ABSTRACT
In separation cracks in RC elements (e. g. park decks), a short-term chloride exposure can already cause reinforcement corrosion. It is questionable, if a deep injection of the crack as an exclusive procedure is sufficient for effectively stopping the corrosion process. The crack repair methods for cracks, including the injection, are currently extremely discussed in Germany. But most available experiences derive from constructions in practice and thus, they always have various boundary conditions So there is no scientific work available at the moment, in which specific repair methods are investigated in a scientific way, for confirming or rebutting the thesis and/or assumptions among experts in practice based on quantitative research results. So in this paper, the methods and results of the investigations at RWTH Aachen University are summarized and should provide a first step in the quantitative evaluation of the crack repair problems.
