Behaviour of steel - ceramic waste concrete composite slab

Abstract

In recent years, steel concrete composite slab systems have started gaining attention in developing countries. One of the major advantages of such slab system is substantial reduction in dead load. If slab is made with light weight concrete using waste materials, it can further lead to sustainable and environment-friendly floor option. This paper presents experimental investigations on the load carrying capacity and failure behavior of steel-concrete composite slab using normal concrete and ceramic waste aggregate concrete. Experiments were performed on identical deck sections with two different concrete - normal concrete and concrete made with ceramic wastes as aggregate. Total eight simply supported slabs were tested under two point bending with varying shear span. Out of eight specimens, four specimens were made of normal concrete and other four specimens were prepared of ceramic waste aggregate concrete which were tested with shear span of 300 mm and 550 mm respectively. Load at first crack, failure load and deflection were measured in all the cases. Results indicate that both normal concrete and ceramic waste aggregate concrete composite slabs behaved in a similar way in terms of crack patterns, interface slip, load deflection curves and failure loads. Load carrying capacity were found slightly higher as 2.7% and 10.87% for longer and shorter shear specimens respectively in case of normal concrete slab as compared to ceramic waste aggregate concrete slab . The experimental moment capacities were compared with analytical predictions using Euro Code 4 recommendations and results indicated good agreement in all specimen. These ceramic waste aggregate concrete slabs were efficient, environment friendly and 8.5% lighter than normal concrete slabs.