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嵌入式化物传感器用于监测化物透到水泥砂中的化物
1School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China.
Sensors (Basel, Switzerland)
|April 13, 2024
概括
开发了一种使用银/银和/二氧化电极的新型复合固体化物传感器. 这种传感器可以准确,非破坏性地监测水泥中的离子,这对结构完整性至关重要.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 化物进入是混凝土结构中钢筋腐蚀的主要原因.
- 对离子的准确和现场监测对于结构健康评估至关重要.
- 现有的化物检测方法可能具有破坏性或耗时性.
研究的目的:
- 开发和描述一种复合固态化物传感器,用于非破坏性监测.
- 在各种环境中评估传感器的电化学性能.
- 评估传感器是否适用于早期预警混凝土结构恶化.
主要方法:
- 使用Ag/AgCl工作电极和Mn/MnO2参考电极制造复合传感器.
- 通过阳极极化 (0.5 mA/cm2,2.5 h) 来优化Ag/AgCl电极制备.
- 电化学性能测试 (稳定性,可重复性,灵敏性) 在和的Ca(OH) 2溶液和砂样本中.
主要成果:
- 优化的Ag/AgCl电极证明了对化物度的线性电位响应,具有良好的稳定性和可重复性.
- 激活的Mn/MnO2参考电极在60天后显示出稳定的电位.
- 复合传感器在溶液和砂中表现出高灵敏度 (51.1 mV/十年斜率) 和快速稳定 (<30 秒).
结论:
- 开发的复合材料传感器对于在水泥砂中离子的现场非破坏性监测是有效的.
- 传感器提供了对钢筋损坏的早期预警,有助于延长结构使用寿命.
- 这项技术为积极的结构性健康管理提供了一个有前途的解决方案.
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