Electrochemical chloride extraction to repair combined carbonated and chloride contaminated reinforced concrete

Abstract

Electrochemical chloride extraction to repair combined carbonated and chloride contaminated reinforced concrete Yolaine Tissier (1-4) , Véronique Bouteiller (1,*) , Elisabeth Marie Victoire (2,3) , Suzanne Joiret (4) , Thierry Chaussadent (5) and YunYun Tong (1-4, +)

Analytical and Numerical Investigation of an Electrochemical Chloride Barrier for Reinforced Concrete Structures

“…To date, various research works have focused on the question of electrochemical chloride extraction (ECE) [4][5][6]. In these studies, simulations have also been used in order to investigate the effect of chloride movement through concrete; however, in comparison with this work, major differences exist [7][8][9]-firstly, for electrochemical chloride extraction, much higher voltages are common and lower voltage ranges are not usually examined.…”

Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor

“…In agreement with the diagram of Tuuti [9], one of the main goals consists in slowing down the chloride diffusion inside the matrix in order to delay the onset of the corrosion process. Several alternative strategies have been proposed for increasing the durability of reinforced concrete structures exposed to chloride-rich environments such as coatings [10,11], cathodic protection [12,13], chloride extraction [14], and use of corrosion inhibitors [15][16][17][18][19]. Among these, the use of corrosion inhibitors (CI) is one of the most effective and cheaper ways to prevent the chloride-induced corrosion of reinforced concrete structures.…”

Efficiency of Different Electrolytes on Electrochemical Chloride Extraction to Recover Concrete Structures under Chloride Induced Corrosion

“…Figure 1 shows a schematic representation of the mechanisms and chemical reactions involved on ECE. The degree of chloride extraction is frequently measured by grinding the concrete cover and it is mostly known to vary from 30 to 60% of removed chlorides depending on innumerous variables [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The setup to perform ECE has many particularities that can significantly affect its efficiency [7,[15][16][17].…”

“…The degree of chloride extraction is frequently measured by grinding the concrete cover and it is mostly known to vary from 30 to 60% of removed chlorides depending on innumerous variables [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The setup to perform ECE has many particularities that can significantly affect its efficiency [7,[15][16][17]. Three major variables play an important role during the chloride removal process: the direct current, the electrolyte solution and the external anode, therefore the choice over them is of great importance and guidelines suggest some options, different from each other [19][20][21].…”