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A new generation of plasterboard

It caused a minor revolution in the plasterboard industry when in June 2004, the first plasterboard with four tapered edges was launched. Ideal for ceilings and high partition walls, it makes it possible to create large, flat surfaces free of imperfections. There is currently only one company mass-producing this type of product on a production line.

Easy to install and a perfect finish

The new board provides a real, aesthetic solution and easier installation which the market has been waiting for for so long. Before this, plasterboards only had two tapered edges. When they were installed, an overlap is always visible at the transversal joins. As a result, installers use various techniques to reduce the thickness, such as by raising the frames or removing the paper from the board.

The new board, with its four tapered edges, considerably simplifies the work of plasterboard installers and ensures a perfect finish. At the site, the installation time is reduced because installers no longer need to finish off the joins, reducing installation costs accordingly. The new boards are fixed onto standard frames, the tapered edges being clearly identified by pre-printed markings. When the plasterboard is screwed down, the join is sufficiently loaded to cover the band without creating a bulge. After painting or wallpapering, the joins are invisible to the naked eye, even under low-angled lighting. This provides the world of interior design with a major innovation.

An exclusive and patented technology

The industry has been waiting for this innovation for 80 years. Some thirty patents have been filed worldwide since 1922. However, none of them made it possible to mass-produce plasterboard sheets with four tapered edges on a production line.

Fly Ash

Fly ash is obtained as waste material in modern thermal stations where a mixture of air and powdered coal is burnt in place of lump coal. The ash that results from combustion resembles Portland cement in appearance. This material is used in the building industry as a partial substitute for cement or as an additive to cement and the sintered fly ash is used as lightweight aggregate for structural concrete and masonry units. Fly ash is also used for preparing cellular concrete.

The addition of fly ash to mass concrete work or ready mixed concrete plants imparts the following properties to the concrete: 1. Aggregate Reaction: The addition of fly-ash reduces the cement aggregate reaction.

2. Heat Evolution: There is low heat evolution when fly ash is used for the preparation of the concrete.

3. Permeability: The use of fly-ash greatly improves the watertightness of the concrete.

4. Placing and finishing: Fly-ash permits easier placing of concrete and finishing because of the improvement in plasticity and cohesiveness of the mixture.

5. Strength: The addition of fly-ash improves the strength of concrete. Fly-ash usually replaces 20 to 25% of cement by weight or volume. The strength of such mixture equals or exceeds at a later stage than the strength of the non fly-ash mixture because of the pozzolanic action of the fly-ash.

6. Water Requirement: It is found that the use of fly-ash results either in small reduction or no change in the quantity of mixing water required per cubic meter of concrete for a given consistency or slump.