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Development of a multi-ring resistivity cell and multi-electrode resistivity probe for investigation of cover concrete condition

机译:用于研究覆盖混凝土状况的多环电阻率池和多电极电阻率探头的开发

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摘要

Direct Current (DC) electrical resistivity is a material property well known to be sensitive to various aspects of concrete condition related to corrosion risk. This paper describes the development of a multi-ring electrical resistivity cell for the evaluation of concrete. A multi-electrode surface resistivity probe for on-site applications is also presented. The multi-ring resistivity cell is capable of assessing the homogeneity of the investigated specimen, which is an important requirement for obtaining representative bulk resistivity results. The multi-electrode surface probe is used for depth investigation of cover concrete to identify moisture and chloride gradients by means of electrical resistivity tomography (ERT). The paper focuses on the development of these two resistivity devices, and the numerical modelisation, calibration, validation and cross-correlation thereof. The development of the resistivity cell will enable future work to establish master curves relating DC-resistivity to parameters indicative of concrete condition (particularly water content, chloride content and porosity). The final aim is then to estimate these state parameters for in situ concrete by means of the combination of electromagnetic non-destructive evaluation (NDE) techniques such as Electrical Resistivity Tomography (ERT), capacitive method and Ground Penetrating Radar (GPR).
机译:直流(DC)电阻率是众所周知的一种材料特性,对与腐蚀风险有关的混凝土状况的各个方面敏感。本文介绍了一种用于评估混凝土的多环电阻率电池的开发。还介绍了一种用于现场应用的多电极表面电阻率探头。多环电阻率传感器能够评估所研究样品的均匀性,这对于获得代表性的体电阻率结果是重要的要求。多电极表面探针用于覆盖混凝土的深度研究,以通过电阻层析成像(ERT)识别水分和氯化物梯度。本文着重介绍这两种电阻率仪的开发及其数值建模,校准,验证和互相关。电阻率单元的发展将使未来的工作能够建立将直流电阻率与指示混凝土状况(特别是水含量,氯含量和孔隙率)的参数相关的主曲线。然后,最终目的是通过电磁无损评估(NDE)技术(例如电阻层析成像(ERT),电容性方法和探地雷达(GPR))的组合来估计现浇混凝土的这些状态参数。

著录项

  • 来源
    《NDT & E international》 |2013年第3期|27-36|共10页
  • 作者单位

    L'Universite de Nantes, Angers, Le Mans, IFSTTAR, MACS, F-44340, Bouguenais, France;

    L'Universite de Nantes, Angers, Le Mans, IFSTTAR, MACS, F-44340, Bouguenais, France;

    L'Universite de Nantes, Angers, Le Mans, IFSTTAR, MACS, F-44340, Bouguenais, France;

    L'Universite de Nantes, Angers, Le Mans, IFSTTAR, MACS, F-44340, Bouguenais, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Electrical resistivity; Corrosion; Chloride ingress; Non-destructive testing;

    机译:电阻率;腐蚀;氯化物进入;非破坏性测试;
  • 入库时间 2022-08-17 13:25:17

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