This European Standard specifies a procedure for carrying out impressed current electrochemical realkalization (ER) of carbonated reinforced concrete in existing structures. It is applicable to atmospherically exposed parts of structures with ordinary reinforcement embedded in concrete.<\/p>\n
This European Standard 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.<\/p>\n
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.<\/p>\n<\/div>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | Contents Page <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 4 General 4.1 Quality management systems 4.2 Personnel 5 Principle <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 6 Assessment and repair of the structure 6.1 General 6.2 Review of records 6.3 Inspection 6.4 Carbonation depth measurement 6.4.1 General 6.4.2 Determination of chloride content <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 6.5 Concrete cover thickness and reinforcement location measurements 6.6 Alkali aggregate reaction 6.7 Reinforcement continuity and size 6.8 Repair 6.8.1 General 6.8.2 Concrete removal 6.8.3 Reinforcement preparation <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 7 Materials and apparatus 7.1 Calibration of instrumentation 7.2 Anode system 7.2.1 General 7.2.2 Anode 7.2.3 Anode zone 7.2.4 Alkaline electrolyte solution 7.3 Electric cables <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 7.4 Power supply 8 Installation procedures 8.1 Electrical continuity of reinforcement 8.2 Performance monitoring 8.3 Installation of anode system <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 8.4 Protection of electrolyte solution 8.5 Electrical installation 8.6 Preliminary testing and documentation 9 Commissioning, operation and termination of treatment 9.1 Visual inspection 9.2 Energizing and adjustment of current output 9.3 Routine inspection and maintenance <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 9.4 Realkalization process monitoring 9.5 Termination of treatment 10 Final report <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 11 Post-treatment coating and monitoring <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Electrochemical realkalization and chloride extraction treatments for reinforced concrete – Realkalization<\/b><\/p>\n |