The bond behaviour in reinforced concrete, state of the art

Abstract

In the paper the results of recent studies of the reinforcement bars-cement matrix bond are presented, in order to clarify some important issues and to provide the state of the art of this subject. Different kinds of bond were discussed and the factors influencing each of them were described in details. The concrete properties is governing the bond behaviour and since bond failure can occur by tensile and shearing of the concrete, the strength of this composite is considered to be the decisive factor. Simultaneously, the significant effect on the bond strength of the concrete confinement is clearly shown in several studies. On the basis of recent studies discussion, the authors came to the conclusion of the necessity of the standard tests introduction, which will help to make further progress in the understanding of this bond behaviour.