Pannello di tamponamento prefabbricato in calcestruzzo armato con rete bilanciata in fibra di carbonio

The recent effect of the new technical standards – D.M. 14/01/2008, has led to a significant revision of the Italian approach to its precast building systems. Even more significant is the revision of the concrete panels with thermal break, which are increasingly popular after the publication of the decrees D.Lgs. 192/05, D.Lgs. 311/06, D.P.R. 59/09. In this contex, Ruredil S.p.A. has developed and patented a construction system that uses a balanced net of carbon fiber as reinforcement of external slab, therefore achievable thinness, to the benefit of weight, of resulting seismic actions, of insulating capacity whith the same overall thickness of the panel. The inserts used for the realization of the thermal break, and then for the hanging and connecting the external brought slab by the inner layer structure, are of the type standard version, but it was necessary to resolve issues related to the connection of these inserts whith a small slab thickness. In the article the authors describe the system and the project, give an account of experiments carried out on the real panels, of techniques and production problems, of the tests performed on prototypes in the laboratoryof the Faculty of Architecture of the IUAV University in Venice, under the guard of professor Angelo Di Tommaso. Under the structural profile, the studied and performed panel consist of an internal inner layer, insulated by sintered expanded polystyrene, characterized by a very small thickness slab, armed with a balanced net of carbon fiber, and by a careful study in order to reduce the size of the structural ribs, made possible thanks to less weight of the article, up to halff that of traditional panels, also aimed to maximize the proportion of insulation in the total area of the panel; the brought slab, external to insulating layer which constitutes the thermal break, has the same caractheristics as that of the inner layer. The so realized panel results easily developing and allows major cost savings while maintaining all the characteristics of durability, carrying capacity, workability and finishing that characterize the concrete panels. Lightness, leading to a consequent reduction of the seismic actions, also allows for economies in the structures and foundations. The panel is also to have characteristics of eco-compatibility, as it involves a general reduction in use of equipment and a reduction of transport, with consequent reductions in energy consumption and atmospheric emissions associated with production of raw materials and components for transport.