FR2924635A1 - Process for producing laminate building elements - Google Patents

Process for producing laminate building elements Download PDF

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Publication number
FR2924635A1
FR2924635A1 FR0850430A FR0850430A FR2924635A1 FR 2924635 A1 FR2924635 A1 FR 2924635A1 FR 0850430 A FR0850430 A FR 0850430A FR 0850430 A FR0850430 A FR 0850430A FR 2924635 A1 FR2924635 A1 FR 2924635A1
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FR
France
Prior art keywords
cellular concrete
density
concrete
layers
plates
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
FR0850430A
Other languages
French (fr)
Inventor
Cock Dominique Herman Henri De
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ASMAN NV
Original Assignee
ASMAN NV
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
Priority to BE200700588A priority Critical patent/BE1017892A3/nl
Application filed by ASMAN NV filed Critical ASMAN NV
Publication of FR2924635A1 publication Critical patent/FR2924635A1/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/50Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/008Producing shaped prefabricated articles from the material made from two or more materials having different characteristics or properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0068Embedding lost cores

Abstract

Process for the production of building elements consisting of at least two cellular concrete layers, of low and high density respectively, characterized in that the method consists in placing in a mold (15) fresh concrete grout (16) ; at least partially immersing in this fresh concrete slurry (16) at least one plate (3), which has been subjected beforehand to autoclaving, made of cellular concrete of another density; let the fresh concrete grout (16) rise; allow to harden until sufficient strength is obtained for the stripping of the assembly (17); decapping and then cutting the assembly (17) to obtain building elements (18) having the desired dimensions and the desired number of layers; and finally passing the building elements (18) through the autoclave to obtain a durable adhesion between the successive layers of low and high density cellular concrete and to obtain the necessary compressive strength exhibited by the high density cellular concrete.

Description

The present invention relates to a method for producing laminated building elements.
More specifically, the invention relates to the production of building elements consisting of at least two layers of cellular concrete of different densities.
The present invention also relates to the laminated building element.
It is known that building elements made of low density cellular concrete, although they have good thermal insulation properties, often have insufficient limiting load to be able to use them for building purposes.
Structural elements consisting of several layers of cellular concrete, in which a low density cellular concrete slab is bonded to a higher density concrete concrete slab or other construction material, are already known. High density cellular concrete acts as a load bearing element in the construction, while low density cellular concrete has a thermal insulating function.
A disadvantage of this process is that it requires a large labor force and takes time because of sticking which requires handling of the individual plates.
Another disadvantage lies in the fact that adhesive-bonded cellular concrete slabs must be subjected to a perfect reciprocal alignment to avoid measurement discrepancies in the finished product.
A further disadvantage lies in the fact that the measurement deviations of the plates assembled by gluing add up in the finished product.
Yet another disadvantage is that the adhesive is less vapor permeable than cellular concrete, so that condensation and moisture problems can be encountered in the building element.
In addition, possible residues of glue can be seen in the building element.
It is an object of the present invention to provide a solution for the aforementioned disadvantages as well as others. To this end, the invention relates to a process for the production of building elements consisting of at least two layers of cellular concrete, respectively of low and high density, the method of placing in a mold fresh concrete grout. ; at least partially immersing in this fresh concrete slurry at least one plate, which has been subjected beforehand to autoclaving, made of cellular concrete of another density; let the fresh concrete grout rise; allow to harden until sufficient strength is obtained for the stripping of the assembly; deconstruct and then cut the assembly to obtain construction elements having the desired dimensions the desired number of layers; and finally passing the building elements through the autoclave to achieve a durable adhesion between successive layers of low and high density cellular concrete and to obtain the necessary compressive strength exhibited by the high density cellular concrete.
An advantage lies in the fact that, thanks to the autoclaving of the building elements, a bond is obtained between the cellular concrete which has already been subjected to autoclaving and the cellular concrete which is still to be subjected to of autoclaving, so that a very well assembled by the formation of crystalline bonds is obtained.
An additional advantage lies in the fact that the structural element obtained from cellular concrete is autogenous and consists solely of cellular concrete, so that a more uniform behavior of the whole is obtained.
Another advantage lies in the fact that this autogenous cellular concrete construction element has thermal insulation and acoustic insulation qualities and support qualities that are better than those of the plates to be assembled.
A further advantage lies in the fact that this process can be mechanically implemented, which is favorable for the control capacity and for the precision of the construction elements, and in the fact that this process requires less less time, so it is less expensive.
Another advantage of this method lies in the fact that it eliminates any glue consumption, so that the risk related to condensation and moisture problems in the building element is far lower, while avoiding the costs related to the glue.
Preferably, the cellular concrete layer obtained from the pre-autoclaved cellular concrete slab forms a low density layer and the layer of cellular concrete that is gets from the fresh concrete grout forms a layer of higher density, all can be cut using conventional cutting son.
The present invention also relates to a building element consisting of layers of cellular concrete of different densities, the building element being autogenous or, in other words, comprising only cellular concrete.
In order to better indicate the characteristics of the invention, the steps of the method for producing the construction elements according to the invention are described below, by way of example, without any limiting character, with reference to FIGS. attached drawings in which Figure 1 shows the first step of the method for producing the building elements according to the invention; Figure 2 shows a view along the arrow F2 Figure 1; Figures 3 to 19 show the following steps of the method for producing the building elements according to the invention; Figures 20 to 28 show several embodiments of a building element.
FIG. 1 is a schematic representation of the first step of the method in which a subdivision device 1 consisting of a clamping mechanism 2 is used for the mutual separation of cellular concrete plates 3 which have been separated from each other. subjected to a pre-autoclave pass and by a fixing frame 4 applied over it, for the capture of the aforementioned plates 3.
The surface of the plates 3 which have been subjected to a pre-autoclave passage may optionally be treated with water or with another substance so as not to slow down the rise of the fresh concrete grout.
The clamping mechanism 2 is constituted in the present case by several parallel sections 5 which are arranged apart from each other in a manner corresponding to the thickness of said plates 3 and which are provided with upstanding walls 6 between which may come insert these plates 3 in the erect state.
The distance between the sections 5 may be adjusted depending on the thickness and the number of plates used 3.
fastening frame 4 is constituted at its periphery by a frame 7 to support a network 8 of sleepers 9, as shown in Figure 2, to which frame are attached parallel rows of pins 10 facing down, above the concrete plates 3 and the position of the crosspieces 9 and the pins 10 may be optionally adapted according to the dimensions of the cellular concrete plates which have been subjected to a prior autoclave, in the clamping mechanism 2. The subjected to a prior passage through the autoclave. Each pin 10 is provided in its upper part with a stop 11.
Frame 7 may be made of steel or other suitable material for this purpose.
For the handling of the plates 3 present in the clamping mechanism 2, the fixing frame 4 is lowered or pushed downwards with the pins 10, in the direction indicated by the arrow P, as represented in FIG. by means of a lift or other suitable means for this purpose, not shown in the figures, for the purpose of pushing the pins 10 into the cellular concrete plates 3 which have been subjected to a prior passage through the autoclave, up against the abutments 11.
As shown in FIG. 4, it is possible to provide in the crosspieces 9 of the frame 7 or in the crosspieces 30 added additionally, needles 12 to which armed lattices 13 can be suspended.
After pushing the pins 10 deep enough into the autoclaved plates 3, the attachment frame 4 may be shown as shown in FIG. 5 to be moved to a subsequent subdivision device 14 for following steps of the process according to the invention, which is represented in FIG.
The subdivision device 14 used in the following step consists mainly of a mold 15 whose dimensions correspond for example to a length of 6 m, a width of 1.50 m and a height of 0.50 m, in which, as shown in FIG. 6, a measured quantity of fresh concrete slurry 16 is applied to form cellular concrete which, after hardening, preferably has a higher density than that of the cellular concrete slabs 3 which have been subjected to pre-autoclaving.
The pre-autoclaved cellular concrete plates 3 and the potential reinforced lattices 13 are in this case aligned with the flow gauge 15.
Preferably, the high density cellular concrete has a density which is greater than 300 kg / m 3 and the low density cellular concrete has a density which is less than 150 kg / m 3.
The pre-autoclaved cellular concrete slabs 3 and the individual intermediate reinforced lattices 13 are lowered, in the next step, as shown in FIG. 7, as quickly as possible after the pouring of the slurry. fresh concrete 16 in the mold 15, moving the fastening frame 4 to which the plates are suspended 3 The quantity of this fresh concrete grout 16 may represent a measured quantity to obtain the fact that, when the fresh concrete grout is raised, 16 the level of the fresh concrete grout 16 rises to the highest level of the plates 3, as shown in FIG.
Due to the difference in density between the pre-autoclaved and pre-autoclaved cellular concrete slabs, and because of the upward force of the climbing process, during the climb of the fresh concrete grout 16, the attachment frame 4 will be subjected to an upward force.
To prevent upward movement of the fastening frame 4 with the plates 3, the fastening frame 4 can be attached to the mold 15.
As soon as the fresh concrete grout 16 is sufficiently hardened and has therefore acquired the necessary strength, the fixing frame 4 can be tilted upwards in the direction indicated by the arrow Q, as shown in FIG. 9, if although the pins 10 withdraw from the pre-autoclaved cellular concrete plates 3 and the autoclaved plates 3 remain inserted into the fresh concrete slurry 16 which has not yet been passed to the autoclave. 'autoclave.
In the case where one also hangs armed lattices 13 to the fastening frame 4, the needles 12 which hold these lattices 13 must first be brought to a suitable position to uncouple the lattices and not to cause the lattices 13 at the tensile elevation of the fastening frame 4, so that the reinforced mesh 13 remain in the cellular concrete that has not yet been autoclaved, as shown in Figure 10.
As a result of this procedure, a block of cellular concrete is obtained having several successive layers of cellular concrete of different densities which, alternatively, have already been passed through the autoclave and have not yet been autoclaved ( as can be seen in FIG. 9), the layers that have not yet been subjected to autoclaving may optionally be provided with a reinforced mesh 13 (as can be seen in FIG. 10).
After moving the securing frame 4 away, the resulting assembly 17 as a block is deconstructed, as shown in FIGS. 11 and 12.
Then, the assembly 17 can be cut to form the building elements 18 having the desired dimensions and the desired number of layers. The cutting takes place for example by means of a smooth or twisted steel wire 19, as shown in FIGS. 13 to 19. In FIGS. 13 to 16, there is shown a flat production system 20 in which the wires The horizontal cutters proceed to a simultaneous cut through the cellular concrete slabs already passed through the autoclave and the fresh concrete slurry which still has to pass through the autoclave (as can be seen in Figures 13 to 15). . The vertical cutting wires can cut through the cellular concrete plates already passed through the autoclave (as can be seen in Figure 15) and / or through the cellular concrete which has yet to pass through the autoclave ( as can be seen in Figures 13 and 14). The transverse cutting son, as shown for example in Figure 16 for the case in which no armed mesh is provided, perform a simultaneous cutting through the cellular concrete which has not yet passed. autoclave and cellular concrete that has already been autoclaved.
FIGS. 17, 18 and 19 show a tilting production system 21. In this case, during the horizontal cut, cutting is carried out through the cellular concrete which has not yet passed through the autoclave (as shown in Figure 17) and / or through the cellular concrete that has already passed through the autoclave (as shown in Figure 18). During vertical cutting (as can be seen in FIGS. 17 and 18) and during transverse cutting (as shown in FIG. 19), a simultaneous cutting is carried out through the cellular concrete which has already passed through the autoclave and the aerated concrete that has not yet been autoclaved.
The distance between the steel wires 19 can be selected so that the building elements 18 have a high density cellular concrete layer and a low density cellular concrete layer, as shown in FIG.
The distance between the steel wires 19 in FIGS. 13 to 15 can be selected such that a sandwich panel 22 is obtained in which a low-density cellular concrete core is surrounded by two adjacent concrete layers. high density cell, as shown in Figure 21.
One of the high density layers may or may not be armed, as shown in FIG.
When cutting the construction elements 18, profiling can also be envisaged, so that after cutting, it is possible to obtain construction elements 18 comprising, for example, a tooth 23 and a groove 24, an example being shown in FIG. figure 23.
The assembly which is composed of the obtained building elements 18 (as can be seen in FIGS. 20 and 21) is then autoclaved, so that the cellular concrete plates which have been subjected to The autoclave and autoclaved cellular concrete bind to one another to obtain a structural element having superior thermal, acoustic and thermal insulation properties. support.
It is possible possibly, before or after the passage through the autoclave, to make handles by milling.
By subjecting the construction elements passed by the autoclave to further processing, they can be given all kinds of shapes, only some of which are shown by way of example in Figs. 26-28.
It goes without saying that the cellular concrete slabs which have been subjected beforehand to a passage through the autoclave in the building element, during the autoclaving of the construction element, are subject for a second time heat treatment; However, this second heat treatment in no way undermines the thermal and acoustic quality of this aerated concrete, quite the contrary.
By the constitution of the cellular concrete with layers of different densities, one obtains elements of construction having a support force which is determined mainly by the layers of high density, which can be armed or not, and which is sufficient for an application in a bearing structure, while the thermal insulation quality of a building element of this type is determined primarily by the layer or by the low density layers.
Via the laminated structure, a construction element is also obtained which has favorable properties in the field of sound insulation.
The present invention is in no way limited to the form or embodiments described by way of example and shown in the figures; on the contrary, a method of this type can be implemented according to different variants, without departing from the scope of the invention.

Claims (16)

  1. Process for the production of structural elements consisting of at least two cellular concrete layers, of low and high density respectively, characterized in that the method consists in placing in a mold (15) fresh concrete grout ( 16); at least partly immersing in said fresh concrete slurry (16) at least one plate (3), which has been subjected beforehand to autoclaving, made of cellular concrete of another density; let the fresh concrete grout (16) rise; allow to harden until sufficient strength is obtained for the stripping of the assembly (17); decapping and then cutting the assembly (17) to obtain building elements (18) having the desired dimensions and the desired number of layers; and finally passing the building elements (18) through the autoclave to obtain a durable adhesion between the successive layers of low and high density cellular concrete and to obtain the necessary compressive strength exhibited by the high density cellular concrete.
  2. 2. Method according to claim 1, characterized in that the cellular concrete forming the cellular concrete plate (3) which has been subjected beforehand to an autoclave is chosen in such a way that a layer of low density cellular concrete, and the fresh concrete grout (16) is chosen such that a layer of high density cellular concrete is obtained.
  3. 3. Method according to any one of the preceding claims, characterized in that the cellular concrete plates (3) which have been subjected beforehand to autoclaving are aligned with the flowable gauge (15).
  4. 4. Method according to any one of the preceding claims, characterized in that the cellular concrete plates (3) which have been subjected beforehand to an autoclave are fixed, before immersion, to a fastening frame (4) having pins (10) which are driven into the material of the plates (3) for fixing the plates (3).
  5. 5. Method according to claim 4, characterized in that, before the plates (3) are applied to the fixing frame (4), the plates (3) are applied in a remote clamping mechanism (2). one of the other.
  6. 6. Method according to claim 4 or 5, characterized in that the plates (3) in the fresh concrete slurry (16) are immersed by moving the fastening frame (4) to which the plates (3) are suspended.
  7. 7. Method according to any one of the preceding claims, characterized in that the amount of the fresh concrete slurry (16) which is applied in the mold (15) is a measured quantity such that, when climbing the concrete slurry fresh (16), it reaches the highest level of the plates (3).
  8. 8. Method according to any one of claims 4 to 7, characterized in that the fresh concrete slurry (16) found in a mold (15) to which the fastening frame (4) can be attached.
  9. 9. Method according to any one of the preceding claims, characterized in that the cutting of the assembly (17) to obtain building elements (18) takes place by means of a smooth or twisted steel wire {19 ).
  10. Method according to claim 9, characterized in that the distance between the steel wires (19) is such that the building elements (18) comprising a layer of high density cellular concrete and a layer of low density cellular concrete.
  11. 11. The method of claim 9 or 10, characterized in that the distance between the steel son (19) is such that one obtains a sandwich panel (22) comprising a central portion of low density cellular concrete and two adjacent layers of high density.
  12. 12. Method according to any one of the preceding claims, characterized in that during the cutting of the cellular concrete is carried out a simultaneous cutting through the layers of low and high density.
  13. 13. Method according to any one of the preceding claims, characterized in that a profiling can also take place during cutting of the elements made of cellular concrete.
  14. 14. A method according to any one of the preceding claims, characterized in that the low density cellular concrete layers have a maximum density 150. The high density con fi ncellular layers have a minimum density of 300 kg / m3.
  15. 15. Construction element consisting of layers of cellular concrete of different densities, characterized in that the construction element is autogenous.
  16. 16. Building element according to claim 15, characterized in that the layers of high density cellular concrete are provided with a reinforced mesh.
FR0850430A 2007-12-10 2008-01-24 Process for producing laminate building elements Pending FR2924635A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE200700588A BE1017892A3 (en) 2007-12-10 2007-12-10

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FR2924635A1 true FR2924635A1 (en) 2009-06-12

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FR0850430A Pending FR2924635A1 (en) 2007-12-10 2008-01-24 Process for producing laminate building elements

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EP (1) EP2070671A1 (en)
BE (1) BE1017892A3 (en)
FR (1) FR2924635A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482196B (en) * 2010-07-23 2014-12-31 Page Concrete & Steel Ltd A concrete slab
CN102672798A (en) * 2012-04-24 2012-09-19 贵州博典建材化工科技有限公司 Simple production method for foam slurry core-filled building blocks
CN102672797A (en) * 2012-04-24 2012-09-19 贵州博典建材化工科技有限公司 Slip casting method of foam slurry heat-preservation wallboard
DE102012024884A1 (en) 2012-12-19 2014-06-26 Xella Baustoffe Gmbh Thermal insulation panel has rectangular core plate with the limiting core plate surface which are encapsulated completely from casing whose thermal conductivity is higher than thermal conductivity of core plate
DE102012024885A1 (en) 2012-12-19 2014-06-26 Xella Baustoffe Gmbh Reinforced structural panel and method and apparatus for making the structural panel
CN107584649A (en) * 2017-10-12 2018-01-16 孙章 A kind of method and its equipment for manufacturing complex heat-preservation aerated-block
DE102017126749A1 (en) * 2017-11-14 2019-05-16 WEKO Consulting and Engineering Ltd. block stone

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119919A (en) * 1977-03-28 1978-10-19 Kumagai Gumi Co Ltd Manufacture of light weight foamed concrete having strengthened surface
SE430484B (en) * 1980-01-31 1983-11-21 Yxhult Ab PROCEDURE TO HAVE A BODY PREFERRED BY THE BUILDING PRODUCT ASTADKOMMA A LAYER
JPH03146337A (en) * 1989-11-01 1991-06-21 Central Glass Co Ltd Composite panel and manufacture thereof
JP3146337B2 (en) 1995-02-10 2001-03-12 株式会社セキホー Seedling container

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BE1017892A3 (en) 2009-10-06
EP2070671A1 (en) 2009-06-17

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