Title:
Challenges and Advances in Understanding the Electrical Properties of Concrete
Author(s):
Moe Pourghaz
Publication:
Web Session
Volume:
ws_F24_Pourghaz.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
11/3/2024
Abstract:
The electrical properties of concrete have been studied for over three decades. Today, the research community has a solid understanding of these properties and their interpretation. To encourage the widespread application of electrical property measurements, the focus has largely shifted to measuring resistivity, often at a single AC frequency. To relate resistivity to the fundamental transport properties of concrete, formation factor calculations are used to account for the conductivity of the pore solution and infer microstructure evolution. These approaches have proven satisfactory, with resistivity measurements now considered a surrogate for transport measurements, supported by both theoretical and experimental evidence. However, there is still a lack of comprehensive theoretical analysis and experimental data on the correlation between electrical resistivity and chloride diffusion, as the latter is fundamentally a different transport mechanism than permeability.