1 School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2 China Merchants Zhixiang Road Technology (Chongqing) Co., Ltd., Chongqing 400060, China
3 China Merchants Chongqing Transportation Research and Design Institute Co., Ltd., Chongqing 400067, China
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文章历史+
Received
Published
Revised
2025-03-05
2026-01-18
2025-10-24
Online Date
2026-09-20
PDF (16251K)
摘要
为探究无剪力件联接作用下钢-超高性能混凝土(ultra-high performance concrete,UHPC)的层间黏结性能,分别选用了不同的防腐与防水黏结材料,通过测定不同温度与湿度环境下的层间黏结强度与剪切强度,利用熵权-TOPSIS方法优选出黏结材料的最佳适配组合。同时采用扫描电子显微镜(scanning electron microscope,SEM)对不同组合条件下的破坏界面进行微观分析。结果表明:不同组合结构均存在最佳适配类型;聚氨酯作为防水黏结层与不同防腐材料均具有良好的黏结强度,50 ℃条件下,黏结强度均大于9 MPa;随着潮湿程度的增加,环氧树脂与UHPC界面黏结强度逐渐降低,聚氨酯与水性环氧树脂则呈现出先增大后减小的变化趋势;钢板-水性有机类防腐漆-水性环氧树脂-UHPC为最适配结构,50 ℃剪切强度大于5.65 MPa;水分造成环氧树脂与聚氨酯界面黏结强度下降,而水性环氧树脂黏结剂形成的纤维网状结构增强了与UHPC界面联接。研究结果为进一步优化钢-UHPC界面黏结材料选择提供参考。
Abstract
To investigate the interlayer bonding performance of UHPC (steel-ultra-high performance concrete) under the action of shear free connection, different anti-corrosion and waterproof bonding materials were selected. By measuring the interlayer bonding strength and shear strength under different temperature and humidity environments, the optimal combination of bonding materials was selected using entropy weight-TOPSIS method. Simultaneously, SEM(scanning electron microscope) was used to conduct microscopic analysis of the failure interface under different combination conditions. The results show as follows. There is an optimal fit type for different combination structures. Polyurethane, as a waterproof bonding layer, has good bonding strength with different anti-corrosion materials. At 50 ℃, the bonding strength is greater than 9 MPa. As the degree of humidity increases, the bonding strength between epoxy resin and UHPC interface gradually decreases, while polyurethane and water-based epoxy resin show a trend of first increasing and then decreasing. Steel plate-waterborne organic anti-corrosion paint-waterborne epoxy resin-UHPC is the most suitable structure, with a shear strength greater than 5.65 MPa at 50 ℃; Moisture causes a decrease in the interfacial bonding strength between epoxy resin and polyurethane, while the fiber network structure formed by water-based epoxy resin binder enhances the interface connection with UHPC. The research results provide a reference for further optimizing the selection of steel UHPC interface bonding materials.
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