Investigation of shear transfer between vibrated and self-consolidating concrete in precast reinforced concrete constructions

Abstract

This paper deals with a basic study in shear force transmission about the joints of normal strength concrete by using small specimens with shear reinforcement. Thereby different combinations of concrete types (SCC and VC) and shear reinforcements were investigated. Additionally different ratios of normal and shear stresses in the joint between two different types of concrete were analyzed. Regarding the shear reinforcement selected angles (between the joint and reinforcement) as well as two different bar diameters (5 and 9 mm) were considered. The cubic compressive strength of the concrete used is ranged between 38 and 44 MPa. Altogether about 100 specimens were investigated. The mixture design of using SCC is based on a combination type. The major outcome of this study is that SCC has a higher adhesion resistance compared to vibrated concrete. This resulted in a better load bearing capacity. Shear-friction will be mainly influenced by the inclination of the shear reinforcement. This study confirm that the inclination of shear reinforcement in direction to the applied force improve the residual resistance after the slip.