Using coffered formwork for ribbed floor slabs

The main motivating factor for the development of science in construction is the search for optimal types of structures that not only save time and money when using them, but also are not inferior in strength characteristics to analogues. In the construction industry, regardless of the direction, reducing the amount of consumables and the mass of structures being built is one of the main problems. At the moment, prestressed elements are being used to achieve this goal, the use of lightweight concretes is being introduced and new efficient structures are being used. One of the types of such are coffered ceilings.

Such overlaps are also called ribbed, partial-block or waffle, depending on the hollow shapes used. They are a ribbed structure with mutually perpendicular reinforced ribs. The use of a monolithic ribbed floor in comparison with flat slabs or a standard monolithic floor reduces the floor's own weight by up to 40%, reduces the use of concrete by up to 60%, by removing it from the lower stretched zone. At the same time, the rigidity of the plate itself increases. This allows you to arrange large spans without using additional supports up to 18 meters, which gives even more space.

Thus, the use of coffered ceilings has a number of serious advantages from an economic and technological point of view. This type of efficient construction has already been evaluated and is widely used in the USA and European countries for the construction of municipal buildings, shopping and entertainment, office and business centers, warehouses and industrial facilities. This method is convenient not only for the construction of new buildings, but also for the conversion and restoration of large volume buildings into multifunctional centers. In countries with increased seismic activity, the construction of housing stock using this technology is also gaining momentum.

Let's consider the process of manufacturing a coffered floor using reusable plastic formwork of the Lam Plastik cassette type.

The installation process begins with a flooring for the size of the caisson-forming molds, then these elements are easily installed in the design positions joint-to-joint with each other and a standard flat formwork. This easy process does not take much time. Next, it is necessary to connect the design reinforcement frame and install formwork panels along the perimeter of the floor. If necessary, a formwork lubricant can be used. Now you can start feeding the concrete mixture, for high-quality laying, the mixture vibrates.

 


Dismantling is carried out after the overlap reaches the required strength. This process is also simple and safe, and the molds are easily removed from the overlap. As a result, we get a lightweight reinforced concrete floor, which has not lost its strength. At the same time, we have increased the usable space under it, using a minimum of columns, and saved time and money on work and materials. In addition to all the above, it can be used for more than 100 filling cycles.

Due to its shape, it is very easy to store and transport. The material is resistant to high temperatures, humidity, building chemicals and environmental influences.
 

Cassette plastic formwork for coffered floor slabs Lam Plastik is produced in 78 different sizes, so it will allow you to implement projects of different directions.