Efficiency investigations of electrochemical realkalisation treatment applied to carbonated reinforced concrete - Part 1: Sacrificial anode process - Sorbonne Université Access content directly
Journal Articles Cement and Concrete Research Year : 2012

Efficiency investigations of electrochemical realkalisation treatment applied to carbonated reinforced concrete - Part 1: Sacrificial anode process

Abstract

The aim of this study was to assess the efficiency of a realkalisation treatment using sacrificial anodes applied to reinforced concrete degraded by carbonation. Analytical determinations (acid/base indicators, quantitative pH, alkaline profiles, SEM and micro-Raman) together with electrochemical characterizations (rest potential, impedance, linear polarisation resistance and corrosion current densities) were performed on artificially carbonated slabs, before and after treatment (mainly 15 days, 11 weeks, 6 and 12 months). The treatment efficiency was demonstrated by an increase of pH and by an alkaline ion penetration in the concrete cover. Rest potential and corrosion current densities indicated a slight decrease of the rebar corrosion activity. Complementary Raman spectroscopy showed a change in the oxide species and SEM observations indicated that the cement matrix remained almost unchanged. (C) 2011 Elsevier Ltd. All rights reserved.

Dates and versions

hal-00777200 , version 1 (17-01-2013)

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Cite

Tong Yun Yun, Bouteiller Véronique, Marie-Victoire Elisabeth, Suzanne Joiret. Efficiency investigations of electrochemical realkalisation treatment applied to carbonated reinforced concrete - Part 1: Sacrificial anode process. Cement and Concrete Research, 2012, 42 (1), pp.84-94. ⟨10.1016/j.cemconres.2011.08.008⟩. ⟨hal-00777200⟩
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