FR2734752A1 - Composite granite, stone or marble and concrete slabs - Google Patents

Abstract

A granite, natural stone or marble slab (1) has grooves (5) made in it of variable depth, width and spacing. A special adhesive film (2) enables perfect adhesion of concrete (3) to the slab. The thickness and resistance of the concrete is variable.

Description

The present invention relates to the assembly of a natural material, granite, stone or marble, in thin thickness and of a variable thickness of concrete in order to make the natural material of thin thickness more resistant according to the desired use, thus forming a composite material
The proportion of aggregates, the granulometry of the aggregates, the quality and the cement dosage of the concrete will depend on the mechanical stresses required according to the specifications of the structure to be produced with the composite material obtained by the invention.

 Natural material, granite, stone or marble from deposits that are increasingly difficult to mine, taking into account the ecology and rampant urbanization, which considerably increases the costs, therefore moderate use.

 The invention overcomes these drawbacks where the natural granite, stone or marble material is used in full mass. The invention makes it possible to use the natural material in thickness 3 to 10 times less, depending on the final destination of the composite product obtained for floor and wall coverings, and any urban road and building works.

 The association of granite, stone or marble and concrete material is achieved by incorporating into a vibrating mold, a thin slice of several m> thick, natural material, at the bottom of the mold. The view side of the product will be against the vibrating table of the mold. The rough side receiving the desired thickness of concrete will be grooved. The main purpose of these grooves obtained by sawing with suitable saw blades is to create a real surface for attaching concrete to natural material. This grooving also eliminates any risk of friction between the two different materials that are the natural product (granite, stone or marble) and concrete. The face of the natural material will be washed of all impurities. A glue film specially adapted for bonding will be applied between the natural material and the concrete.

 Used in urban roads, there may be a risk of takeoff of the two components due to heavy traffic of cars and heavy goods vehicles, either under the action of brakes, or under the heating of the surface layer and present a risk of expansion if the bonding surface is flat and very even, even very clean and well blasted by sandblasting or other.

 The grooves can be of different depths and different widths. The depth-to-width ratio of the grooves will be calculated according to the end use of the composite material obtained. the space between each groove is variable. ranging from 5 ml to a few centimeters. The final destination of use of the composite material will determine the space between each groove.

 Sandblasting will be carried out before bonding in order to accentuate it.

The degree of vibration and the concrete drying time will depend on the total thickness thus obtained, drying can be done in suitable ovens. The shape of the molding or assembly may vary depending on the final shape of the composite material obtained, see the different figures made;
Fig: 1 - 2 - 3 & 4
The thickness of the natural material can vary from one to several centimeters. The thickness of the concrete varies according to the needs of the end use. The finish of the part or parts seen of the natural material, can be in finish: - polished, flamed, bush hammered, smilied, chiseled or any other finish traditionally given to the natural material "granite, stone or marble".

 After turning the composite assembly thus obtained, surface seen above, sawing with a suitable tool makes it possible to obtain all the desired modules according to the technical or architectural design of the structure to be coated, thus obtaining a real natural material, granite , stone or marble on the surface seen.

The accompanying drawings illustrate the invention
Figure -1- represents in section. the composition of the composite material thus obtained.

Figure -2- a schematic section of manufacture
Figure -3- example of an assembly of modules obtained after sawing a large composite surface obtained by assembling natural material, granite. stone or marble and concrete.

 The figure -4 & 5- represents the section in example of modules that can be made.

 With reference to these drawings, the invention makes it possible to obtain any form of composite product, combining the natural material granite, stone or marble and concrete.

 The composite material thus obtained according to the invention allows the realization of any work. teis they could be obtained using natural material, granite. stone or marble, in a traditional way with a considerable saving of natural material.

 The grooving carried out on the interior part (face glued to concrete) of the natural material, accentuates the resistance of the bonding and prevents any risk of friction, therefore of separation of the two parts natural material and concrete.

Claims (4)

 1) Manufacturing device for properly inking the two components forming the composite material thus obtained, characterized by a slab of: granite, natural stone or marble (1) on which are made grooves (5) of depth, of variable width and variable spaces between them.  2) Device according to claim NO characterized by a special adhesive film (2) allowing perfect adhesion of the concrete (3) to the slab of granite, natural stone or marble.  3) Device according to any one of the preceding claims, characterized by a thickness of concrete (3) of variable thickness and resistance.  4) Device according to any one of the preceding claims, characterized in that various assemblies can be produced in Fig 4 & Fig 5.