Title: The Rehabilitation Method of Electrochemical Chloride Extraction by an Engineering View

Author(s): E. Monteiro, P. Helene, and A. Carneiro

Publication: Symposium Paper

Volume: 229

Issue:

Appears on pages(s): 109-120

Keywords: chloride ions; corrosion; electrochemical chloride extraction; reinforced concrete

DOI: 10.14359/14731

Date: 9/1/2005

Abstract:
This present work presents a electrochemical chloride extraction in concrete containing chlorides. The main variables in the tests were water/cement and concrete cover, which are variables easily controlled by civil engineers. Chloride penetration in the test specimens was carried out in two distinct ways, namely in a salt spray chamber and through semi cycles of drying and partial immersion. The influence of concrete cover and water/cement on the efficiency of electrochemical method was assessed by determining the initial and the final chloride contents. The test results confirm that this method extracted chloride ions successfully. On average, this method removed 77% to 91% of the content initial chloride at a distance of 0.5 cm from the surface, and 50% to 79% of the content initial chloride near the rebars.