FR3089842A1 - METHOD OF MANUFACTURING BY MOLDING A PREFABRICATED CONCRETE ELEMENT HAVING A PHOSPHORESCENT SURFACE - Google Patents

Abstract

The invention describes a method of manufacturing by molding a precast concrete element (6) formed of a concrete matrix (4) having a surface phosphorescent concrete. The method comprising the following successive steps consisting in: a) pressing an adhesive support (1) against at least one wall of a mold (2), so that the support has a visible adhesive surface inside the mold, b ) depositing a phosphorescent synthetic composite (3) on said adhesive support so that the phosphorescent synthetic composite instantly adheres to the visible surface of the support, c) pouring concrete into the mold in order to cover at least said adhesive support. Figure to be published: Fig. 3

Description

Description

Title of the invention: Method of manufacturing by casting a precast concrete element with a phosphorescent surface

Technical area

The field of the invention is that of precast concrete elements.

The invention relates more particularly to a method of manufacturing by molding a precast concrete element formed of a concrete matrix having a phosphorescent concrete surface.

The invention also relates to the use of a precast concrete element obtained according to the method of the invention in the field of building, urban planning, landscaping, interior, or civil engineering.

Prior art

There are today different ways of producing precast concrete elements with a phosphorescent surface.

Most of the time, a layer of phosphorescent resin or phosphorescent paint is applied to the already hardened concrete element. This layer, however, is not completely integral with the concrete matrix and will tend to deteriorate over time.

Also known from document LR2990204 is a method of manufacturing a precast concrete element in which a layer of formwork oil is applied in the bottom of a mold and on which is sprinkled with ultra fine phosphorescent pigments before casting. of the concrete matrix. During casting, the pigments remain trapped in the formwork oil and form a film layer which does not rise in the inner layer of the concrete matrix. Once hardened, the concrete element has a layer of phosphorescent pigments trapped on its surface.

It will be understood that the thin layer of phosphorescent pigments on the surface of the concrete element will be rapidly eroded by rain and friction from users.

It will also be understood that it is impossible to fix phosphorescent pigments on a side wall of the mold, since the layer of formwork oil necessary to adhere the pigments will tend to flow along the walls.

In addition, if the phosphorescent pigments are trapped in formwork oil, the phosphorescent material in the form of synthetic phosphorescent composites of size and weight greater than the pigments will tend to rise naturally in the concrete matrix . The phosphorescent composites will thus be mixed in the very opaque concrete matrix and the phosphorescent effect cannot be observed.

Summary of the invention

The object of the invention is therefore to remedy these drawbacks.

To this end, the invention relates to a method of manufacturing by molding a precast concrete element formed of a concrete matrix having a phosphorescent concrete surface, characterized in that the method comprises the successive stages consisting of:

A) press an adhesive support against at least one wall of a mold, so that the support has a visible adhesive surface inside the mold,

B) depositing a phosphorescent synthetic composite on said adhesive support so that the phosphorescent synthetic composite instantly adheres to the visible surface of the support,

C) pouring concrete into the mold in order to cover at least said adhesive support.

The idea underlying the invention consists in using the fixing properties of the adhesive support to retain the phosphorescent synthetic composite, for example of aggregates or phosphorescent types, against the walls of the mold by preventing them from going up. in the inner layer of freshly poured concrete.

Thus, thanks to the presence of partially encrusted aggregates and protected on the surface, the concrete element will have a rough surface conforming to standards and anti-slip expectations, as for swimming pool copings or shower trays.

It will also be understood that the aggregates will resist friction for a longer time compared to the deposition of a pigment powder due to their significantly larger size. The effect of the erosion of phosphorescent aggregates on the concrete surface is thus reduced compared to surfaces with phosphorescent pigments.

The method according to the invention can also have the following steps consisting in:

- cover the phosphorescent composite fixed on the support inside the mold with a mirror effect paint;

- Use a double-sided self-adhesive film as an adhesive support;

- Use a concrete deactivating paste as an adhesive support;

- cover an adhesive face with a self-adhesive film of a phosphorescent synthetic composite, then press the adhesive face covered with the composite of said self-adhesive film on a free surface of the element of concrete not yet hardened which does not is not in contact with the mold;

- Use a transparent mold;

- unmold the concrete from the mold after hardening;

- Use phosphorescent aggregates and a translucent binder to make the concrete of the concrete matrix.

The invention also extends to a precast concrete element such as a door handle, a switch cover, a swimming pool coping, a footboard, a door bottom, a shower tray, a sign or terminal, buoy, naval and nautical construction elements, surface allowing night marking, obtained with the method according to the invention.

Summary presentation of the drawings

The present invention will be better understood and other advantages will appear on reading the detailed description of the embodiment taken by way of nonlimiting example and illustrated by the appended drawings, in which:

[Fig-1] Figure 1 very schematically shows a step in the manufacturing process by molding of a precast concrete element according to the invention;

[Fig.2] Figure 2 very schematically shows a step in the manufacturing process by molding of a precast concrete element according to the invention;

[Fig.3] Figure 3 very schematically shows a step in the manufacturing process by molding of a precast concrete element according to the invention;

[Fig.4] Figure 4 very schematically shows a step in the manufacturing process by molding of a precast concrete element according to the invention;

[Fig.5] Figure 5 very schematically shows a step in the manufacturing process by molding of a precast concrete element according to the invention;

[Fig.6] Figure 6 very schematically shows a step in the manufacturing process by molding of a precast concrete element according to the invention;

[Fig.7] Figure 7 shows a diagram showing the different stages of the manufacturing process by molding of a precast concrete element according to the invention.

Description of the embodiments

By phosphorescent material is meant any type of material capable of continuously emitting light after being illuminated.

The phosphorescent material used on the surface of the concrete elements comes from ore with phosphorescent property, ground into ultrafine powder, called phosphorescent pigments. For large areas, phosphorescent synthetic composites are preferred since they have larger sizes of up to several centimeters. Today, phosphorescent synthetic composites, such as phosphorescent aggregates, are mainly obtained from glass fragments encrusted with phosphorescent pigments.

In the method according to the invention, it is possible to use pigments, aggregates (corundum, aggregates of tint with a particular shape, etc.) or even phosphorescent objects of all shapes (plate, sphere, etc.). depending on the needs.

The method according to the invention here comprises a first step a), shown in Figures 1 and 7, consisting of pressing an adhesive support 1 against at least one wall of a mold 2, so that the support has a visible adhesive surface inside the mold.

Use will be made, for example, of a double-sided self-adhesive film, a paste for deactivating concrete, a translucent resin or even a silicone gel. These types of support 1 are well suited for fixing composites of all sizes and shapes, in particular the double-sided self-adhesive film and the concrete deactivating paste.

The advantage of the double-sided self-adhesive film here is that it can be quickly detached from the mold 2 in the event of incorrect positioning in order to be repositioned in accordance with the desired pattern, without the need to clean the mold.

The double-sided self-adhesive film also has the advantage of being able to be cut and placed in the desired pattern on all the walls of the mold, namely side walls 2a and / or bottom wall 2b.

The deactivating paste, and by extension the translucent resin or the silicone gel, may in turn be inserted into the smallest recesses of the mold, in particular those which are not accessible with the self-adhesive film.

Concrete deactivating paste, like translucent resin or silicone gel, also has the advantage of being able to be used in a more or less thick layer depending on the size of the composite used. Thus, the larger the composite and / or thickness, the thicker the layer of dough can be, preferably so that the composite is embedded in about a third of its nominal diameter in the deactivating dough layer. .

The method then comprises a step b), shown in Figures 2 and 7, consisting of depositing a phosphorescent synthetic composite 3 on the adhesive support so that the composite instantly adheres to the visible peripheral surface of the support, as c 'is the case with the film or for the concrete deactivating paste.

The phosphorescent synthetic composite 3 can for example be sprayed using a compressed air projection device or simply deposited by hand. Optionally, a delimiting mask can be used to distribute, like a stencil, the phosphorescent synthetic composite 3 at the desired locations on the adhesive support 1.

The fixing of the composite being instantaneous on the support, it will be understood that the concrete can advantageously be poured into the mold directly after depositing the composite.

The mold 2 is then cleaned in an optional step e), shown in FIG. 7, to remove the phosphorescent synthetic composite 3 which has not adhered to the support 1. Thanks to this cleaning, any presence of phosphorescent synthetic composite 3 other than on support 1.

An optional step f), shown in dotted lines in FIG. 7, also makes it possible to cover the visible surface of the support 1 and the phosphorescent synthetic composite 3 with a mirror effect paint. This paint has the advantage of increasing the reflection of the light emitted by the phosphorescent synthetic composite 3.

This step f) is preferably carried out after cleaning the mold 2, but could quite well be carried out before cleaning.

The method then comprises a step c) which consists in pouring a concrete matrix 4 into the mold so as to cover at least the support 1.

Thanks to the adhesive support 1, the phosphorescent synthetic composite 3 (aggregates or phosphorescent objects) will not rise in the internal layer of the matrix 4 of concrete but will remain on the peripheral surface of the matrix 4.

An optional step g), shown in dotted lines in FIG. 7, consists in using a self-adhesive film 5 here single-sided, having its adhesive side previously covered with phosphorescent synthetic composite 3, then pressing the adhesive side of said self-adhesive film on a free surface of the uncured concrete element which is not in contact with the mold 2.

Thanks to step g), the method according to the invention makes it possible to obtain a concrete element 6 with all of its surfaces comprising a phosphorescent synthetic composite 3, that is to say the surfaces side 6a, bottom 6b and top 6c, or even surfaces with more complex geometry.

Once the concrete has hardened, a step d) of demolding is carried out.

Then, if films have been used, they can be removed leaving a phosphorescent surface without residue on the concrete element and if the deactivating paste is used, an additional step of cleaning with water can be carried out to remove the film of deactivating paste formed during the hardening of the concrete so as to reveal the phosphorescent synthetic composite 3.

It is also possible to use a transparent mold, for example made of glass or polycarbonate.

With this type of mold 2 the phosphorescent light emitted by the concrete element 6 will diffuse through the translucent coating while giving it very good protection against erosion.

Thus, thanks to the manufacturing process according to the invention, it is possible to produce concrete elements 6 having large or small phosphorescent surfaces, with aggregates or phosphorescent objects, on all the surfaces of element 6.

Thanks to the method according to the invention, it is also possible to obtain precast concrete elements 6 of the door handle type, switch cover, swimming pool coping, footboard, door bottom, shower tray , sign or terminal, buoy, naval and nautical construction elements, surface allowing night marking, or others.

For certain uses, it is also possible to use a concrete matrix 4 composed of a concrete made from inert material of phosphorescent aggregate type and of a translucent binder of epoxy resin type. The advantage here makes it possible to have a prefabricated element 6 made of completely phosphorescent concrete, both at the surface and at depth.

Claims (1)

Claims [Claim 1] Method for manufacturing by molding a precast concrete element (6) formed of a concrete matrix (4) having a phosphorescent concrete surface, characterized in that the method comprises the following successive steps consisting in: a) press an adhesive support (1) against at least one wall of a mold (2), so that the support has a visible adhesive surface inside the mold, b) depositing a phosphorescent synthetic composite (3) on said adhesive support so that the phosphorescent synthetic composite instantly adheres to the visible surface of the support, c) pouring concrete into the mold in order to cover at least said adhesive support. [Claim 2] A method of manufacturing by molding a precast concrete element according to claim 1, characterized in that it comprises a step f) consisting in covering the phosphorescent composite fixed on the support inside the mold with a mirror effect paint . [Claim 3] Method of manufacturing by molding a precast concrete element according to claim 1 or 2, characterized in that a double-sided self-adhesive film is used as an adhesive support (1). [Claim 4] Method of manufacturing by molding a precast concrete element according to any one of claims 1 or 2, characterized in that a concrete deactivating paste is used as an adhesive support (1). [Claim 5] Method for manufacturing by molding a precast concrete element according to any one of the preceding claims, characterized in that it comprises a step g) consisting in covering an adhesive face with a film (5) of self-adhesive a phosphorescent synthetic composite, then to press the adhesive face covered with the composite of said self-adhesive film on a free surface of the concrete element not yet hardened and which is not in contact with the mold. [Claim 6] Method of manufacturing by casting a precast concrete element according to any one of the preceding claims, characterized in that a transparent mold is used. [Claim 7] Method of manufacturing by molding a precast concrete element according to any one of the preceding claims, characterized in that it comprises step d) consisting in demolding the concrete from the mold after hardening. [Claim 8] A method of manufacturing by casting a precast concrete element according to any one of the preceding claims, characterized in that phosphorescent aggregates and a translucent binder are used to make the concrete from the concrete matrix. [Claim 9] Precast concrete element chosen from a door handle, a switch cover, a swimming pool coping, a footboard, a door bottom, a shower tray, a sign or terminal, buoy, shipbuilding elements and water sports, surface allowing night marking, characterized in that it is obtained with the method according to any one of the preceding claims. 1/3