Experiences in practice in the repair of concrete structures for car park constructions damaged by chloride induced corrosion investigations, possibilities of repair, experiences at several constructions

摘要

In chloride contaminated steel reinforced concrete structures there are several parameters which determine the risk of corrosion and the intensity of a chloride induced corrosion of the reinforcing steel. The content of chloride in the concrete is the most important parameter. Caused by the methods of repair and caused by the different situations of constructions it is unavoidable that areas with high concentrations of chloride may remain in the repaired steel reinforced concrete structures. Up to now there are no long term experiences available to give an answer to the question how different methods of repair have been successful in practice. Therefore we will report upon our experiences in different methods of repair in case of chloride induced corrosion of steel reinforced concrete car park structures. The repaired structures reported have been successful over a period of eight to fifteen years in practice. These car park structures are actually in use without any harm or restrictions.