Prefabricated tiles for external coverings ribbed at the lower part, made up at the surface of concrete or resin and at the underside of lightweight expanded polystyrene concrete. Machine and system for prefabrication. Finishing machine for fitting

摘要

The invention relates to the prefabrication of tiles for external coverings. These tiles are made up of 3 securely bonded layers: The first, so-called wearing layer, made of conventional materials a. The second made of lightweight expanded polystyrene concrete (density 700 kg/m<3>) for good strength b. The third made of lightweight concrete of lower density bearing ribs which allow the circulation of air and water and create support points c. The tiles are particularly adapted to heavy protection systems for the waterproofing of accessible terraces. They are light and make it possible to eliminate the support studs; the frost-resistant and insulating lightweight concrete increases the thermal insulation; in addition, they are very easily cut. They are manufactured upside down on slightly modified existing machines.