FR2795440A1 - INSULATING WALL - Google Patents

Abstract

An insulating wall has insulation in a cavity between parallel internal and external insulating layers. Ties bridge the cavity to connect the layers. The whole wall is less than 40 cm thick and each layer is ≥ 4 cm thick. Each cubic meter of the layers includes ≥ 250 kg of cement, ≥ 250 l of air trapped in particles of insulating material, an agent causing the cement to coat the particles and water so the water cement ratio is 0.2 - 0.5. Independent claims are included for the following: (a) The above wall where the amount of additive ≥ 0.4% the wt of concrete or ≥ 0.8 l/m<3> of the mixture. (b) Making a wall as above by casting the inner and outer layers and then pouring the insulation into the cavity. Preferred Features: The insulation may be glass coated beads or porous volcanic rock.

Description

The invention relates to an insulating wall intended to intervene in the

  construction of a building, for example a dwelling or the like, and comprising an internal wall as well as an external wall, in particular oriented towards the interior and towards the exterior of said building, said walls being, on the one hand, arranged in look at each other and in a substantially parallel manner and, on the other hand, interconnected by means of connecting means. The present invention relates to the field of the manufacture of walls, usually called pre-walls, and intended, after their manufacture, to be transported in order to be installed on the

  construction site of a building.

  We already know insulating walls corresponding to

  the description above. In fact, such walls appear under

  the shape of two walls made of traditional concrete and connected together by a metal-type reinforcement. These two walls delimit, between them, a spacing which it is usual to fill with an insulating material, in particular a hydraulic mixture based on concrete containing polystyrene, in order to confer on said wall.

insulating properties.

  In this regard, it will be noted that, in such a case and in order to meet the insulation standards in force, it is necessary to design walls whose thickness is at least 40 cmn. Such a wall thickness results in a relatively large spacing between the walls which requires, for the filling of this spacing, a large amount of insulating material. The latter, consisting of a hydraulic mixture made from concrete and generally containing polystyrene or the like, is

relatively expensive.

  One solution for reducing the thickness of such a wall, while giving it a coefficient of thermal insulation satisfying the standards in force, consists in supplementing this wall, internally and / or externally, with an insulating lining wall. Such an embodiment has, in fact, the disadvantage of having, on the one hand, to manufacture and, on the other hand, to set up such a wall.

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  of dubbing which, obviously, lengthens the duration of assembly of the wall

  and causes an additional cost in its manufacture.

  Another drawback appears when it comes to mounting a piece of furniture or the like against such a wall. Such an assembly requires the installation of a fixing member such as a screw or the like intended to cooperate with a dowel or the like introduced into an orifice made at the level of the wall. The realization of such an orifice at the level of a traditional concrete pre-wall proves to be particularly tedious and requires a

  appropriate professional tools.

  The present invention aims to provide a solution to these drawbacks through an insulating wall of new design. Thus, the present invention relates to an insulating wall intended to intervene in the construction of a building, for example a dwelling or the like, and comprising an internal wall as well as an external wall, in particular oriented inwards and outwards. of said building, said walls being, on the one hand, arranged facing one another and in a substantially parallel manner and, on the other hand, connected to each other by means of connection means, characterized by the fact on the one hand, that said wall has a thickness of less than 40 cm and, on the other hand, that said internal and external walls each have a thickness of at least 4 cm and are obtained from a mixture hydraulic which, per m3, contains: - at least 250 kg of cement; - at least 250 liters of air trapped through particles of an insulating material; - an adjuvant capable of coating said particles of insulating material and whose mass is, relative to that of the cement, at least equal to 0.4%; - water in quantity such as the ratio, by mass,

  water / cement is between 0.2 and 0.5.

  According to an additional characteristic, said particles of insulating material are of the solid type and are defined in a

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  expanded type synthetic material, especially polystyrene or

  other, for example in the form of beads.

  However, such particles may also be of the hollow type and be delimited by a glass envelope, of synthetic material or the like, said envelope being, for example, of spherical shape. According to another characteristic, said particles are defined in a porous material of the volcanic rock type or the like. The invention also relates to an insulating wall intended to intervene in the construction of a building, for example a dwelling or the like, and comprising an internal wall as well as an external wall, in particular oriented inwards and outwards. exterior of said building, said walls being, on the one hand, arranged opposite one another and in a substantially parallel manner and, on the other hand, connected to each other by means of connecting means, characterized by on the one hand, that said wall has a thickness of less than 40 cm and, on the other hand, that said internal and external walls each have a thickness of at least 4 cm and are obtained from a hydraulic mixture which, per m3, contains: - at least 250 kg of cement; - inclusions of air bubbles representing a total volume of air of at least 250 liters; - an adjuvant, on the one hand, capable, during the production of said mixture, of entraining air in the latter for the creation of said inclusions and, on the other hand, whose volume is at least 0.8 liters per m3 of hydraulic mixture; - water in quantity such as the ratio, by mass,

  water / cement is between 0.2 and 0.5.

  According to an additional characteristic, the water intended to be incorporated into the hydraulic mixture is, beforehand, refrigerated and

  is preferably frozen, at least in part.

  According to an additional characteristic, the cement can be combined with a filling material consisting of particles

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  silica-based fines, such as slag, ash,

  smoke or combustion by-products.

  In fact, the mass of this added filling material corresponds to a percentage of 30 to 60% of the mass of cement in the hydraulic mixture. Another peculiarity concerns the fact that the mixture also comprises metallic type fibers and / or

  glass in respective quantities of at least 25 kg / m3 and 5 kg / m3.

  An additional characteristic concerns the fact that the mixture also contains an amount of sand of the order of 10 to

kg / m3.

  According to another characteristic, the internal and external walls define a space capable of being filled, in particular by pouring, with an insulating material of composition similar to the

  hydraulic mixture described above.

  The present invention also relates to a process for manufacturing an insulating wall, process by which: - a cement is introduced, into which a water containing an adjuvant is incorporated, which, as the case may be, defines inclusions air bubbles or comes in addition to particles of an insulating material; - Before the introduction of the cement into the mixer, said particles of insulating material are then introduced into the latter, if necessary, followed by sand and then a filling material; - Adding to the cement, before the incorporation of water and the adjuvant, and, if necessary, reinforcing fibers; this first hydraulic mixture obtained is mixed before it is poured into a mold; - We have in this mold, before or after casting, the connecting means; - Ensuring the drying of said first hydraulic mixture in order to define, as appropriate, an external or internal wall of the wall;

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  - a second hydraulic mixture is produced, similarly to the first and of the same composition, intended to define, after drying, as the case may be, an internal or external wall; - This second hydraulic mixture is poured into a mold; - One proceeds to the reversal of the external or internal wall obtained from the first hydraulic mixture and it ensures, in part, the immersion of its connecting means in the second hydraulic mixture;

  - drying of said second hydraulic mixture is carried out.

  According to an additional characteristic, the water added to the cement is, beforehand, refrigerated and is preferably ice-cold,

at least in part.

  It will be noted that the drying of at least one of said hydraulic mixtures is carried out in an oven at least 35 ° C., preferably 40 ° C., for a period greater than 6 hours, of

  preferably at least 8 hours.

  The present invention makes it possible, in fact, to produce an insulating pre-wall meeting the current insulation standards and

  having a thickness substantially less than that of a pre-

  wall obtained, in a traditional way, from solid concrete and filled with an insulating material. This new insulating pre-wall allows a substantial gain in raw material and has a weight significantly lower than that of a traditional pre-wall. Its manufacture, handling, transport and installation on

  site are, therefore, significantly facilitated.

  In addition, by proposing a new pre-wall with a weight significantly lower than that of a traditional pre-wall, we significantly reduce the load imposed on the foundations of a building which is of substantial interest for constructions. carried out

on sensitive terrain.

  It will be noted that the fact of proposing a new insulating wall of thickness less than the insulating walls of the prior art makes it possible to achieve a substantial gain in living area, this

  for an identical floor area of the building.

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  In addition, the spacing between the walls of said insulating pre-wall is reduced so that the quantity of insulating material necessary for its filling is, here again and advantageously, reduced

  in comparison with the prior art walls.

  The fact that the walls and the filling of their spacing are made from an insulating material advantageously avoids having to resort to the installation of at least one

  lining wall, insulating and expensive, after having erected the wall.

  It is therefore possible, in particular after giving said wall an appropriate external appearance during its manufacture, to carry out, directly and without prior preparation, the application of a

  upholstery or other type of covering on such a wall.

  It will also be noted that the fact of incorporating an insulating material in said walls advantageously makes it possible to lower the compactness, density and hardness of such a wall compared to a traditional concrete pre-wall. This considerably facilitates interventions on this new insulating wall, especially when it comes to making a groove or drilling a hole

  intended to receive a fixing member or the like.

  In addition, the manufacture of such a pre-wall involves an adjuvant whose functions, quantities and conditions of incorporation into the hydraulic mixture, make it possible to control the segregation of the latter so that the structure of the wall, after drying, remains homogeneous both on the walls

between them.

  It will also be noted that the use of ice water and / or compliance with a precise drying cycle for the mixture and / or the use of fibers advantageously makes it possible to reduce the shrinkage of the material and, consequently, reduce or even eliminate the

cracking phenomenon.

  Other objects and advantages of the present invention

  will appear during the description which follows relating to

  to embodiments which are given only by way of examples

indicative and not limiting.

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  Understanding this description will be facilitated by

  Referring to the attached drawing in which: - Figure 1 is a schematic perspective view of an insulating wall according to the invention; - Figure 2 is a schematic and detailed view of a wall of such a wall in contact with a filling insulating material

the spacing between two walls.

  The present invention relates to the field of manufacturing insulating walls intended to be transported and installed on the construction site of a building or the like, in particular

of a house.

  If, in the following description, it will be more

  in particular, refers to an external type wall intended to delimit, externally, such a building, the present invention is in no way limited thereto and also relates to an internal type wall, placed inside said building, and able to define,

  depending on the case, a load-bearing wall or a partition.

  As visible in Figure i of the accompanying drawing, such a wall i has a certain thickness 2 and generally comprises two walls 3, 4 including an internal wall 3 and an external wall 4 which, for example with reference to a wall external type 1, are oriented inward and outward, respectively

of said building.

  Said internal 3 and external 4 walls are arranged opposite one another and in a substantially parallel manner. These two walls 3, 4 each have a certain thickness 5, 6 and are arranged at a distance 7 from one another so as to

  define a spacing between them 8.

  In this spacing 8 extend suitable connecting means 9

  in connecting said walls 3, 4 together.

  According to a first characteristic of the present invention,

  said wall 1 has a thickness 2 of less than 40 cm.

  In such a case, said internal 3 and external 4 walls each have a thickness 5, 6 of between 4 cm and 10

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  cm knowing that good results are obtained for a thickness 5,

6 of 6 cm.

  According to a first embodiment of the present invention, these walls 3, 4 are of the insulating type and are obtained from a hydraulic mixture which, per m3, contains: - at least 250 kg of cement; - at least 250 liters of air trapped by means of particles 10 of an insulating material; - an adjuvant capable of coating said particles 10 with insulating material and whose mass is, relative to that of the cement, at least equal to 0.4%; - water in quantity such as the ratio, by mass,

  water / cement is between 0.2 and 0.5.

  With regard to said particles 10 of insulating material, the latter can, according to a first solution, be defined by particles of solid types. The latter are then made of a synthetic material of the expanded type, in particular polystyrene or the like, and adopt, for example, the form of beads. Another solution consists in incorporating, in said hydraulic mixture, particles 10 of insulating material taking the form of hollow particles. These are delimited by a glass envelope, synthetic or other material, this

  envelope being, for example, spherical in shape.

  Finally, a last solution consists in using particles 10 defined in a porous material of the rock type.

volcanic or the like.

  In fact, if the minimum volume of air trapped via said insulating particles 10 is 250 1 / m3, the maximum volume of air trapped is of the order of 900 1 / m3 knowing that good

  results are obtained for 800 1 / m3.

  It should be noted that it is already known to incorporate insulating particles, in particular in the form of polystyrene beads, in a cement-water mixture. In fact, in this state of the art and during such incorporation, the

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  grains of cement are arranged in the form of strings connected, at one of their ends, to a particle and moving away from the latter. The presence of these strings causes repulsion of the insulating particles which ultimately results in a phenomenon of segregation of the hydraulic mixture. In order to remedy this problem, an adjuvant capable of coating said particles 10 of insulating material is incorporated into the hydraulic mixture. The presence of this adjuvant enables the laitance of cement to coat said insulating particles 10 in a homogeneous manner and to create a vault effect capable of preventing, or at least significantly reducing, the phenomenon of repulsion between particles 10. This makes it possible to remedy the phenomenon of segregation

of the hydraulic mixture.

  In addition, the presence of such an adjuvant appreciably improves the rheology of the hydraulic mixture, which facilitates, on the one hand, the mixing of the latter and, on the other hand, its implementation,

especially during molding.

  In addition, it will be noted that the fact of adding an adjuvant of this type advantageously makes it possible to increase the resistance of the mixture.

  and, consequently, that of the wall defined later.

  In fact, the mass of this adjuvant, relative to that of cement, is, on the one hand, at least equal to 0.4% and, on the other hand, less than 1%, knowing that good results are obtained for 0.8 %. According to a second embodiment of the present invention, said insulating walls 3, 4 are obtained from a hydraulic mixture which, per m3, contains: at least 250 kg of cement; - inclusions of air bubbles representing a total volume of air of at least 250 liters; - an adjuvant, on the one hand, capable, during its incorporation in said hydraulic mixture, of entraining air in the latter for the creation of said inclusions and, on the other hand, whose volume is at least 0.8 liter per m3 of hydraulic mixture;

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  - water in quantity such as the ratio, by mass,

  water / cement is between 0.2 and 0.5.

  In the latter case, the insulating nature of the hydraulic mixture is given to it by the presence of air bubble inclusions. In general and regardless of the embodiment envisaged, it should be observed that the fact of adding water to cement triggers the hydraulic reaction which causes an increase in the temperature of the hydraulic mixture. Knowing that this mixture is of insulating type, the heat released by the hydraulic reaction is particularly difficult to evacuate which can be detrimental to the quality of said mixture and that of the wall.

subsequently obtained.

  In order to remedy these drawbacks and according to another feature of the present invention, the water intended to be incorporated in the hydraulic mixture is, beforehand, refrigerated. In fact and according to a preferred embodiment, said

  water is icy, at least in part.

  As mentioned above, the hydraulic mixture contains cement, the presence of which is ensured, either individually or in combination with a filling material 11, usually called "filler". Such a filling material 11 is, in fact, constituted by fine particles based on silica, such as slag, ash, smoke or by-products of

combustion.

  In this regard, it will be observed that, in the absence of filling material 11, it is necessary to incorporate at least 350 kg of

  cement, preferably 600 kg, per m3 of hydraulic mixture.

  However, when combining a filling material 11 with such a cement, it is necessary that the mass of this filling material 11 added corresponds to a percentage of 30 to 60% of the mass of cement in the mixture, knowing that good results are obtained when the mass of the cement is equal to

  triple that of the filling material 11.

  l 2795440 In such a case, the presence of cement must be ensured at least 250 kg / m3 knowing that good results are obtained for 450 kg / m3 of cement and 150 kg / m3 of

filling 11.

  Thus, the presence of such a filling material 11 advantageously makes it possible to reduce the quantity of cement necessary for the preparation of the hydraulic mixture and, consequently, to lower

the cost price of the latter.

  In addition to these advantages, the incorporation of such a filling material 11 also allows better control of the heating of the hydraulic mixture and facilitates the implementation.

of the last.

  Another characteristic of the present invention relates to the fact that the hydraulic mixture can be supplemented with fibers,

  more particularly of the reinforcing fiber type 12.

  In this regard, metallic fibers can be used, the presence of which is guaranteed up to at least 25 kg / m3 knowing

  that good results are obtained for 35 to 60 kg / m3.

  It will be observed that these metal fibers preferably have a length of between 20 and 70 mm and that their

diameter is around 0.8 mm.

  We can also use at least 5 kg / m3 of glass fibers knowing that 8 to 10 kg / m3 of these allow

to get good results.

  Obviously, a mixture of these two types of fibers, glass and

  metal, is also possible.

  The addition of such fibers makes it possible, on the one hand, to control the phenomenon of shrinkage of the hydraulic mixture during its drying and,

  on the other hand, to reinforce the mechanical strength of wall 1.

  According to another particularity, the hydraulic mixture is added with sand capable of increasing, on the one hand, its density and,

  on the other hand, the resistance of wall 1.

  This sand is added at a height of 10 to 20 kg / m3, knowing that

  good results are obtained for about 15 kg / m3.

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  As mentioned above, the insulating wall 1, comprising two walls 3, 4 interconnected and obtained from a mixture

  hydraulic described above, can define an internal type wall.

  In such a case, the latter can be installed as is on the construction site of a building. However, in the case of a wall 1 of external type, it is necessary to confer on the latter qualities of insulation suitable for

meet the standards in force.

  For this purpose, after the implantation on site of such an external wall 1, it is advisable to supplement the latter with an insulating material 13, disposed between said walls 3, 4, at the level of

  the spacing 8 residing between them.

  In fact, this spacing 8 is filled, in particular by pouring, using an insulating material 13 produced, at least, from cement, water, an adjuvant, the latter being, as the case may be, able to create inclusions of air bubbles or, if necessary, supplemented

  by particles 10 of an insulating material.

  According to a preferred embodiment of the present invention, the composition of this insulating material 13, that is to say the nature and the quantity of its ingredients, is similar to the mixture

hydraulics described above.

  Thus, said insulating material 13 contains, per m3 of hydraulic mixture: - at least 250 kg of cement; - at least 250 liters of trapped air; - an adjuvant of which either the mass is, relative to that of the cement, at least equal to 0.4%, or the volume is at least 0.8 liters per m3 of hydraulic mixture, this adjuvant being, where appropriate, associated with particles 10 made of an insulating material and capable of trapping air; - water in quantity such as the ratio, by mass,

  water / cement is between 0.2 and 0.5.

  The present invention also relates to a method of manufacturing such an insulating wall i consisting, in a first

  step, to introduce a cement in a mixer.

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  In a second step, water is added to this cement.

containing an adjuvant.

  According to a preferred embodiment, this water is, before its

  incorporation, refrigerated, even glazed, at least in part.

  According to a first embodiment of the invention, said adjuvant is capable of defining inclusions of air bubbles in the hydraulic mixture, while, according to a second embodiment, this adjuvant comes in addition to particles 10 of a

insulating material.

  It will be observed that, when the hydraulic mixture comprises such insulating particles 10, the latter are preferably

  introduced into the mixer before the cement.

  In addition, when the hydraulic mixture contains sand, it is introduced into the mixer and, if necessary, added

  to insulating particles 10, before the introduction of the cement.

  When this cement is completed with a filling material 11, the latter is introduced into the mixer before the cement and,

  if applicable, after sand and insulating particles 10.

  Finally, the first hydraulic mixture thus obtained can also be supplemented, if necessary, with reinforcing fibers 12,

  in particular glass fibers and / or metallic type fibers.

  These fibers 12 are preferably incorporated into the mixture after the

cement and before water.

  This first hydraulic mixture is mixed before it is poured, during a third stage of the

  method according to the invention, in a mold.

  It will be observed that, during these first stages of the process, the materials used are maintained, constantly, with stirring or the like with a view, on the one hand, to ensuring the homogeneity of the mixture

  hydraulic and, on the other hand, to delay the setting of the latter.

  Before or after pouring said mixture into the mold, the connecting means 9 are arranged in the latter. It will be noted that, according to a particular embodiment, such connecting means 9 are capable of defining a frame capable of reinforcing the wall 1. If necessary, said connecting means 9

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  can be completed by such a frame, the latter being arranged in the mold before or after the pouring of the hydraulic mixture. The first hydraulic mixture is then dried in order to define, as the case may be, an external wall 4 or

internal 3 of wall 1.

  It will be observed that, according to a preferred embodiment, this drying takes place in an oven at at least 35 ° C., preferably C, for a period greater than 6 hours, preferably at

less equal to 8 hours.

  A second hydraulic mixture is also produced, similarly to the first and of the same composition. This second mixture is intended to define, after drying, as the case may be, a

internal wall 3 or external wall 4.

  This second hydraulic mixture is, in fact, poured into a mold

  similar to that receiving the first hydraulic mixture.

  After this second pouring, the external wall 4 or internal wall 3 obtained from the first hydraulic mixture is turned over and the means of

  connection 9 associated with it in the second hydraulic mixture.

  Thereafter, said second hydraulic mixture is dried, such drying being able to be carried out, as for the first mixture, in an oven at at least 35 ° C., preferably C, for a duration greater than 6 hours, preferably at

less equal to 8 hours.

  After drying, the wall 1 thus obtained can either be stored,

  either be directly transported to a site.

  After its installation on site, said wall 1, in particular when the latter is of the external type, can be completed by an insulating material 13. The latter is poured into the space 8 existing between the internal 3 and external 4 walls, such a material insulator 13 consisting of a hydraulic mixture such as that described above. Although the invention has been described with reference to a particular embodiment, it is understood that it is not there

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  in no way limited and that we can make various modifications of shapes, materials and combinations of these various elements

  without departing from the scope and spirit of the invention.

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Claims (14)

Claims   1. Insulating wall intended to intervene in the construction of a building, for example a dwelling or the like, and comprising an internal wall (3) as well as an external wall (4), in particular oriented towards the interior and towards the exterior of said building, said walls (3, 4) being, on the one hand, arranged facing one another and in a substantially parallel manner and, on the other hand, connected to each other by means of means connection (9), characterized in that, on the one hand, said wall (1) has a thickness (2) of less than 40 cm and, on the other hand, that said internal (3) and external (4) walls each have a thickness (5, 6) of at least 4 cm and are obtained from a hydraulic mixture which, per m3, contains: - at least 250 kg of cement; - at least 250 liters of air trapped by means of particles (10) of an insulating material; - an adjuvant capable of coating said particles (10) with insulating material and whose mass is, relative to that of the cement, at least equal to 0.4%; - water in quantity such as the ratio, by mass,   water / cement is between 0.2 and 0.5.   2. Insulating wall according to claim 1, characterized in that said particles (10) of insulating material are of the solid type and are defined in a synthetic material of the expanded type, in particular polystyrene or the like, for example in the form of balls.   3. Insulating wall according to claim 1, characterized in that said particles (10) of insulating material are of hollow type and are delimited by a glass envelope, of synthetic or other material, said envelope being, for example, of shape spherical. 4. Insulating wall according to claim 1, characterized in that said particles (10) of insulating material are defined   made of a porous material of the volcanic rock type or the like. 17 2795440   5. Insulating wall intended to intervene in the construction of a building, for example a dwelling or the like, and comprising an internal wall (3) as well as an external wall (4), in particular oriented towards the interior and towards the exterior of said building, said walls (3, 4) being, on the one hand, arranged facing one another and in a substantially parallel manner and, on the other hand, connected to each other by means of means connection (9), characterized in that, on the one hand, said wall (1) has a thickness (2) of less than 40 cm and, on the other hand, that said internal (3) and external (4) walls each have a thickness (5, 6) of at least 4 cm and are obtained from a hydraulic mixture which, per m3, contains: - at least 250 kg of cement; - inclusions of air bubbles representing a total volume of air of at least 250 liters; - an adjuvant, on the one hand, capable, during the production of said mixture, of entraining air in the latter for the creation of said inclusions and, on the other hand, whose volume is at least 0.8 liters per m3 of hydraulic mixture; - water in quantity such as the ratio, by mass,   water / cement is between 0.2 and 0.5.   6. Insulating wall according to any one of claims   above, characterized in that the water intended to be incorporated into the hydraulic mixture is, beforehand, refrigerated and   is preferably frozen, at least in part.   7. Insulating wall according to any one of claims   above, characterized in that the cement can be combined with a filling material (11) consisting of fine particles based on silica, such as slag,   ash, smoke or combustion by-products.   8. Insulating wall according to claim 7, characterized in that the mass of the filling material (11) added corresponds to a percentage of 30 to 60% of the mass of cement in the hydraulic mixture. 18 2795440   9. Insulating wall according to any one of claims   above, characterized in that the mixture comprises reinforcing fibers (12), in particular metallic type fibers and / or glass fibers in quantities, respectively, of at least 25 kg / m3 and 5 kg / m3.   10. Insulating wall according to any one of claims   above, characterized in that the mixture contains a   amount of sand of the order of 10 to 20 kg / m3.   11. Insulating wall according to any one of claims   above, characterized in that the internal (3) and external (4) walls define a space (8) capable of being filled, in particular by pouring, with an insulating material (13) of   composition similar to said hydraulic mixture.   12. Method of manufacturing an insulating wall according to one   any one of the preceding claims, characterized in that   that: - a cement is introduced into a mixer, which incorporates water containing an adjuvant which, as the case may be, defines inclusions of air bubbles or complements particles (10) of a material of insulating type; - Before the introduction of the cement into the mixer, said particles of insulating material (10) are then introduced into the latter, if necessary, followed by sand and then a filling material; - Adding to the cement, before the incorporation of water and the adjuvant, and, if necessary, reinforcing fibers (12); - It ensures the mixing of this first hydraulic mixture obtained before pouring it into a mold; one has in this mold, before or after casting, the connecting means (9); - Ensuring the drying of said first hydraulic mixture in order to define, as appropriate, an external wall (4) or internal (3) of the wall (1); 19 2795440   - A second hydraulic mixture is produced, similarly to the first and of the same composition, intended to define, after drying, as the case may be, an internal (3) or external (4) wall; - This second hydraulic mixture is poured into a mold; - the external (4) or internal (3) wall obtained from the first hydraulic mixture is turned over and part of the connection means (9) are immersed in the second mixture hydraulic;   - drying of said second hydraulic mixture is carried out.   13. A method of manufacturing an insulating wall according to claim 12, characterized in that the water added to the cement is, beforehand, refrigerated, this water being,   preferably icy, at least in part.   14. Method for manufacturing an insulating wall according to one   any one of claims 12 or 13, characterized in that   that the drying of at least one of said hydraulic mixtures is carried out in an oven at at least 35 ° C., preferably 40 ° C., for a period greater than 6 hours, preferably at least equal to 8 hours.