Blocks of wood agglomerate

Abstract

The invention relates to compressed blocks of wood agglomerate, comprising wood particles and a hydraulic binder, produced by a method in which an initial mixture comprising wood particles and a hydraulic binder is held under pressure for the duration of the hardening of the binder. The invention further relates to a method for production of said blocks and the use thereof in particular, as construction elements for buildings.

1 - 34 . (canceled) 
   
   
       35 . A block of compressed wood agglomerate, wherein said block comprises particles of wood and a hydraulic binder, and wherein said block is obtained by a process in which an initial mixture comprising particles of wood and a hydraulic binder is kept under pressure throughout the hardening period of the binder, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture. 
   
   
       36 . A block of compressed wood agglomerate, wherein said block comprises particles of wood and a hydraulic binder, is obtained by compression of an initial mixture comprising at least 75% of particles of wood, in volume of dry matter, and shows a density greater than approximately 500 kg/m 3 . 
   
   
       37 . The block of wood agglomerate as claimed in  claim 35 , wherein said block has a resistance to punching compression greater than 3 mPa. 
   
   
       38 . The block of wood agglomerate as claimed in  claim 35 , wherein the particles of wood comprise wood chips, optionally in a mixture with vegetable fibres, preferably thin wood chips, more preferably shavings made by the cutting tools of machine tools. 
   
   
       39 . The block of wood agglomerate as claimed in  claim 35 , wherein the binder is based on cement. 
   
   
       40 . The block of wood agglomerate as claimed in  claim 35 , wherein the binder is based on plaster. 
   
   
       41 . The block of wood agglomerate as claimed in  claim 35 , wherein the binder is based on lime. 
   
   
       42 . The block of wood agglomerate as claimed in  claim 35 , wherein said block is produced from a mixture comprising, for a total of 100% representing the volume of dry matter, from 75% to 95% approximately of particles of wood and from 5% to 25% approximately of hydraulic binder, and a quantity of water between 10% and 30% of the total volume of dry matter. 
   
   
       43 . The block of wood agglomerate as claimed in  claim 35 , wherein said block is produced from a mixture comprising, for a total of 100% representing the volume of dry matter, from 50% to 90% approximately of wood chips, from 5% to 25% approximately of fibre vegetable and from 5% to 25% approximately of hydraulic binder, and a quantity of water between 10% and 30% of the total volume of dry matter. 
   
   
       44 . The block of wood agglomerate as claimed in  claim 35 , wherein the mixture further contains one or more adjuvants for dyeing, acceleration or retarding of the hardening of the binder, waterproofing, fireproofing, fungicide or insecticide treatment, liquefaction of the mixture, faster hardening or to produce a high-performance mixture. 
   
   
       45 . The block of wood agglomerate as claimed in  claim 35 , wherein the mixture further contains reinforcing fibres of the block agglomerate. 
   
   
       46 . The block of wood agglomerate as claimed in  claim 35 , wherein said block shows a density greater than approximately 500 kg/m 3 , preferably greater than approximately 800 kg/m 3 . 
   
   
       47 . A process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens. 
   
   
       48 . The process as claims in  47 , wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the over ( 54 ) at a determined height ( 68 ). 
   
   
       49 . The process as claimed in  claim 48 , wherein the blocking means of the mould ( 50 ) comprise tabs ( 66 ) blocking the cover ( 54 ) by clipping. 
   
   
       50 . The process as claimed in  claim 48 , wherein lateral faces ( 58 ,  60 ) of the mould ( 50 ) open to disengage the cover ( 54 ), and in that pivoting means ( 72 ) and fixing means ( 74 ) assist in assembling these lateral faces ( 58 ,  60 ). 
   
   
       51 . The process as claimed in  claim 48 , wherein the mould comprises holes at its base. 
   
   
       52 . The process as claimed in  claim 48 , wherein the mixture is moulded in a mould ( 159 ) comprising a bottom ( 161 ) blocked by two lateral pivoting elements ( 167 ) which are keyed ( 169 ), a cover ( 160 ) serving as pressing, and in that the mould ( 159 ) comprises blocking means ( 165 ) of the cover ( 160 ) at a determined height ( 173 ). 
   
   
       53 . The process as claimed in  claim 52 , wherein the blocking means of the bottom ( 161 ) of the mould ( 159 ) comprise lateral pivoting elements ( 167 ) on an axis by hinges ( 168 ) and blockage of the latter by keyway ( 169 ). 
   
   
       54 . The process as claimed in  claim 52 , wherein the blocking means of the mould ( 159 ) comprises tabs ( 165 ) blocking the cover ( 160 ) by clipping. 
   
   
       55 . The process as claimed in  claim 52 , wherein the lateral pivoting elements ( 167 ) are loosened ( 169 ) releasing the bottom ( 161 ), the block ( 170 ) and the cover ( 160 ) after the binder has hardened. 
   
   
       56 . The process as claimed in  claim 52 , wherein the moulds ( 159 ) can be juxtaposed and assembled beside one another. 
   
   
       57 . The block of wood agglomerate as claimed in  claim 35  or obtainable by a process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens, wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the cover ( 54 ) at a determined height ( 68 ), wherein said block constitutes a partition element comprising on its periphery tongues ( 12 ) or grooves ( 14 ) to ensure binding with juxtaposed blocks. 
   
   
       58 . The block of wood agglomerate as claimed in  claim 57 , wherein the partition element is flat ( 10 ). 
   
   
       59 . The block of wood agglomerate as claimed in  claim 58 , wherein the flat partition element ( 10 ) comprises on one of its side edges slots ( 22 ) which nest with slots ( 22 ) of another flat element. 
   
   
       60 . The block of wood agglomerate as claimed in  claim 57 , wherein the partition element comprises two grooves ( 86 ) made on an edge of two opposite lateral faces. 
   
   
       61 . The block of wood agglomerate as claimed in  claim 57 , wherein the partition element is curved ( 110 ). 
   
   
       62 . The block of wood agglomerate as claimed in  claim 57 , wherein the partition element ( 38 ,  40 ,  120 ) comprises in its upper part a longitudinal channel ( 32 ) which continues other horizontally juxtaposed elements with the channel. 
   
   
       63 . The block of wood agglomerate as claimed in  claim 35  or obtainable by a process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens, wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the cover ( 54 ) at a determined height ( 68 ), wherein said block constitutes a long element ( 82 ) forming a hollow beam to be filled by a binder. 
   
   
       64 . The block of wood agglomerate as claimed in  claim 35  or obtainable by a process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens, wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the cover ( 54 ) at a determined height ( 68 ), wherein said block constitutes a long element forming a beam ( 100 ) comprising a longitudinal reinforcement inserted in the wood agglomerate ( 102 ). 
   
   
       65 . The block of wood agglomerate as claimed in  claim 35  or obtainable by a process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens, wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the cover ( 54 ) at a determined height ( 68 ), wherein said block constitutes a lengthy piece ( 130 ) of minimal thickness having a transversal section in an arc of a circle forming an arch. 
   
   
       66 . An upper ( 140 ) or lower ( 150 ) block of wood agglomerate as claimed in  claim 35 , wherein its contour comprises one are or arcs of a circle adjusting on an arched piece ( 130 ). 
   
   
       67 . The block of wood agglomerate as claimed in  claim 35  or obtainable by a process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens, wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the cover ( 54 ) at a determined height ( 68 ), and wherein said block constitutes a lengthy piece ( 175 ) with tenons ( 176 ) and notches ( 178 ) so that the blocks ( 130 ) adapt perpendicularly and at the end. 
   
   
       68 . A method of building a construction, the method comprising using a block of wood as claimed in  claim 35  or obtainable by a process for preparation of a block of wood agglomerate, comprising the steps consisting of forming or pouring in a mould ( 50 ) or ( 159 ) a mixture comprising particles of wood and a hydraulic binder hydrated by water, the particles of wood representing at least 75%, preferably from 75% to 95% approximately, of the total volume of dry matter of the initial mixture, then applying and maintaining the mixture under pressure while the binder hardens, wherein the mixture is moulded in a mould ( 50 ) comprising a cover ( 54 ) serving as pressing, and wherein the mould ( 50 ) comprises blocking means ( 66 ) of the cover ( 54 ) at a determined height ( 68 ), as a construction element.