ES2404887B1 - WRAPPED LOST WINDING FOR VERTICAL ELEMENTS WITH EMBEDDED MESH - Google Patents

Abstract

Lost formwork lightened for vertical elements with embedded mesh, constituted by two sheets of expanded polystyrene (1) to which they have adhered inside during the manufacturing process of the material paths of electro-welded steel (2), joined together by Transverse steel elements (3) incorporating openings or holes (4) through which it is possible to arrange the steel bars, both vertical and horizontal (which are not part of this invention), resulting from a previous calculation structural element. Additionally, perimeter steel fences (5) are incorporated which improve the rigidity and strength of the assembly and in turn serve to make a connection between adjacent panels. This connection is made by electrosoldering or binding of both fences with steel wire (6). # These pieces together form a formal and dimensionally coincident housing with the element to be constructed.

Description

Lost formwork lightened for vertical elements with mesh

embedded.

Object of the invention

The present invention relates to a lightened lost formwork for obtaining elements based on a binder, for example reinforced concrete. The invention is applicable to vertical or inclined elements, whether structural elements such as walls, pillars, footings, or non-structural elements such as partitions and enclosures.

The formwork of the invention is of the type that incorporates expanded polystyrene sheets on its wall and the object of the invention is to achieve a minimum wall thickness, without compromising its mechanical resistance against the radial pressure exerted by the concrete in the moment of pouring inside the formwork.

Background of the invention

Obviously, in order to construct an element based on, for example, reinforced concrete, it is necessary to have a mold or formwork that confers its configuration and dimensions to it, and said formwork must combine two different and complementary characteristics, on the one hand that ensures a perfect surface finish for the element, and on the other, that its cost is low enough to make it profitable to the builder. In the field of lost formwork and when it comes to obtaining vertical or inclined elements, formwork based on metal or phenolic plates are known, with an exterior metal structure that gives rigidity and resistance to the whole. This solution, although functionally valid, is very heavy and implies large assembly and disassembly times, as well as the need to use auxiliary means for its assembly.

Description of the invention

The lost formwork lightened for vertical elements with mesh

embedded that the invention proposes, manages to substantially reduce the

Element weight without compromising its mechanical strength, such as

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previously described, which translates into a reduction

considerable in the assembly times of the element.

More specifically, the formwork proposed by the invention is

constituted by cross-linked expanded polystyrene sheets

defining a hollow interior, coinciding with the element to be obtained, with the

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special feature that expanded polystyrene sheets have

embedded inside, welded steel meshes for this

way to provide the piece with rigidity and mechanical resistance

necessary to resist the radial pressure exerted by the binder in the

moment of pouring inside the formwork lost lightened.

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Being a lost formwork, expanded polystyrene sheets remain

permanently incorporated outside the item you want

build. These expanded polystyrene sheets improve

considerably the thermal and acoustic insulation capacity of

constructed element, this being another advantage of the invention.

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Likewise, applying a heat source to polystyrene sheets

expanded once the used binder has been poured and hardened,

reinforced concrete in most cases, rubs can be made

necessary for the passage of facilities easily, quickly and without generation

of waste

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Description of the drawings

To complement the description that is being made and in order to

help a better understanding of the features of the invention, okay

an example of practical realization of it, is accompanied as part

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member of said description, two sheets of plans in which with character

illustrative and non-limiting has been represented in figure 1 schematically

and in cross section, a lightened formwork made in accordance

for the purpose of the present invention and in figure 2 a

detail of the tie between adjacent panels by the perimeter fence

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embedded that is available.

Preferred Embodiment of the Invention

In view of the figures you can see how the lost formwork

lightened that is recommended is structured from plates of

expanded polystyrene (1) that serve as a waterproof barrier in the context

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formwork, embedded welded steel meshes (2) formed

by steel bars of diameter and separation between the same chords with

the radial pressures that the binder will exert during its discharge into the

interior and that ensure the flatness of the element and some elements

steel crosspieces (3) that join both plates and provide the whole

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of the resistance necessary to keep the inner hollow created invariable

between the plates Also these transverse steel elements (3)

they have built-in openings or holes (4) between which they will be arranged

the necessary corrugated steel bars both vertical and horizontal

(which are not part of this invention) resulting from a previous calculation

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of the structural element.

Additionally, they can be incorporated into the perimeter of the formwork panel

lost lightened embedded perimeter steel fences (5) that improve the

rigidity and resistance of the assembly and in turn serve to make a union between

adjacent panels. This connection is made by electro welding or

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tied both fences with steel wire (6).

It is not considered necessary to make this description more extensive so that

Any person skilled in the art understands the scope of the invention and the

advantages that derive from it.

The materials, shape, size and arrangement of the elements will be

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susceptible of variation as long as this does not involve an alteration in

The essentiality of the invention.

The terms in which this report has been written must be taken 30

always in a broad and non-limiting sense.

Claims (1)

1.-Lightened formwork lightened with embedded mesh for vertical elements, both structural and non-structural elements, such as façade enclosures, interior divisions, foundations, etc. 5 characterized by being made of expanded polystyrene sheets (1) those that have been incorporated into them during the process of material manufacturing two welded steel meshes (2), joined each other by transverse steel elements (3) that incorporate openings or holes (4) through which it is possible to arrange the steel bars 10 corrugated, both vertical and horizontal (which are not part of this invention), resulting from a prior structural calculation of the element. These pieces together form a formal accommodation and dimensionally coincident with the element to be constructed. 2.-Lightened formwork according to claim 1, characterized in that 15 Once the binder has been poured and set, usually reinforced concrete, the expanded polystyrene sheets (1) are permanently incorporated on the outside thereof, providing the assembly with a high capacity for acoustic thermal insulation. 3.-Lightened formwork lightened according to any of the claims 20 above characterized in that the expanded polystyrene sheets (1) allow the realization of pipes, for the passage of the installations, by means of the application of a heat source. 4.-Lightened formwork lightened according to any of the preceding claims characterized by incorporating embedded metal perimeter fences (5) in the perimeter of the panels for joining adjacent panels by means of steel wire or weld.