环氧沥青混合料钢桥面铺装层裂缝类病害机理分析  

Analysis on failure mechanism of cracking distress on steel bridge deck epoxy asphalt overlay

作　　者：山宏宇 李倩 叶青[2] 秘林源 贾晓阳[3] 

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550001 [2]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550000 [3]田纳西大学,美国诺克思维尔37996

出　　处：《新型建筑材料》2017年第12期77-81,共5页New Building Materials

摘　　要：以贵州省坝陵河特大桥环氧沥青混合料钢桥面铺装层裂缝类病害为对象,采用凝胶渗透色谱(GPC)和傅里叶变换红外光谱(FTIR)从分子尺度对环氧沥青混合料钢桥面铺装层裂缝类病害产生机理进行分析。结果表明,由于钢桥面铺装层粘结层环氧沥青的固化反应不完全,造成了层间粘结能力的丧失,引发了自上向下的开裂,最终贯穿铺装结构形成块状裂缝或龟裂。The cracking distress on Balinghe steel bridge in Guizhou Province was investigated in this paper. Failure mechanism of cracking distress on steel bridge deck epoxy asphalt overlay was analyzed through ,Gel Permeable Chromatography （GPC） and Fourier Transform Infrared （FTIR） microscope at molecular dimension. Results indicated that the loss of bonding ability between layers were on account of incomplete chemical reaction of interlayer between epoxy asphalt layers. The crack generated from top to bottom,propagated downwards and formed block cracking and fracturing.

关 键 词：钢桥面铺装 环氧沥青 裂缝类病害 机理分析 

分 类 号：TU535[建筑科学—建筑技术科学]