Title: Correlation of Electrical Conductivity, Compressive Strength, and Permeability of Repair Materials
Author(s): Boyu Wang and Rishi Gupta
Publication: Materials Journal
Appears on pages(s): 53-63
Keywords: compressive strength; correlation analysis; electrical resistivity; half-cell potential; permeability
In recent years, the construction industry has invested a lot of effort in increasing concrete safety and in extending the service life of structures. Several test methods such as water penetration, surface/ bulk electrical resistivity, rapid chloride permeability (RCP), and half-cell potential have been proposed to study concrete durability. This study establishes the relationship between multiple durability test methods in the context of concrete repair, which was rarely selected as the object for study. By means of experimental study, this study finds that surface resistivity has a linear relation to bulk resistivity and a polynomial relation to water permeability. No relationship can be established between concrete resistivity and compressive strength, though high-strength concrete tends to have a high resistivity. RCP test results do not correlate well with resistivity measurements, which requires further study to overcome its heating and binding effect when measurements are being taken.