Cobiax presents technological optimisations for prefabricated concrete parts at the BAU 2017 in Hall A1, Booth 127.

The higher the degree of prefabrication at the plant, the lower the risk of assembly and execution errors under time pressure and in adverse construction site conditions.

As the degree of prefabrication increases, the costing reliability also increases and optimises the construction process, as fewer individual services and materials have to be organised and inspected during the construction process.

In particular the “Slim-Line” product line with its flattened plastic void former modules is predestined for use in prefabricated concrete plants for the production of semi-prefabricated and prefabricated parts.

What has proven its worth thousands of times during the production of in-situ concrete is becoming increasingly popular at prefabricated concrete plants due to the Cobiax product extensions and optimisations.

Through the use of the Cobiax technology in semi-prefabricated parts and prefabricated parts, the prefabricated concrete industry is able to expand its areas of application and sales possibilities.

In addition, the use of these plastic void former modules means that prefabricated concrete manufacturers can follow the trend of offering more effective and more efficient products, primarily then when building certification acc. DGNB, LEED or BREEAM is desired.

To date, Cobiax can look back on approximately 10 million m² of finished voided flat slabs used across the globe, so that this patented technology used to optimise flat reinforced concrete constructions in terms of weight and material consumption can be designated as an accepted construction method, in particular as a technical approval has been issued for both product lines ─ “Eco-Line” and “Slim-Line”.

The Cobiax technology is based on the creation of enclosed voids inside a reinforced concrete area or slab.

By using these enclosed plastic void formers made of recycling materials, concrete can be replaced where it is not structurally necessary.

This patented system can also be used by prefabricated concrete plants to optimise their semiprefabricated and prefabricated parts in structural, economic and ecological terms, so that they can develop new applications and open up new markets.

Optimisation through reduction Under identical fringe conditions such as concrete quality, deformation limits, additional load, traffic load and span, a “Cobiax voided flat slab” is up to 10% thinner than a completely solid reinforced concrete slab.

Furthermore, the statically-required flexural reinforcement can be reduced by up to 15%. At the same time, the slab dead weight is reduced by up to 35%.

With an identical dead weight, it is possible to produce a Cobiax voided slab with an up to 40% larger span in comparison to a completely solid reinforced concrete slab.

Convincing practical examples from reinforced concrete prefabricated part production Cobiax is able to refer to a series of practical examples which clearly show how simple the production of semi-prefabricated parts and also of prefabricated parts actually is, and above all how efficient and practical is their further use on the construction site.

The Cobiax technology can be applied for prefabricated and semi-prefabricated slabs, for staircase landings, for balcony slabs, prefabricated walls and shafts.

The combination of the Cobiax void former technology with the production know-how from the prefabricated concrete plants offers further advantages such as for example the possibility for subsequent opening up of building sections, and the integration of building technology necessities such as cables, empty conduits, installations and recesses.