A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
On the effectiveness of realkalisation as a rehabilitation method for corroded reinforced concrete structures
Reinforced concrete structures have frequently been promoted as constructions of unlimited service life and minimal maintenance requirements. However, under especially unfavourable conditions, these claims are unrealistic as some corrosion factors can depassivate concrete-embedded steel at rates resulting in severe damage after only a few years. Based on available experience with the use of electrochemical realkalisation (ERA), a fairly recent method for rehabilitating reinforced concrete structures (RCS), carbonated concrete can indoubtedly be realkalised. To the authors' minds, however, the following questions remain unanswered: (a) does ERA always effectively repassivates reinforcements?; (b) can ERA be considered an end or just a means to ensuring RCS durability?; and (c) what is the use of ERA if it cannot stop corrosion?. The work was aimed at answering the previous, controversial questions. To this aim, the behaviour in a Ca(OH)2 saturated solution, and in a sound uncarbonated mortar consisting of 1:3:0.5 cement, sand and water, of reinforcing bars from an RCS that failed through carbonation after 29 years of service life was examined.
On the effectiveness of realkalisation as a rehabilitation method for corroded reinforced concrete structures
Reinforced concrete structures have frequently been promoted as constructions of unlimited service life and minimal maintenance requirements. However, under especially unfavourable conditions, these claims are unrealistic as some corrosion factors can depassivate concrete-embedded steel at rates resulting in severe damage after only a few years. Based on available experience with the use of electrochemical realkalisation (ERA), a fairly recent method for rehabilitating reinforced concrete structures (RCS), carbonated concrete can indoubtedly be realkalised. To the authors' minds, however, the following questions remain unanswered: (a) does ERA always effectively repassivates reinforcements?; (b) can ERA be considered an end or just a means to ensuring RCS durability?; and (c) what is the use of ERA if it cannot stop corrosion?. The work was aimed at answering the previous, controversial questions. To this aim, the behaviour in a Ca(OH)2 saturated solution, and in a sound uncarbonated mortar consisting of 1:3:0.5 cement, sand and water, of reinforcing bars from an RCS that failed through carbonation after 29 years of service life was examined.
On the effectiveness of realkalisation as a rehabilitation method for corroded reinforced concrete structures
Zur Wirksamkeit der Realkalisierung als Instandsetzungsmaßnahme für korrodierte Stahlbetonbauwerke
Gonzalez, J.A. (author) / Cobo, A. (author) / Gonzalez, M.N. (author) / Otero, E. (author)
Materials and Corrosion ; 51 ; 97-103
2000
7 Seiten, 9 Bilder, 22 Quellen
Article (Journal)
English
Stahlbeton , Stahlbetonbau , Zement , Calciumhydroxid , Carbonat , Alkalisierung , aktiver Korrosionsschutz , elektrochemisches Verfahren , Reparatur , Polarisationskurve , Passivierung , Korrosionsgeschwindigkeit , Scheinwiderstandsmessung , pH-Wert , Lebensdauer , Korrosionsprüfung , Bewehrungsstahl
| British Library Online Contents | 2000
Electrochemical realkalisation for rehabilitation of reinforced concrete structures
| British Library Online Contents | 1995
Electrochemical realkalisation for rehabilitation of reinforced concrete structures
| Tema Archive | 1995
Realkalisation of reinforced concrete structures
| British Library Online Contents | 2005
MAINTENANCE AND REHABILITATION OF REINFORCED CONCRETE SLABS USING REALKALISATION TREATMENT
| British Library Conference Proceedings | 2010