ABSTRACT
The behavior of interfaces created between existing and added concrete when applying intervention techniques, strongly affects the efficiency of the intervention in terms of stiffness, bearing and deformation capacity. To contribute to the investigation of key parameters related to those interfaces, the current work focuses on cases where the available thickness of the concrete members is limited, thus allowing for small embedment depths for the dowels. Previously performed tests on interfaces reinforced with reinforcing bars or industrial steel screws have shown that a very short embedment depth in the added concrete may ensure substantial interface resistance, thus suggesting that they might offer a solution in case of thin concrete overlays added to existing members. The results of tests performed with the purpose of exploring the behavior of interfaces with limited thickness of the added concrete, where the anchorage conditions of the connectors are unfavorable, are presented herein.
