick coating will cause decrease of the shear strength after the peak;The shear strength of the specimen with dry waterproof adhesive layer is the best and the one without dry is the worst;The gravel spreading amuont will also affect the shear strength of waterproof adhesive layer,so the amount should be reduced under the satisfying construction conditions.

关 键 词：聚氨酯 钢桥面铺装 防水粘结层 抗剪性能 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]