What Is The U-BOOT?
The U-boot is a modular element made of recycled polypropylene formwork, useful for the realization of lightened structures in reinforced concrete cast at the work-site. The U-BOOT modules give a 21st century answer for the laying of slabs with mushroom pillars with the special characteristic of the mushrooms being part of the thickness of the slab. This new, lighter structure is achieved by enclosing the U-BOOT elements within the concrete cast. This lighter structure is made up of two flat layers, one on top of the other, separated and connected to each other by a grid of beams at right angles. Slabs built with U-BOOT modules can form the structural elements of various building systems, such as double floors, floors, rafts and so on, for both civil and industrial buildings. With its high inertia level, this building system makes it possible to build large-scale constructions with a distinct cost advantage compared to traditional building solutions and in direct competition with prefabricated structures.
Can the U-boot be used also for foundations?
It is highly suggested mainly to create foundations to lighten slabs and therefore using little concrete and developing the slabs in height.
Which advantages does U-boot offer?
The advantages are remarkable. First of all U-boot allows to realize bidirectional slabs with the elimination of the usual carrying beams. Moreover a smaller thickness regarding the prefabbricated solutions is sufficient, also in the case of spans of considerable lengths. But we cannot forget that there is a reduction of weights on the vertical structures and the foundations, that the time of execution are reduced, that the slabs have limited possibility of deformation and that we use exclusively recycled pvc.
How is the U-boot module designed?
We have equipped the modules with feet and straps. The feet hold the modules raised from the shuttering to permit the concrete to flow under the modules, while the straps serve the purpose of connecting the modules to each other and thus prevent the concrete from seperating the modules apart. With regards to authorised approval, we are making tests in the main Universities, so to have the supports in the methods of calculation and the approach with our customers.
Which advice can we give to the enterprises?
The first advice that we can give is to try to use U-boot, because the slabs are lighter, they weigh little on the vertical structures, have a greater speed of laying, can be reinforced in the upper and lower part with steelmash or single bars in the two directions and offers very well the economic advantages. The only precaution that we advise is to pay attention during the phase of the contrete laying, that it must be layed in cautious manner. A very fluid concrete can be used in the laying and even without vibrating, but one need to pay attension in laying the first concrete in the underlying space, in order to have the feet of the modules well barried in the concrete. At a second stage, when the concrete has begun to set (after 5-6 hours therefore), the laying can be continued.
U-Boot is used in all applications that require a structural plate together with the need to use less concrete and therefore for a lighter structure. U-Boot is the ideal solution for creating slabs with a large span and/or great load-bearing capacity: it is particularly suited for structures that require considerable open spaces, such as executive, commercial and industrial buildings as well as public, civil and residential structures. It makes it possible to more irregularly distribute the pillars, as beams do not need to be created. In the case of yards that are difficult to access or restructuring work, U-Boot, due to its stackability, modularity, lightness and manoeuvrability, can be used to make horizontal structures without the help of handling and hoisting equipment.
With U-Boot also foundation rafters can be created with a larger thickness with a reduced amount of concrete.
Among the various foundation types, rafts are one of the most well known. They are used above all in ground conditions with little bearing capacity, or with poor quality soil, large thicknesses must be used which increases the construction cost. Thanks to the use of U-Boot lightened rafts can be created with the same performance but at a considerably lower cost. Once drown in the concrete casting, U-Boot forms the structure just like two full slabs, with a variable thickness, connected by a perpendicular beam gridwork to form a bidirectional static honeycomb plate. For this concrete bed, the distribution of weights due to hight inertia is rationalised in order to permit maximum stiffness and lightness for the structure with a minimum amount of concrete, which makes it possible to eliminate, where possible, the foundation piles.