FR2840632A1 - Lost mold structure, for casting reinforced concrete, is a module with inner/outer skins held apart by a spacer framework of horizontal and vertical members - Google Patents

Abstract

The lost mold structure, as casting modules of concrete or lightweight concrete or an expanding polymer, has at least one outer skin (12) and at least one inner skin (14). The skins are locked together by a spacer framework (24), giving a gap between them using horizontal (24H) and vertical (24V) members. The lost mold structure, as casting modules of concrete or lightweight concrete or an expanding polymer, has at least one outer skin (12) and at least one inner skin (14). The skins are locked together by a spacer framework (24), giving a gap between them using horizontal (24H) and vertical (24V) members. The horizontal members are locked in place at mountings (26) at the skin walls, and with the vertical members. The mold sections can be held together by hinges and the like.

Description

is intended to be implemented in the form of a ceiling.

  i: ELEMENT bE FORMWORK PREFABRICATED LOST, ME) ULE OBTAINED WITH THIS ELEMENT bE FORMWORK AND FRAMEWORK MANUFACTURED WITH THESE

OMC) ULES

  The present invention relates to a prefabricated formwork element lost, a module obtained with this formwork element as well as the frame manufactured with

these modules.

  We know the needs in the building for the realization of specific products in situ, in concrete, in light concrete of the cellular type, in polystyrene or

made of polyurethane.

  If such prefabricated elements in the factory or on the construction site have to present the greatest lightness, they must nevertheless ensure the resumption of the efforts and in certain cases, these efforts are significant. in the case of belt walls

  of a swimming pool, the thrust is very strong, especially if the depth is important.

  We know the traditional techniques which consist in pouring reinforced concrete walls with formwork formwork between which a reinforcement is positioned having the structure and composition adapted to the forces to come and the concrete is laid between the formwork. This concrete is generally exposed so as to remove air bubbles and to densify said concrete. Simultaneously, the vibrations ensure good penetration of the concrete into all parts of the

  formwork and good wettability of reinforcement.

  This technique gives full satisfaction for important works, whose wind costs are high but does not present great flexibility. It is therefore difficult to quickly and inexpensively build a support wall or a

2 2840632

  pool belt wall. In addition, these operations are difficult to carry out by

cold weather and rain.

  This technique remains reserYee of traditional applications on important sites. It is possible, instead of formwork, to use wooden formwork made on site with beams and planks. It is then possible to conform the shapes more easily and to carry out delicate works. We understand, however, that such implementations are long, delicate and cannot be

considered industrial.

  Another technique consists in making walls in bricks, in cellular concrete blocks or in concrete blocks bound to the mortar then to introduce in vertical reserves, reinforcements and concrete to improve the resistance of

  ['together by constituting posts.

  Chaines then allow the horizontal connection of the posts made.

  However, such manufacturing does not allow the resumption of significant mechanical efforts. It is therefore difficult to build a support wall or

  a pool belt that way.

  There is a strong demand on the construction market for a formwork device for prefabricated elements to be finalized on site and with high mechanical strength. This type of device must be light to facilitate transport, or even compact. As for its price, it must be reduced and its stake

  in work must also be very fast to reduce the duration of the site.

  Similarly, a certain flexibility would allow conformations with a

  possibility of curvature, useful for certain works.

  It is also known that the manufacture of reinforcement is long and that the different irons must be linked to each other to respect a given geometric. Reinforcement of the prefabricated element according to this

  invention should be simple to implement.

  Another constraint is generated by the filling material which can be concrete, lightened concrete, polystyrene, in the form of bonded beads without solvent or polyurethane in the form of foam when the resistance sought is

  less but with better thermal insulation.

  The formwork according to the present invention allows adaptability to these various

  materioux, and in particular the manufacture of blocks.

  When several wind shuttering elements used for the realization of a work with several modules, it is also provided for links by cha ^ 'chaage

these modules.

  The present invention is now described in detail, according to a particular, nonlimiting embodiment, with reference to the accompanying drawings in which the different figures represent: - Figure 1A, a perspective view of part of a formwork element according the present invention, with cellular skins, - FIG. 1B, a top view of this same part of the formwork element, - FIG. 2A, a perspective view of a part of a formwork element according to the present invention, with full skins, - Figure 2B, a top view of this same part of the shuttering element, - Figure 3, a perspective view of two skins and a connecting rod, - Figure 4, a view of 'a connecting rod with spacer stiffeners, - Figure 5A, a view of a variant with double reinforcement, in the horizontal plane, - Figure 5B, a view of a variant with double reinforcement, with opening angle, - Figure 6, a perspective view of a spacer and a receiving face n, and l - Figure 7, a perspective view of a formwork element according

  ['invention with integrated chain means.

  In Figures 1A and 1B, there is shown a formwork element 10 according to the present invention. This detail view allows you to understand all the details of the assembly. This formwork element comprises two skins, one 12 outside and the other 14

inner city.

  These skins are made of a material of the type of grooves 16. In these cases, these grooves are oriented vertically. To give an order 0 of idea of dimensions, without this being of course limiting, we use exterior and interior skins of 6 to 10 millimeters with square grooves of side substantially equal to the thickness, thickness near the sheets 18 external

and 20 internal of each of the skins.

  These skins define the facings of each find module as will be explained later. The dimensions of these skins correspond either to the dimensions of the entire work if it is small, 3 meters by 6 meters to indicate non-limiting values, or to standard dimensions, for example 1 meter per

  1 meter or 50 centimeters when it comes to modules linked to each other.

  t) in all cases, the formwork element comprises means 24 for connecting the

  two skins, defining a free space.

  In the present case, the wind connection means 24 composed of 24H reinforcement horizontal connection from one skin to the other and 24V vertical locking reinforcement. 24V horizontal reinforcements present in the

  realization represents sinusodal forms.

  Each skin is provided with blind 26 housings, housed in the thickness of each skin. In this case, each internal sheet 20 is cut while

  each outer sheet 18 remains integrated.

  r r 2840632 These housings have dimensions and a positioning such that each vertex of sinuso''de reinforcement 24H horizontol corresponding penetrates into said housing. The 24V vertical reinforcements wind rods 28 of dimensions adapted to penetrate into the grooves of each of the skins. Each rod is introduced into a groove which passes through a blind housing 26 to immobilize each

  top of the sinusoid in said blind housing.

  This is particularly visible in Figure 1B.

  It should be noted that the fluted plates as described may be replaced by plates of solid material such as polyurethane, polystyrene, or cellular concrete. In this case, it is necessary to plan in manufacturing

  reserves for the passage of the rods.

  In FIGS. 2A and 2B, the references are kept because it is the same arrangement but with skins made of solid and curved material, difficult to pierce or of small thickness. in this variant, the housings 26 vent through because it is difficult and

  therefore expensive to make blind dwellings.

  The tops of the sinuses then cross the skins and protrude on the outside. The rods of the 24V vertical reinforcements cannot be introduced into grooves, these are placed outside, against the sheet 18

  external, inside the sinusoidal curvature.

  be so as to maintain the skins relative to the holding means, it is provided in this variant, internal stops 30. in this example, these wind rods 31 attached to the horizontal 24H reinforcement by any means such as welding points, identical to those which are produced for the trellises commonly used in the building, or ligatures using wire of iron,

  also well known in the building industry.

  The skins are thus perfectly braced, quite regularly.

  When it is desired to juxtapose formwork elements, it is necessary to provide profiles 32 for joining the skins. Such profiles can also be used to make formwork complements in order to follow profiles not necessarily of regular or standard dimensions. These profiles are positioned vertically and horizontally, as required. In fact, in industry, fluted or solid panels in which wind

  made of the skins, necessarily have standardized dimensions.

  be such profiles advantageously wind in H in order to receive between the two pads 32-1, 32-2 of branches, the thicknesses of the skins. A mode of realization

is shown in Figure 3.

  be even, it may be necessary to have stiffeners 34.1) in some cases and for certain dimensions, it is indeed useful to provide additional support in one direction. To this end, a U-shaped stiffener 34. with one of the branches slightly folded inwards towards said stiffener,

is shown in Figure 4.

  One 36 of the wings of this stiffener is housed under one of the branches of the padres 32-1 or 32-2 of the H-profile, which facilitates installation and makes it possible to strengthen the connection between two plates, since there is no no 2411 reinforcement in this location, since it is impossible to make blind or through housings. In order to ensure suitable maintenance, spacers 38 are provided which link each stiffener arranged against the internal sheet 20 of one of the skins with

  the stiffener has against the internal sheet 20 of the other skin 14.

  The fixing of these spacers on the stiffeners is advantageously carried out

by prior welding.

  It is also noted that these stiffeners can be curvilinear in order to conform to the

  skins and allow a certain freedom of shape.

7 2840632

  In FIG. 5A, a variant has been presented in which the horizontal 24H double wind reinforcements, arranged in the same plane, with 24V reinforcements introduced between the vertices of the sinusodes, substantially in the median plane

between the skins.

  Another variant in FIG. 5B shows double horizontal 24H reinforcements also, with parallel sinusodes, connected by their vertices,

  on one side, forming an opening angle in the vertical plane.

  This arrangement avoids the displacement of the skins vertically, one by

compared to the other.

  It is also possible to carry out volume separations within the same formwork element using partitions 40. An example is given in FIG. 6, the partition comprising tenons 42 provided for entering housings 26

  blind but oriented vertically, in the direction of the grooves.

  In the case of full skins, the holes would be through.

  The partitions can be assembled by screwing. These partitions can also support additional reinforcements, arranged in the volume defined by the two skins and for this purpose, they are provided with cutouts adapted to receive them. The partitions can advantageously be made in the same material as the skins but depending on requirements, the thickness can be increased to

  provide filling or manage a part without filling material.

  These described elements are thus pressed to be placed on the place of realization

of a work.

  When you want a pour with a high volume of concrete, the recovery of

  efforts at the bottom of the formwork on the skins are provided by the partitions.

  The implementation of such a formwork element is very simplified.

  The operator disposes of the formwork elements or the elements on the place provided for this purpose. The operator then ensures the connection of the various elements, if necessary, relic the skins thanks to the H-shaped profiles and positions the stiffeners in the places that require it. It can introduce additional rods 28 into the grooves, these rods having a long length extending from one skin of one formwork element to another. Once the formwork has been completed, the find module can be obtained by courage from a filling material such as ordinary concrete, lightened concrete, comprising balls of expanded material, wood for example, or even polymeric expanded materials such as polystyrene or polyurethane to achieve

  factory of independent modules to assemble.

  means of assembling wind modules presented in FIG. 7.

  bans the embodiment of Figure 7, it is provided reserves in the form of tubes 46, forming a network after assembly of the modules together. It is possible to place rods 48 of concrete reinforcement in these tubes which

  act as guides. These reinforcements provide the connection between the modules.

  It is also noted in the case of the arrangement of the formwork elements with solid skins, that the 24H reinforcements have protruding vertices, which can facilitate the gripping and the handling of the front formwork elements

  and / or after manufacture, in the factory or on site.

  The connecting means 24 have been presented according to an embodiment

  particularly with reinforcements of the round section concrete iron type.

  However, other sections can be used as needed or

Availabilities.

  These 24H horizontal reinforcements can be replaced by perforated, metallic or synthetic material plates, in expanded metal, without

  to change the spirit of the present invention.

  It may be noted that the formwork elements according to the present invention are easily transportable, even prefabricated, since the fastening allows the skins to move towards each other, the horizontal reinforcements forming a hinge with respect to the skins. This considerably limits the

  volume. Only the variant of FIG. 5B does not provide this advantage.

  As for the weight, it is extremely reduced by the design itself and by the materials used. Using such formwork, very resistant reinforced concrete frames are obtained from light and insulating modules, without mounting a frame.

formwork.

Claims (11)

REVENbICATIONS   1. Formwork element lost for the realization of modules in particular in concrete, lightened concrete, polystyrene, polyester, characterized in that it comprises at least one skin (12) outside, a skin (14) inside and means   (24) connecting these two skins leaving a space.   2. Formwork element lost according to claim 1, characterized in that the wind connection means of the reinforcement (24H) horizontal and vertical reinforcement (24V).   3. Lost formwork element according to claim 2, characterized in that the horizontal reinforcements (24H) have parts intended to cooperate   0 with housings (26) and with vertical reinforcements.   4. lost formwork element according to claim 3, characterized in that the skins (12,14) comprise blind housings (26) and grooves   designed to receive the reinforcement (24V).   5. lost formwork element according to claim 3, characterized in that the skins (12,14) are full and include housings (26) through, the reinforcements (24H) projecting outside the skins in   sort of receiving the vertical reinforcement (24V).   6. Formwork element lost according to resells i cation 5, characterized in that   the reinforcements (24H) include stops (30).   7. Formwork element according to any one of claims   previous, characterized in that it includes junction profiles (32) skins.   8. Formwork element according to any one of claims   previous, characterized in that it is provided with stiffeners (34).   9. Formwork element according to any one of claims   above, characterized in that it comprises tubes (46) intended for   receiving reinforcing rods (48).   10. Module obtained from a formwork element according to any one   of the preceding claims, characterized in that it receives a   composition of ordinary concrete, lightened concrete, comprising balls of expanded material, wood, or even polymeric expanded materials such   than polystyrene or polyurethane.   11. Framework obtained from modules produced according to claim 10.