11 Facts About Concrete slab

Concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete.

In many domestic and industrial buildings, a thick concrete slab supported on foundations or directly on the subsoil, is used to construct the ground floor.

Concrete slab has similar thermal properties to masonry products, in that it has a relatively high thermal mass and is a good conductor of heat.

Thermal conductivity of a concrete slab indicates the rate of heat transfer through the solid mass by conduction, usually in regard to heat transfer to or from the ground.

Concrete slab has a relatively high thermal mass, meaning that it takes a long time to respond to changes in ambient temperature.

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However, there are still uses for a Concrete slab that is not insulated, for example in outbuildings which are not heated or cooled to room temperature .

Common type of insulated slab is the beam and block system which is modified by replacing concrete blocks with expanded polystyrene blocks.

One-way Concrete slab has moment-resisting reinforcement only in its short axis, and is used when the moment in the long axis is negligible.

Calculation of reinforcement requirements for a one-way Concrete slab can be extremely tedious and time-consuming, and one can never be completely certain of the best design.

Non-reinforced Concrete slab is two-way if it is supported in both horizontal axes.

In some cases formwork is not necessary - for instance, a ground Concrete slab surrounded by brick or block foundation walls, where the walls act as the sides of the tray and hardcore acts as the base.