Tag Archives: precast concrete construction

Are precast concrete structures better? How?

It’s a known fact that precast concrete structures produce superior buildings than standard forms of concrete structures. So, what makes Precast Concrete Construction so different than other forms of constructions? After all, the concrete does not know whether it is statically reinforced or pre-tensioned (pre-stressed)! Precast concrete is prepared and cured at a location other than the construction site. But what really distinguishes precast from in-situ is it’s stress and strain response to external (load induced) and internal (autogenously volumetric changes) effects. Precast elements are of a finite size and need to be joined to the other elements of the construction to form a complete structure.

Basically, concrete is a mixture of sand, gravel and other aggregates that are usually bound together by a water based binder. Modifying agents and additives are introduced to improve the characteristics of the concrete.

Precast Concrete Construction

Precast concrete is cast under factory controlled conditions and not erected on site until it is fully hardened. Just like in-situ concrete, precast concrete can be plain, reinforced or pre-stressed concrete.

The process becomes more ‘buildable’
With precast structures, the entire process becomes easy and more ‘buildable’. This is because, the construction sequence becomes more sensible and each part is pre-built to exactly fit into place. The overall construction is safe and    there is a sense of stability too. Further, skilled labor is used for the construction of buildings using precast concrete and hence the overall quality of work is superior.

Simply more cost effective
With precast structures, the building component cost per – structural capacity is comparable to other materials and the overall cost of construction including transport, fixing finishing, maintenance and repair are competitive. There is lowest standard deviation and hence quality and final finish is assured. This method uses factory engineered concrete and hence destructive load testing and non-destructive load testing assurances are given.

Fast to erect
The precast concrete manufacturing takes some time – even several weeks. But, once ready, it greatly speeds up the on-site construction work. Clear heights, floor zones and other statistics are accurately built and it greatly speeds up the entire process.

Above all, the intrinsic qualities of an industrial product, manufactured in a controlled environment with accurate methods are bound to be superior to standard concrete mixed onsite. In a factory controlled environment, advanced quality control methods are used and hence the final finish is far better than standard concrete mix. Well, the dimensional accuracy, properties of the hardened concrete and reinforcement can all be checked before inclusion in the structure and hence the final product is more robust.

On a final note, factory made products are independent of the weather conditions on the site and are processed separately from the construction work on site. That’s why they have fewer external dependencies and external factors that negatively impact their quality.

In a world where the need for speed and quality is a never ending quest, precast concrete adds real value to a construction project and offers just the right solution for building sustainable – futuristic structures!

Most Common Uses Of Precast Structures In Construction

Good quality control, speedy construction and economy are some of the factors that make precast constructions a very popular choice. With the growing development and expansion of towns and cities, there is an increasing need for faster construction timelines without any compromise on quality and any impact on the costs too. Precast construction is one method which can be trusted and has uniform quality. Concrete is cast into a reusable mould and then cured under factory controlled environment, and transported to the construction site to be assembled with the other elements.

Precast concrete is used extensively in building structures such as floors, roofs and claddings. Some form the basic elements of a building and some are used for aesthetic appeal and decorative purposes. Here are some of the most common uses of precast structures in construction.

Precast Companies in India

Use of precast concrete in frames

There are two main types of precast concrete building frames. The structural frame consists of slabs, beams and columns. These structural frames can be used to assemble entire offices, car parks as well as retail developments. The cross wall frame consists of floor slabs and solid walls. It is used for hotels, schools and hospitals.

Use of precast concrete for floors

Floors could be of different types such as a plank, hollow core, beam and block or double tee. Using the precast technology for floor construction ensures that the quality of each slab is maintained and the construction is fast. There is standardized cross section and the strength to weight ratio is exactly maintained. Since it is precast in a quality controlled environment, the finishing is good and surfaces look neat.

Use of precast concrete in cladding

Precast concrete cladding is used as a structural element. It can also be used as a non structural decorative façade. In this method, the backing concrete is made from an ordinary mix and the façade consists of a special mix. A great variety of forms and details can be casted and used for decoration. Some of the decorative precast application includes bridge beams, double Ts, hollow core slabs, pipe or culverts, foundation walls or architectural panels etc. Sometimes precast parts are used for aesthetic appeal too. Some examples are countertops, sinks and bathtubs, decorative rock features, decorative window sills, accent strips, statuary or paving stones etc.

The main advantage of the use of precast elements in this type of construction is its repeatability. It is very easy to make many copies of the same product. It is a very efficient way of creating exactly same elements from a mould and using them where repeated designs in a construction are necessary. When you use precast, you can control the quality of the final product by ensuring that each piece is built with great care and is perfect before it is transported to the construction site. The curing of the precast elements is also done in a factory by heating the precast parts and this greatly increases the strength of the structure.

KEF Infra is a leading Precast Construction Companies in India. Precast / Precast Concrete is the process of creating a construction product.