Engineering Commons^™

Analytical Modeling Of The Interface Between Lightly Roughened Hollowcore Slabs And Cast-In-Place Concrete Topping, Aiham Adawi, Maged A. Youssef, Mohamed E. Meshaly

Civil and Environmental Engineering Publications

Hollowcore slabs are commonly used in different types of structures. They are usually topped with a 50 mm concrete topping. Structural engineers can use this topping to increase the slab load carrying capacity. North American design standards relate the horizontal shear strength at the interface between hollowcore slabs and the concrete topping to the slab surface roughness. This paper presents results of four push-off tests on hollowcore slabs supplied by two manufacturers and roughened using a conventional steel broom. The tested slabs sustained higher horizontal shear stresses than those specified by the design standards. Utilizing the data from the push-off …