WO2012062769A1 - Copeaux de bois minéralisés - Google Patents

Copeaux de bois minéralisés Download PDF

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Publication number
WO2012062769A1
WO2012062769A1 PCT/EP2011/069671 EP2011069671W WO2012062769A1 WO 2012062769 A1 WO2012062769 A1 WO 2012062769A1 EP 2011069671 W EP2011069671 W EP 2011069671W WO 2012062769 A1 WO2012062769 A1 WO 2012062769A1
Authority
WO
WIPO (PCT)
Prior art keywords
mineral
aggregate
wood
binder
chips
Prior art date
Application number
PCT/EP2011/069671
Other languages
German (de)
English (en)
Inventor
Robert Kuhnhenn
Original Assignee
Robert Kuhnhenn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Kuhnhenn filed Critical Robert Kuhnhenn
Publication of WO2012062769A1 publication Critical patent/WO2012062769A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/18—Waste materials; Refuse organic
    • C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
    • C04B18/28—Mineralising; Compositions therefor
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10—Coating or impregnating
    • C04B20/1055—Coating or impregnating with inorganic materials
    • C04B20/1077—Cements, e.g. waterglass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to an aggregate consisting of wood chips with a coating of a mineral binder, and the use of this additive and a process for its preparation.
  • aggregates are generally understood to mean natural or artificially produced aggregates (such as expanded clay), which are used for the production of hydraulically bound building materials (eg concretes).
  • aggregates At bulk densities of not more than 2000 kg / m 3 or bulk densities of not more than 1200 kg / m 3 one speaks of lightweight aggregates and the European standard DIN EN 13055-1 applies.
  • renewable raw materials To protect the natural resources, it is particularly advantageous to use renewable raw materials as building material in the form of aggregates.
  • the quality of the building material must not suffer from the use of renewable raw materials, but the building material must be generally and extensively processed and processed on the market and can be offered inexpensively.
  • wood chips which are either obtained as a waste product in woodworking or specifically obtained from logs.
  • unprocessed wood chips like wood, have the disadvantage that they are susceptible to pest and mold infestation.
  • An improvement of the biocidal properties of wood chips can u. a. be achieved by a protective sheath.
  • the strength (compressive strength) of a mineral-bonded component with mineral-coated wood chips as aggregate is significantly higher than in conventional wood concretes produced with untreated wood shavings as aggregate.
  • the increase in strength will be up to 50 percent, but varies slightly upwards or downwards with respect to the chosen mixture constituents.
  • Untreated organic aggregates such as wood chips are not designed for structural applications.
  • the exclusion takes into account the fact that organic aggregates in the alkaline environment of the hardening concrete are not inert. Already in low concentration lead, occurring in almost all organic supplements sugar, to considerable hydration problems to complete inhibition of the hydration processes.
  • the mineralization of wood chips described in this application effectively addresses the above limitations.
  • the mineralization significantly increases the aggregate grain density of the aggregate and thus leads to an increased aggregate efficiency.
  • the sugars found in the wood chips were already dissolved during the mineralization process, so that the inhibiting effect of the mineralized chips is much lower than with untreated shavings.
  • organic aggregates through the mineralization become an attractive aggregate in the construction industry.
  • a process for the production of wood concrete is known, by which both a mineralization and a biocidal impregnation of the wood chips to be achieved.
  • an additive consisting of alkaline earth oxides or alkaline earth metal hydroxides is mixed to form a hydraulic binder and this mixture is used to encase the individual chipboard.
  • formic acid or formates of the alkali metal or alkaline earth metal elements and of ammonium are proposed as the mineralizing agent for such a coating.
  • preservation and mineralization of the wood chips is achieved by adding activated sulfur to a mixture of wood-concrete, wherein the activation of the sulfur is achieved by the use of metal oxides and metal hydroxides as well as acidic salts.
  • a similar aggregate is also known from US 1 762 267 A, in which individual pieces of wood are surrounded by a coat of gypsum, lime or cement.
  • the admixture requires further substances with hydrophobic properties.
  • EP 0 735 162 A discloses the strengthening of plant fibers by a metal compound in combination with an inorganic or organic binder.
  • WO 93/09943 A discloses an aggregate of lignocellulose with a core of a wood chip and a double coating of kaolin.
  • WO 2007/124727 A2 describes a lignocellulosic aggregate of wood, shives and / or straw plant particles, which are provided with a hardened mineral binder are coated.
  • the binder consists of dolomitic lime and / or cement.
  • the aim of the above-mentioned method is to avoid a renewed water absorption of the lignocellulosic additive.
  • water repellents are applied to the surface of the sheath.
  • the lignocellulosic core of each individual element is provided with a salt load. By using salts, however, there is a considerable risk of corrosion.
  • the salts used are chlorides, so that released in a concrete with the appropriate aggregate chlorides and thereby embedded reinforcing steels, pipes and all metallic materials can be attacked. If soaked, the chlorides would be dissolved and could additionally attack neighboring components. In the construction industry it is known that a variety of building damage can be attributed to chloride pollution.
  • the object of the present invention is therefore to provide a mineralized wood chip as an additive, without the use of materials that can later cause damage as a construction material when used as a building material and thus can be safely used in all concrete applications.
  • the sheathing of the wood chips next to the hardened mineral mineral binder contains more mineral fines, wherein at least 50%, preferably 85%, of these further mineral fines have a predominant particle size of 0.05 to 0.7 pm, preferably 0.06 to 0, 15 pm.
  • these particles are about 100 times smaller than the particles of a conventional mineral binder (eg cement CEM I 42/5 with an average particle size of 16 pm).
  • the fineness of the particles allows a completely closed sheath which causes an increased adhesion between the wood cell wall and the mineral sheath in the individual shavings, which can not be achieved with pure binder due to the coarser grain size in this quality.
  • the proportion of mineral fines is between 0.5 and 2 wt .-%, preferably between 0.5 and 1, 5 wt .-% and particularly preferably at about 1, 3 wt .-% based on the total weight of the fixed surcharge (consisting of Wood chips, mineral binder and mineral fines) or between 1 and 6 wt .-% based on the mineral binder amount.
  • the fixed surcharge consisting of Wood chips, mineral binder and mineral fines
  • the proportion of wood chips is between 55 and 75 wt .-%, preferably between 65 and 70 wt .-%, and the proportion of the mineral binder is between 23 and 44 wt .-%, preferably between 28 and 34 wt .-%, in each case based on the total weight of the fixed surcharge (consisting of wood shavings, mineral binder and mineral fines).
  • the proportions referred in each case relate to oven-dry mixture constituents.
  • the bulk density for the dry mineralized chips between 50 to 500 kg / m 3 .
  • the mineral binder used is preferably dolomite, lime, anhydrite binder, magnesia binder, gypsum and / or cement, since these are substances which are customary in the construction industry. It is thus avoided to introduce larger amounts of potentially harmful foreign substances in the concrete.
  • hydraulic binders are particularly suitable. Hydraulic binders are binders which, in contrast to the unhydraulic binder, set even in the presence of water and are insoluble in water. These are z. Pozzolans, trass, and cement.
  • the binder is present after the reaction in hydrated form.
  • the invention further includes the use of the aggregate as a lightweight aggregate in the construction industry, wherein the aggregate can be used as a classic coarse aggregate for concretes. It is also within the scope of the invention to produce from the aggregate a bed which, for example, is then covered with screed, mastic asphalt or drywall.
  • the sheathed wood shavings can be stored indefinitely and can thus be used for the production of lightweight concrete as structural concrete as well as for the production of wall and ceiling elements with very good building physics properties.
  • the properties of such concretes or shaped elements are characterized by an above-average thermal insulation compared to conventional lightweight concretes of the same gross density class.
  • lambda values of up to 0.07 W / mK can be achieved for insulating layers.
  • the material is diffusion-open and therefore provides excellent moisture balance.
  • Components made from shaved wood chips can absorb dowels, nails and screws and transmit forces.
  • the surface of a wall and ceiling element containing the additive of the invention is suitable as a plaster base as well as an inner shell for ventilated facade elements.
  • such elements in hauftechniksporiger execution are excellent absorber media for sound insulation, it can absorption properties of> 8 dB can be achieved. Thus, such elements can be successfully used in noise protection on rail or traffic routes.
  • the material is also suitable as insulating material in the form of a loose fill under screeds and dry screeds.
  • the bed can be described as non-migratory and may therefore be installed dry according to current regulations.
  • Monolithic wall or ceiling portions of the mineralized chips as aggregate have a bulk density between 200 and 1600 kg / m 3 The density varies greatly depending on the embodiment.
  • Aggregated insulating layers and absorber materials with mineralized wood chips as aggregate have a bulk density of between 200 and 1000 kg / m 3 , structural solids with a closed structure are between 500 and 1600 kg / m 3 at gross densities.
  • the invention also provides a process for the production of the additive according to the invention, wherein a) one of the above-mentioned chip fraction and particle type is preferably obtained from debarked tree trunks, b) the chip fraction with mineral binder, further mineral fines with a particle diameter of 0.05 Up to 0.7 pm and water is intensively mixed and coated and c) the jacketed chip fraction is poured into a heap and this heap with sufficient time for hydration, preferably at least 8 hours stored and, if necessary, then in the ambient air or in a thermal Drier is dried.
  • the cubic chip fraction is produced using specially designed shredding and separation machines.
  • the debarked logs are crushed and then the cubic chip obtained then fractionated through a sieve, preferably vibrating sieves. Coarse particles exceeding a certain size and fine fractions are separated and only the appropriate middle fraction is passed on to the further process.
  • cubic wood chips can also be produced from industrial chips. All- However, when shredding the industrial chips, the required cubic shape can be achieved less accurately and it is due to the screening with a significantly higher amount of waste material expected.
  • longitudinal chips made from woodchips with a length of up to 35 mm can also be used, whereby these are processed separately in a separation process in such a way that the chip structure is suitably suited to the formulations of the absorber media.
  • the further processing of the chips takes place in the same production plant as in the production of cubic or planed chip fractions.
  • the fractionated chips are weighed and then mixed according to the recipe with binder, mineral fines with a particle diameter of 0.05 to 0.7 pm and mixing water. This happens at increased speed of the mixer and associated increased centrifugal forces in the mix.
  • the moisture of the wood chips is measured by moisture sensors before adding to the mixer and adjusted the required amount of mixing water accordingly.
  • the actual mixing process continues until the chips have been coated uniformly with binder consisting of binder, ultrafine particles and water.
  • the finished jacketed cubic or elongated wood chips or wood shavings fall from the mixer on a conveyor belt and are heaped up airy to a pile.
  • the residence time of the chips in this heap is chosen so that the reaction of the binder used has occurred safely. This takes at least 8 hours, as have proven particularly favorable times of at least 48 hours.
  • the chips are moved or rearranged at a certain interval. This shift is necessary until the reaction of the binder has occurred. A shift can also be made by Vibrating chutes or other semi - or automated procedures are guaranteed.
  • the chips are stored for further use. Before further processing, such as bagging or loading, it may be necessary to completely dry the chips in a dryer to the required residual moisture.
  • Double mineralized chips can be processed in concrete plants, etc. to form bonded, monolithic components. Double mineralized chips are also suitable as a starting material for concrete, but especially for loose fillings, bed covers (especially to prevent weed formation), as a design element and much more.
  • the aim of the mixing process is to distribute the glue consisting of binder, mineral (ultrafine) particles and water as evenly as possible around the wood particles, thus ensuring a homogeneous sheathing.
  • This is advantageously carried out at rotor speeds between 40 and 120 U / min, preferably about 70 U / min in a three-axis motion.
  • mixer types are used, which ensure increased centrifugal forces in three-dimensional material transport.
  • a goal-oriented and reproducible ensures bare sheathing of the chips, as achieved by increased speeds and specially arranged mixing tools floating mixing conditions in the material. This results in a superimposed axial and radial movement of the mixed material in the form of a helical three-dimensional transport, which continues in a circular manner in the mixing trough.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L'invention concerne un adjuvant composé de copeaux de bois munis d'un enrobage en un liant minéral. L'enrobage contient, outre le liant minéral, d'autres particules minérales finement divisées, au moins 50% des autres particules minérales présentant un diamètre de particule de 0,05 à 0,7 µm.
PCT/EP2011/069671 2010-11-11 2011-11-08 Copeaux de bois minéralisés WO2012062769A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010051059 DE102010051059B4 (de) 2010-11-11 2010-11-11 Zuschlagstoff aus Holzspänen, Verwendung dieses Zuschlagstoffes und Verfahren zu seiner Herstellung
DE102010051059.9 2010-11-11

Publications (1)

Publication Number Publication Date
WO2012062769A1 true WO2012062769A1 (fr) 2012-05-18

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ID=44983509

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/069671 WO2012062769A1 (fr) 2010-11-11 2011-11-08 Copeaux de bois minéralisés

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DE (1) DE102010051059B4 (fr)
WO (1) WO2012062769A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2873654A1 (fr) * 2013-09-14 2015-05-20 MABO Naturdämmstoffe GmbH & Co. KG Mélange de matériaux pour la fabrication de matériaux de construction présentant de bonnes propriétés thermiques et absorbant le son
DE202014010772U1 (de) * 2014-05-02 2016-08-09 Veit Dennert Kg Baustoffbetriebe Mobiles Gebäudeelement, insbesondere Gebäude-Raumzelle oder Wand- oder Decken-Teil hierfür
EP3421200B1 (fr) 2017-06-30 2020-06-03 SWISS KRONO Tec AG Plaque de matière dérivée du bois avec des sphères creuses
DE202021101899U1 (de) * 2021-04-09 2021-07-13 Cemwood Gmbh Ausgleichsschüttung mit mineralisierten Holzspänen
AT524579B1 (de) 2021-04-22 2022-07-15 Eps Leichtbeton Gmbh Verfahren zum Bereitstellen einer vorgefertigten Trockenmischung zum Herstellen von Holzbeton

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762267A (en) 1923-08-22 1930-06-10 Nat Lime Ass Filler for building units and process of preparation
FR863626A (fr) 1940-01-30 1941-04-05 R May & Son Ltd Perfectionnements aux matériaux de construction
DE1913939A1 (de) 1969-03-19 1970-10-08 Kalk Chemische Fabrik Gmbh Mineralisierungsmittel fuer Holz zur Erzeugung von Holzbeton
DE2435105A1 (de) 1974-07-22 1976-02-05 Ludwig Hoerling Fabrik Chemisc Verfahren zur herstellung von holzbeton-bauelementen
DE2715533A1 (de) 1977-04-07 1978-10-12 Ludwig Hoerling Fabrik Chemisc Verfahren zur herstellung von holzbeton
EP0076916A1 (fr) * 1981-09-11 1983-04-20 Theodoros Mavropoulos Procédé de fabrication d'un matériau calorifuge, utilisation de ce matériau pour des éléments de construction, et élément de construction fabriqué en utilisant ce matériau
WO1993009943A1 (fr) 1991-11-13 1993-05-27 Hansruedi Walter Granulat libre a double enrobage s'utilisant dans la technologie bois/beton et procede de fabrication
EP0735162A2 (fr) 1989-04-17 1996-10-02 ECCO Gleittechnik GmbH Fibres de renforcement et/ou de traitement à base de fibres végétales, leur procédé de production et leur utilisation
DE19851630A1 (de) * 1998-11-10 2000-05-11 Hdb Weissinger Gmbh Wand- / Decken- und Dachsystem für Fertigbauten
EP1108696A1 (fr) * 1999-12-17 2001-06-20 Heribert Höhn Procédé pour la minéralisation de matières premières renouvables, utilisation des matières premières minéralisées pour la fabrication de béton et d'éléments et matières de construction et les éléments et matières de construction ainsi obtenues
FR2830855A1 (fr) * 2001-10-16 2003-04-18 Michel Mouly Procede de preparation d'un beton isolant leger renfermant un granulat de liege ou de bois ou analogue enrobe de ciment, et beton isolant leger obtenu
WO2007124727A2 (fr) 2006-05-03 2007-11-08 Martin Borkowski Granulat lignocellulosique et son procédé de fabrication

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677295B1 (fr) * 1991-06-05 1995-04-28 Ind Bois Stabilise Procede de traitement du bois sous forme divisee a destination de charge de beton.

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762267A (en) 1923-08-22 1930-06-10 Nat Lime Ass Filler for building units and process of preparation
FR863626A (fr) 1940-01-30 1941-04-05 R May & Son Ltd Perfectionnements aux matériaux de construction
DE1913939A1 (de) 1969-03-19 1970-10-08 Kalk Chemische Fabrik Gmbh Mineralisierungsmittel fuer Holz zur Erzeugung von Holzbeton
DE2435105A1 (de) 1974-07-22 1976-02-05 Ludwig Hoerling Fabrik Chemisc Verfahren zur herstellung von holzbeton-bauelementen
DE2715533A1 (de) 1977-04-07 1978-10-12 Ludwig Hoerling Fabrik Chemisc Verfahren zur herstellung von holzbeton
EP0076916A1 (fr) * 1981-09-11 1983-04-20 Theodoros Mavropoulos Procédé de fabrication d'un matériau calorifuge, utilisation de ce matériau pour des éléments de construction, et élément de construction fabriqué en utilisant ce matériau
EP0735162A2 (fr) 1989-04-17 1996-10-02 ECCO Gleittechnik GmbH Fibres de renforcement et/ou de traitement à base de fibres végétales, leur procédé de production et leur utilisation
WO1993009943A1 (fr) 1991-11-13 1993-05-27 Hansruedi Walter Granulat libre a double enrobage s'utilisant dans la technologie bois/beton et procede de fabrication
DE19851630A1 (de) * 1998-11-10 2000-05-11 Hdb Weissinger Gmbh Wand- / Decken- und Dachsystem für Fertigbauten
EP1108696A1 (fr) * 1999-12-17 2001-06-20 Heribert Höhn Procédé pour la minéralisation de matières premières renouvables, utilisation des matières premières minéralisées pour la fabrication de béton et d'éléments et matières de construction et les éléments et matières de construction ainsi obtenues
FR2830855A1 (fr) * 2001-10-16 2003-04-18 Michel Mouly Procede de preparation d'un beton isolant leger renfermant un granulat de liege ou de bois ou analogue enrobe de ciment, et beton isolant leger obtenu
WO2007124727A2 (fr) 2006-05-03 2007-11-08 Martin Borkowski Granulat lignocellulosique et son procédé de fabrication

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Publication number Publication date
DE102010051059B4 (de) 2014-07-17
DE102010051059A1 (de) 2012-05-16

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