Abstract
This paper presents the applicability of fracture control design concepts to the repair strategy for crack injection repair in concrete structures. The mechanical behavior including crack patterns depended on the properties of injection materials. The stiffness of the repaired specimen with un-injected parts became lower than that of original one. Most repair strategies for crack injection repairs involve the injection materials each having good bonding, high strength etc. These good materials, however, gave new cracks in the bulk concrete because of higher strength of injections and its interfaces. It was also discussed that the material selection based on the fracture control design concepts might be important for the maintenance of concrete structures.
