Print Email Facebook Twitter Electro active repair of concrete: Innovation for increased repair durability Title Electro active repair of concrete: Innovation for increased repair durability Author Polder, R.B. Geiker, M.R. Publication year 2017 Abstract Many repairs of chloride induced corrosion in practice fail within 10 years due to chloride remaining after cleaning the steel, causing corrosion re-activation. An improvement of conventional repair was invented, Electro Active Repair, that electrochemically removes chlorides. After concrete removal, a temporary electrolyte and anode are installed and direct current is applied for 24 hours. Subsequently repair is as usual. Patents have been applied. Laboratory testing confirmed the principle. A cementitious material was placed between NaOH and FeCl2 solutions. More than 90% of the chloride was removed from the catholyte (FeCl2) in 20 hours at 8 A/m2 and the pH increased from 3 to 12. This will suppress re-activation of corrosion and improve the durability of the repair. The method fits in the conventional repair process. The additional cost is moderate. Applying the invention increases repair life and reduces life cycle cost of corrosion affected structures. Subject Fluid & Solid MechanicsSR - Structural ReliabilityTS - Technical SciencesBuildings and InfrastructuresArchitecture and BuildingUrbanisation To reference this document use: http://resolver.tudelft.nl/uuid:256a2b44-ac58-459f-89d9-f68e94a93dd3 TNO identifier 574981 Publisher Taylor & Francis Group ISBN 9781138028470 Source Life-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure, 1-8 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.