CORROSION INDUCED FAILURES IN PRESTRESSED CONCRETE STRUCTURES AND PREVENTATIVE MEASURES KORROSIONSBEDINGTE SCHÄDEN IN SPANNBETONKONSTRUK- TIONEN UND HIERAUS ABGELEITETE PRÄVENTIVMASSNAHMEN DOMMAGES EN CONSEQUENCE DE CORROSION DANS DES CONSTRUCTIONS EN BETON PRECONTRAINT ET DES MESURES PREVENTIVES
During the past 40 years in Germany some serious damages in postand pre-tensioned components have been occurred because of stress corrosion cracking of prestressing steel. Especially those problems caused a great stir, where the attendant circumstances of design, execution and building materials were not unusual. But the prestressing steel was unsuited to resist the inevitable conditions on construction site and inside the construction.
SPECIAL CORROSION PROBLEMS IN POST-TENSIONED STRUCTURES
Water in ungrouted ducts, which resulting from bleeding of fresh concrete, fulfils the best prerequisites for pitting and hydrogen induced stress corrosion. The report presents typical failures and discusses the circumstances of bleeding and fractures of prestressing steel. (A) For the covering abstract of the conference see IRRD 850834.
Spannungsrisskorrosion. Prüfung der Spannstähle im NH4 SCN-Versuch
Description de l'essai de corrosion fissurante sous tension au thiocyanate d'ammonium mis au point par la FIP. Resultats d'application de cet essai a differents types d'acier