Abstract: “The behavior of one way composite pre-slabs were studied. An experimental program was carried out to test nine simply supported slabs, one of them was reference monolithic slab and the remaining eight slabs were composite pre-slabs composed of two concrete layers. The composite preslabs were divided into three groups to investigate the effect of shear connectors length and ratio, and interface roughness on the behavior of pre-slabs. Also a theoretical analysis was carried out to confirm the experimental program. It was concluded from these experiments that increasing of shear connectors length or ratio led to increase horizontal shear capacity. Also, the interface roughness had a pronounced effect on the horizontal shear capacity of the composite pre-slab”

Keywords: Concrete, Shear Connectors, Pre-slabs, shear transfer, Interface roughness