Experimental and numerical study of electrochemical chloride removal from brick and concrete specimens

被引：51
作者：
Toumi, A. [1 ]
Francois, R. [1 ]
Alvarado, O. [1 ]
机构：
[1] Univ Toulouse 3, F-31062 Toulouse, France
来源：
CEMENT AND CONCRETE RESEARCH | 2007年 / 37卷 / 01期
关键词：
brick; concrete; diffusion; chloride; migration; modelling;
D O I：
10.1016/j.cemconres.2006.09.012
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The electrochemical technique for chloride extraction (desalination) was applied in galvanostatic mode to cylindrical brick and concrete specimens with a steel bar as reinforcement placed in the centre. The specimens were initially contaminated by immersion in a solution of 35 g/l NaCl. Based on the Nernst-Planck equations, a numerical model was developed considering the interactions between the various ionic species in the pore solution. The model makes it possible to predict the evolution of the chloride profile with time. The numerical and experimental results are compared and the model parameters discussed. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：54 / 62
页数：9
相关论文
共 22 条
[1]   MATHEMATICAL-MODELING OF ELECTROCHEMICAL CHLORIDE EXTRACTION FROM CONCRETE [J].
ANDRADE, C ;
DIEZ, JM ;
ALAMAN, A ;
ALONSO, C .
CEMENT AND CONCRETE RESEARCH, 1995, 25 (04) :727-740
[2]   EXPRESSION AND ANALYSIS OF PORE FLUIDS FROM HARDENED CEMENT PASTES AND MORTARS [J].
BARNEYBACK, RS ;
DIAMOND, S .
CEMENT AND CONCRETE RESEARCH, 1981, 11 (02) :279-285
[3]   Analysis of the protective efficiency of galvanizing against corrosion of reinforcements embedded in chloride contaminated concrete [J].
Bautista, A ;
Gonzalez, JA .
CEMENT AND CONCRETE RESEARCH, 1996, 26 (02) :215-224
[4]   Corrosion products of galvanized rebars embedded in chloride-contaminated concrete [J].
Belaïd, F ;
Arliguie, G ;
Francois, R .
CORROSION, 2000, 56 (09) :960-965
[5]  
BELAID F, 2001, ASCE J MAT CIVIL ENG, V13
[6]   TRANSPORTATION OF IONS THROUGH CEMENT-BASED MATERIALS .1. FUNDAMENTAL EQUATIONS AND BASIC MEASUREMENT TECHNIQUES [J].
CHATTERJI, S .
CEMENT AND CONCRETE RESEARCH, 1994, 24 (05) :907-912
[7]   THE ELECTROCHEMICAL REMOVAL OF CHLORIDES FROM REINFORCED-CONCRETE [J].
ELSENER, B ;
MOLINA, M ;
BOHNI, H .
CORROSION SCIENCE, 1993, 35 (5-8) :1563-1570
[8]   Migrating corrosion inhibitor blend for reinforced concrete:: Part 1 -: Prevention of corrosion [J].
Elsener, B ;
Büchler, M ;
Stalder, F ;
Böhni, H .
CORROSION, 1999, 55 (12) :1155-1163
[9]   Electrochemical chloride extraction (ECE) from steel-reinforced concrete specimens contaminated by "artificial" sea-water [J].
Fajardo, G ;
Escadeillas, G ;
Arliguie, G .
CORROSION SCIENCE, 2006, 48 (01) :110-125
[10]  
Francy O, 1998, THESIS
123