Panel in particular for raised flooring and a process for manufacturing said panel

Abstract

It is disclosed a panel in particular for raised flooring, of the type comprising one concrete layer ( 7 ) having cement ( 8 ), inert material ( 9 ), and additives ( 10 a , 10 b ) as its components, the panel ( 1 ) comprising a micro-reinforcement made of fibers ( 11 ) resisting to tensile stresses, the inert material ( 9 ) consisting of granules having diversified sizes to limit the presence of gaps between the granules, and the components being compacted together at high pressure to reduce the porosity of the concrete layer ( 7 ).

1 . A panel in particular for raised flooring, of the type comprising at least one concrete layer ( 7 ) having at least cement ( 8 ), inert material ( 9 ), and additives ( 10   a ,  10   b ) as its components, said panel comprising a micro-reinforcement made of fibers ( 11 ) resisting to tensile stresses, and said inert material ( 9 ) consisting of granules having diversified sizes to limit the presence of gaps between said granules and to reduce the porosity of said concrete layer ( 7 ).  
     
     
         2 . A panel as claimed in  claim 1 , wherein said fibers ( 11 ) are a glass yarn of the alkaline-resistant (AR) type.  
     
     
         3 . A panel as claimed in  claim 1 , wherein said fibers ( 11 ) are a compound including glass yarns of the alkaline-resistant (AR) type and synthetic fibers of plastic material.  
     
     
         4 . A panel as claimed in  claim 1 , wherein said fibers ( 11 ) are in an amount of at least two percent of the weight of said concrete layer.  
     
     
         5 . A panel as claimed in  claim 1 , wherein said inert material ( 9 ) comprises a big aggregate ( 9   a ), a medium aggregate ( 9   b ) having smaller sizes than those of said big aggregate ( 9   a ) and substantially defined by sand, and a thin aggregate ( 9   c ) having smaller sizes than those of said medium aggregate ( 9   b ) and in an amount by weight similar to or greater than that of said medium aggregate ( 9   b ).  
     
     
         6 . A panel as claimed in  claim 5 , wherein said big aggregate ( 9   a ) includes granules having sizes included between ten and two millimeters, said medium aggregate ( 9   b ) includes granules having sizes included between one millimeter and half a millimeter, and said thin aggregate ( 9   c ) includes granules having sizes included between five hundredths and one hundredth of a millimeter.  
     
     
         7 . A panel as claimed in  claim 5 , wherein, with respect to the weight of said concrete layer ( 7 ), said big aggregate ( 9   a ) is in an amount substantially included between twenty and thirty-five percent, said medium aggregate ( 9   b ) is in an amount substantially included between ten and twenty percent, and said thin aggregate ( 9   c ) is in an amount substantially included between fifteen and twenty-five percent.  
     
     
         8 . A panel as claimed in  claim 6 , wherein in said concrete layer ( 7 ) a grit ( 11   a ) is provided, said grit ( 11   a ) being made of granules of glass of the alkaline-resistant type (AR) having smaller sizes than those of said medium aggregate ( 9   b ).  
     
     
         9 . A panel as claimed in  claim 8 , wherein said grit ( 11   a ) includes granules having a size substantially included between two tenths and four tenths of a millimeter.  
     
     
         10 . A panel as claimed in  claim 1 , wherein said components of said concrete layer ( 7 ) are under compacting conditions as determined by pressures of at least five hundred metric tons per square meter.  
     
     
         11 . A panel as claimed in  claim 1 , comprising an upper layer ( 14 ) of a material selected at least from ceramic grés, antacid resins, PVC, wood, and ecological coating including titanium oxide TiO 2 , said upper layer ( 14 ) defining a face in sight ( 1   a ) of said panel ( 1 ).  
     
     
         12 . A panel as claimed in  claim 11 , wherein said upper layer ( 14 ) is integral with said concrete layer ( 7 ) by gluing and pressing, to define a single manufactured article with said concrete layer ( 7 ).  
     
     
         13 . A panel as claimed in  claim 11 , wherein said upper layer ( 14 ) and concrete layer ( 7 ) jointly define side edges ( 1   b ) transverse to said face in sight ( 1   a ) and ground.  
     
     
         14 . A process for manufacturing a panel in particular for raised flooring, of the type comprising at least one concrete layer ( 7 ) having at least cement ( 8 ), inert material ( 9 ), and additives ( 10   a ,  10   b ) as its components, said inert material ( 9 ) being selected from granules having diversified sizes to limit the presence of gaps between said granules, and said components being bound to each other through a micro-reinforcement made of fibers ( 11 ) resisting to tensile stresses, and being compacted with each other at high pressure through a pressing step ( 20 ) to reduce porosity of said concrete layer ( 7 ).  
     
     
         15 . A process as claimed in  claim 14 , wherein in said pressing step ( 20 ) said components are submitted to pressures of at least 500 metric tons per square meter, in a mould ( 12 ).  
     
     
         16 . A process as claimed in  claim 14 , wherein said pressing step ( 20 ) is performed in combination with a vibration of said mould ( 12 ).  
     
     
         17 . A process as claimed in  claim 14 , wherein said inert material ( 9 ) is selected from at least three sizes differentiated from each other and in amounts by weight similar to each other, a medium aggregate being substantially defined by sand.  
     
     
         18 . A process as claimed in  claim 14 , wherein said concrete layer ( 7 ) is engaged in an irremovable manner with an upper layer ( 14 ) by gluing and mutual pressing.  
     
     
         19 . A process as claimed in  claim 18 , wherein said concrete layer ( 7 ) and upper layer ( 14 ) are jointly submitted to a grinding step ( 21 ) to define their size features.