Effect of Different Electrode Numbers on the Image Quality of Concrete Damage in Electrical Resistance Tomography

5th International Conference on Environmental Science and Civil Engineering

生态环境科学;土木建筑工程

Sun, Shidong^1 ; Qin, Lei^1 ; Ren, Hongwei^2

School of Civil Engineering and Architecture, University of Jinan, Jinan

250022, China^1

School of Electrical Engineering, University of Jinan, Jinan

250022, China^2

关键词: Electrical permittivity;    Electrical resistance tomography;    Electrical resistance tomography systems;    Embedded electrodes;    Non destructive testing;    Quality of concrete;    Reconstructed image;    Watercement (w/c) ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/283/1/012005/pdf
DOI  :  10.1088/1755-1315/283/1/012005

来源: IOP

【 摘 要 】

Electrical resistance tomography (ERT) method [1] is proposed to visually investigated of the defect in concrete. It is an imaging modality in which the electrical permittivity distribution within an object is reconstructed based on measured resistance between electrodes attached on the object's surface. It is assumed that the spatial resolution of the reconstructed images with an electrical resistance tomography system can be consummated by electrodes. In this paper, specimens with one precast defect are made with 0.5 water-cement (w/c) ratio and detected using the embedded electrodes. The results show that different electrode numbers is the significant factor influencing the image quality of concrete damage in electrical resistance tomography. For the multi-defect detecting, the influence of electrical soft field effect cannot be neglected. In addition, the experimental results also show that ERT technology has the potential of concrete defect detection and on-site monitoring.