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钢筋混凝土通电加速锈蚀行为可视化表征
作者:  史桂昀 董必钦   洪舒贤 
单位:(深圳大学土木工程学院 广东省滨海土木工程耐久性重点实验室 广东 深圳 518000) 
关键词:钢筋 通电加速锈蚀 X射线断层成像 锈蚀形貌 量化分析 
分类号:TU528
出版年,卷(期):页码:2018,46(8):1081-1086
DOI:
摘要:
采用微米级X射线计算机断层扫描技术(XCT)对砂浆试块内钢筋的通电加速锈蚀过程进行跟踪测试,建立了一套基于XCT技术来研究钢筋通电加速锈蚀的无损测试方法,实现了钢筋锈蚀过程中钢筋和锈蚀产物的形貌变化的三维可视化表征和锈蚀损失的量化参数确定。结果表明:在空间上,通电加速锈蚀使钢筋产生沿高度方向较为均匀的锈蚀;在时间上,通电初期前2 h为钢筋的脱钝起锈阶段,锈蚀速率明显低于理论通电锈蚀速率;而后锈蚀速率接近于Faraday定律估计的理    论值。
 
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参考文献:
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