The concrete slab may be a prefabricated one or an on-site one. In precast slabs, the slabs are usually built in factories and taken to the site where they are lowered to their place between concrete beams and steel. It also might be prestressed in the factory or post stressed at the site. However, the significant disadvantages of this slab are that if you do not find the right dimension; it will not fit. Yet, in the case of situ construction, the concrete slab is generally built on the site of the building with a box where the wet concrete is poured
A concrete slab is a common and essential element in building modern homes. This is because it is a shallow and reinforced concrete structure, and it is more extensive in comparison with its depth. The thicker slabs are used in the construction of floors, bridges decks as well as ceilings.
On the other hand, the thinner concrete slabs in the Hills district are used for exterior paving. A thick concrete slab on the subsoil or domestic and industrial foundations building is used in building ground floor buildings. A thing concrete slab is used as a slug between frames made of steel to make the ceiling and the floors in tall buildings and skyscrapers.
Different types of concrete slabs are available in the Hill district is a two-way slab and flat plate slab. The one-way slab, its support lines of the four sides and it has a broader span in a single course than the other. While four sides support the two-way slab while the reinforcing steel is perpendicular to all sides. When a slab is supported directly on the columns but lacks the support of beams, it is called s flat slab. Thus a flat slab is more beneficial because it involves a simple structure of a framework and it offers better fire protection
Thermal Performance :
There are two primary thermal considerations; one is the insulation of the floor slab and the high thermal mass. In a building made according to the old systems; the slabs are likely to consume heat from the room while casting directly on the ground. In a modern building, the concrete slab has underfloor heating pipes. This makes the slabs be cast above the expanded polystyrene insulation layer. A non-insulated slab is commonly used in outbuildings that cannot be cooled or heated to room temperature.
Here the slab is cast directly to a substrate, and this prevents overheating and freezing through retained room temperature.
Overall, the high thermal mass is usually applied on the walls, floor, and all areas where concrete is used. However, it is a disadvantage in cases where the rooms are heated quickly since the concrete slab takes time before warming up. Thus this delays the warming of the building. However, it is of great benefit in places where temperature swings occur since the slabs will act as regulators and help in keeping the building warm both at night and during the day.
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