Title:
Model for corrosion initiation and propagation based on the resistivity
Author(s):
Carmen Andrade
Publication:
Symposium Paper
Volume:
366
Issue:
Appears on pages(s):
156-169
Keywords:
model, service-lie, corrosion, initiation, propagation, resistivity
DOI:
Date:
10/1/2025
Abstract:
Concrete is an efficient material in terms of mechanical strength and functionality, but whose durability is one of present challenges that need particular attention to preserve the reinforcement absent of
corrosion during the nominal service life. Present trends on modelling by performance make more complex the quality control testing and lengthens the characterization of new low carbon cement concretes. In present work is presented concrete resistivity as the single parameter able to characterize both corrosion periods through the corresponding mathematical expressions. Resistivity is a non-destructive test which could qualify concrete from its early ages. Based in the relation between diffusivity-corrosion current and resistivity, an integral model based
in the resistivity measured at short term in the same specimens than mechanical strength (cured humid), is described. It is also analysed the analogies between the diffusivity and corrosion current and the influence of climate in the resistivity for future challenge of predicting the impact of climatic change.