Papers »

Chloride transport in repaired concrete structural elements

This paper/talk deals with the chloride transport in concrete elements in which the concrete cover was partially replaced with a repair material. Numerical calculations are used to establish criteria for the depth to which the concrete cover must be removed if the remaining layer of concrete is contaminated with chlorides. Compliance with these criteria is essential to prevent the residual chlorides causing depassivation of the reinforcing steel. The results of ongoing laboratory investigations demonstrate a favourable extraction of the chlorides present in the remaining concrete element by the repair layer. It is intended to use the results to develop a concept for evaluating the durability of concrete elements after repair with respect to chloride-induced corrosion of the reinforcing steel.

Author(s):

Christoph Gehlen    
TU Munich
Germany

Amir Rahimi    
Federal Waterways Engineering and Research Institute (BAW), Karlsruhe
Germany

Thorsten Reschke    
Federal Waterways Engineering and Research Institute (BAW), Karlsruhe
Germany

Andreas Westendarp    
Federal Waterways Engineering and Research Institute (BAW), Karlsruhe
Germany