This document specifies a procedure for carrying out impressed current electrochemical realkalization of carbonated reinforced concrete in existing structures. It is applicable to atmospherically exposed parts of structures with ordinary reinforcement embedded in concrete. This document does not apply to concrete containing prestressing steel which can suffer hydrogen embrittlement during realkalization, or to concrete containing epoxy-coated or galvanized reinforcement, or if chloride contamination is contributing to reinforcement corrosion. NOTE In case of post-tensioned prestressing concrete, the endangered tendon strands may be shielded by the tendon ducts from unwanted and/ or exceeded polarization into the cathodic range and respective water reduction. Justification The currently available TS 14038-1 is an important legal cornerstone for the application of non-destructive rehabilitation techniques in concrete maintenance. It addresses smaller structures than car parks (eg. facades, locally carbonation induced corrosion issues), where Cathodic Protection (as described in EN ISO 12696) appears to cause too much long-term effort. As other non-destructive rehabilitation methods the standard helps to preserve the environment by avoiding noisy and dusty concrete replacement.
Registration number (WIID)
39663
Scope
This document specifies a procedure for carrying out impressed current electrochemical realkalization of carbonated reinforced concrete in existing structures. It is applicable to atmospherically exposed parts of structures with ordinary reinforcement embedded in concrete. This document does not apply to concrete containing prestressing steel which can suffer hydrogen embrittlement during realkalization, or to concrete containing epoxy-coated or galvanized reinforcement, or if chloride contamination is contributing to reinforcement corrosion. NOTE In case of post-tensioned prestressing concrete, the endangered tendon strands may be shielded by the tendon ducts from unwanted and/ or exceeded polarization into the cathodic range and respective water reduction. Justification The currently available TS 14038-1 is an important legal cornerstone for the application of non-destructive rehabilitation techniques in concrete maintenance. It addresses smaller structures than car parks (eg. facades, locally carbonation induced corrosion issues), where Cathodic Protection (as described in EN ISO 12696) appears to cause too much long-term effort. As other non-destructive rehabilitation methods the standard helps to preserve the environment by avoiding noisy and dusty concrete replacement.
