Permanent void former for lightweight bidirectional slabs
NEW NAUTILUS EVO is the modular formwork made of recycled polypropylene (PP) designed to lighten reinforced concrete slabs poured on-site.
The concept is to recreate a classic bidirectional slab designed to produce large spans and reduced thickness.
The presence of plastic lightning allows to obtain a cable structure without casting. In this way it is possible to realize decks with large spans and flat intrados, lightened and able to withstand important loads, with a reduction in consumption of concrete evaluable up to 25-30%.
Beams and pulvinus can be placed within the slab section (thickness elements) in order to realize wide slabs with a high architectural flexibility and without structure obligations.
NEW NAUTILUS EVO system is created with recycled materials, easy and fast to place in the construction site and sustains all the structure.
How much concrete can be saved compared to a ceiling slab solution?
When calculating a plate made with NEW NAUTILUS EVO, the parameter defining its thickness and governing its sizing is the deformation, which is a function of the inertia of the concrete + steel section. By replacing part of the concrete with the empties of the NEW NAUTILUS EVO formworks, the inertia will tend to reduce, but the lightness compensates for this loss as the weight reduction is greater than the reduction in flexural inertia. In general, however, weight reduction and therefore consumption of concrete varies between 20 and 30%.
How much steel can be saved compared to a ceiling slab solution?
The overall reduction in load depends on the extent of permanent and variable loads, as well as from the lightening ratio of the plate to the full load. This reduction varies between 5 and 15%. On average, steel savings on floors are around 10%. This savings should be added to the reduction of seismic stresses, the reduction in foundation load and the lower stress of vertical structures under static load.