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EVS-EN 14038-2:2020

Electrochemical realkalization and chloride extraction treatments for reinforced concrete - Part 2: Chloride extraction

General information
Valid from 02.11.2020
Base Documents
EN 14038-2:2020
Directives or regulations
None
Standard history
Status
Date
Type
Name
02.11.2020
Main
03.03.2011
Main
This document specifies a procedure for carrying out impressed current electrochemical chloride extraction from chloride bearing concrete in existing structures. It is applicable to atmospherically exposed parts of structures with ordinary reinforcement and/ or post-tensioned tendon ducts embedded in concrete. In the latter case, it is essential to verify that there is no risk of hydrogen embrittlement, if necessary by conducting trials and installing monitoring during the treatment. This document does not apply to concrete containing pre-stressing steel, which can suffer hydrogen embrittlement during chloride extraction, or to concrete containing coated or galvanized reinforcement. In case of post-tensioned, pre-stressing concrete, the endangered tendon strands can be shielded by the tendon ducts from unwanted and/or exceeded polarization into the cathodic range and respective water reduction.
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