Force Transfer using structural adhesive bonding between timber and UHPFCR: a push-out test to choose the adhesive

Abstract : The Navier laboratory has worked from many years on the development of composite timber-concrete structures to obtain new typologies of structures, technically and economically efficient, and having better environmental performance using structural adhesive bonding to ensure a almost-perfect connection between the two materials However, many doubts still exist concerning its possible use for this type of application concerning mainly the durability of the bonded assembly and its ability to transmit the forces concentrated on edges. The present study describes the development of a test called "Push-Out" used to characterize the behavior of the timber-concrete bonded assembly. Following the development of used test protocol, investigations are realized on three different commercial resins to study the influence of the adhesive stiffness on the force transfer focusing in particular on the failure mode, on the ultimate capacities and some local deformations. These various investigations conducted in parallel should finally allow choosing the most suitable adhesive for the intended use