FR2467184A1 - BUILDING ELEMENT - Google Patents

Abstract

The present invention relates to a building element which has the appearance of a natural stone having a decorative effect. This element comprises a core with a coating, said coating containing particles of natural stone or of an artificial mineral material with a decorative effect, said particles being assembled by an organic binder; the coating contains 2 to 60 parts by weight of graphite, 98 to 40 parts by weight of relatively coarse particles of natural stone or artificial mineral material and 5 to 100 parts by weight of organic binder. Application to the construction or to the facing of buildings.

Description

The present invention relates to a construction element which has

the appearance of a stone

  natural having a decorative effect.

  Natural stone, in the form of sawn or cut plates, fragments or building stones

  tion, is in great demand because of its decorative effect.

  In particular, plates, tiles or slabs of slate or marble are used as tiles, siding or wall coverings. Similarly, granite cut into irregular slabs or brick-shaped is used in the building industry, for example for the construction of walls, as siding or wall cladding,

  for fences or as garden slabs.

  The use of natural stone in the indus-

  building is thwarted by its high price, and also because these materials become products

  rare with the gradual depletion of deposits. In part-

  marble and black granite, which are particularly

  are only available in quantity

limited and are very expensive.

  When we extract and cut natural stone, we get a certain amount of waste

  in the form of small fragments and splinters or

  dre whose value is zero or very low. We tried

  to use this waste by grinding and

  mant, possibly after addition of a binder, to obtain stones or plates of construction. We

  also knows how to apply a coating containing

  particles of natural stone on a core of a material

  cheaper. However, the finished products do not resemble

  generally not to the original natural stone.

  Given the grinding and the binder content, the surface often has a uniform and unattractive appearance

  devoid of any structure and character.

  Natural stone slabs are generally

  very fragile and can easily crack or break during manufacture, transport or

  implemented in the building under construction.

  The object of the present invention is to provide a building element which resembles as much as possible to a natural stone, such as a marble slab, a slate slab or a piece of granite, and which is considerably less expensive than stone. true natural corresponding. The invention also aims to provide a construction element of this kind

  having improved strength, in particular the resistance

  resistance to traction and bending, compared to the

corresponding natural stone.

  The invention thus provides an element of

  truction comprising a core provided with a coating, said coating containing particles of natural stone or an artificially-made artificial mineral material, said particles being held together by an organic binder, said element being characterized in that the

  coating contains from 2 to 60 parts by weight of

  phite, from 98 to 40 parts by weight of relative particles

  of natural stone or artificial material

  and 10 to 100 parts by weight of organic binder

  than. According to the invention, the most preferred composition is 10 to 40 parts by weight of graphite, 90 to 60 parts by weight of natural stone particles or particles of artificial material and 20 to 60 parts by weight.

by weight of organic binder.

  Due to their relatively low content of organic binder and the use of relatively

  coarse mineral type, the surface presents approximately

  the same structure, appearance and character as the corresponding natural stone. The graphite content is essential because the latter, given its structure

  particular crystalline structure, accentuates the structure

  minerals, and the combination of graphite and

  mineral particles gives an attractive decorative appearance

  to the set because of the contrast effect.

  According to the invention, the natural stone particles of the coating are preferably slate,

  marble or granite. These mineral particles, combined

  born with graphite particles, provide products that are hard to distinguish from massive sawn or cut sheets or slate pieces,

marble or granite.

  Another embodiment of the invention employs optionally sintered glass particles

  complexion that can provide special decorative effects.

  Here again, the graphite content leads to an improvement in

  contrasts and gives a beautiful structure. The sintered glass may consist of glass beads or

broken glass.

  The term "relatively coarse particles"

  means particles of such a size as to

  a distinct surface structure visible

  the naked eye. The practical lower limit of particle size

  trie is about 20 um because without instruments the eye

  can not or very poorly distinguish between separate grains

  res of diameter smaller than this size. The mixture may however contain a small amount of fine powder

  particle size less than 20 micrometers without this

  the damage. The upper limit of the size

  particles of the coating is 5000 μm (5 mm). Linen-

  preferred range is 50-1000> um and is particularly preferred.

  a particle size of 50-250 μm. This interval

  nullometric provides the most advantageous decorative effect.

  The preferred ratio of mineral particles

  and the organic binder also provides a

  relief because the amount of binder is too small to give

  a completely smooth and flat surface. This effect of

  relief can be considerably accentuated by the applica-

  coating, especially if it is spreading. Although the content of organic binder is relatively low compared to the mineral particles, said particles are however firmly anchored in

  the coating. Mineral particles are very

  from each other and protect the organic binder

  that against climatic effects so as to ensure

  a great longevity to the whole. -

  It is also convenient that the graphite particles have a particle size of 20-1000 micrometers,

  preferably 50-250 micrometers. Grains of

  phites of this size have crystal faces

  which contribute to the superficial structure de-

Siree.

  Another advantage offered by the addition of

  graphite is that although the solid content is important

  aunt, it is possible to give an appropriate consistency to the

  coating material that is used because of the

  Lubricating properties of graphite. This is important, that

  the coating is formed by spraying or spreading

  is lying. If the particles of matter are made up

  of sintered glass which is ground to the required granulometry

  The sintered glasses normally used in the pottery industry can be used. We can

  use glass particles that are colored

  I want it, for example in red, green, yellow, blue or another color. We can also use

  white opal glass or black glass.

  The invention is not limited to the use of the mineral particles specifically mentioned in

  what precedes. Any type can be used

  mineral particulate matter providing the decorative effect

  desired tif. It is not necessary to use

  the materials separately. Thus it is possible to

  change the particles of several natural stones

  different and / or artificial mineral materials.

  This can give pleasant surfaces that do not resemble

  not to a specific natural stone but have a similar structure and

those of natural stone.

  One of the special artificial mineral materials that can be used in connection with the present building element is glass that is rendered partially or wholly crystalline by a

  heat treatment and then grind it

  desired metrics. As an example of such material,

  one can cite a product that is found in the

  this under the trademark "Synopal".

  The core used for the construction component

  can be made of any material sufficiently

  cheap. According to the invention a convenient material for the core is a shaped article of fired clay, such as brick. This provides an extremely non-market product, especially if the present coating

  is only applied on one or both sides of the brick.

  In another embodiment of the invention,

  tion, the core may comprise a wooden plate,

  asbestos cement, plaster, concrete or

  inorganic or organic alveolar tissue.

  The use of wood, such as a chipboard or chipboard, for the core material gives a material of good mechanical strength so that the product does not split or break easily. Similarly,

  asbestos cement, plaster or stick give

  cheap, good strength products, especially if they are equipped with reinforcements consisting of

  fiberglass or a network or fabric of natural fibers-

  artificial or artificial, such as polyamide and polyester fibers.

  Particularly light products are obtained

  When the core comprises a cellular material, there may be mentioned, for example, polyurethane foam or polystyrene foam. Core material may also be porous or

  alveolar that we find in nature. A good example

  ple is that of mineral vermiculite in the form of

dressed.

  The invention is specified by the following examples:

solvents.

Example 1

  100 g of marble powder (Gris Italia) with a particle size corresponding to 0.074 mm of mesh opening are mixed with 20 g of graphite powder with a particle size corresponding to 0.074 mm of mesh size, and the mixture is stirred in 50 g. After addition of an amine hardener, the mixture is spread on a rough wooden tray, and the coating cures by standing for 24 hours at room temperature. This mass is extremely easy to spread and provides a gray coating that

  when the politic does not differ in particular from the

normal appearance of marble.

Example 2

  100 g of slate powder (blue black) of particle size corresponding to about 0.074 mm of mesh size are mixed with 50 g of powder of

  graphite with a particle size corresponding to 0.074 mm of

  mesh veil. The mixture is then stirred in 90 g of polyurethane by kneading the mixture well. We extend the finished product on a wooden tray and let it

  rest For 8 to 12 hours at 20-30'C.

  After it hardens, grind the surface

  face with an abrasive material of corresponding grain size

  laying at 0.051 mm of mesh opening, then brush the surface with a steel brush and polish it with

  wax. The surface obtained is impossible to dis-

  tap on an ordinary slate board.

Example 3

  The procedure of Example 2 is repeated, but instead of expanding the mixture, acetone is added thereto in order to obtain a viscosity which makes it possible to use it.

  in painting or spraying, possibly mixing

  with a float (bentonite). We spray the

  lange prepared on a wooden tray, and after having let it rest for 8-10 hours at 20-300C the treatment of example 2 is repeated by grinding and brushing

with the same end result.

Example 4

  A mixture of 100 g of granite powder and 50 g of graphite powder, both having a particle size corresponding to 0.074 mm of mesh size, and 85 g of styrene containing liquid polyester containing 2 g, was produced. % benzoyl peroxide

  and a little accelerator. The material is carefully kneaded

  lange and spread it on a wooden tray; after

  drying in a furnace or a heating tunnel at about 800C for 15 minutes we brush the surface with a steel brush, and if the structure of the object looks like granite we can confuse the surface obtained with

granite.

Example 5

  70 g of marble powder and powder are mixed

  of granite or slate powder, all of them having a

  the particle corresponding to 0.074 mm of mesh opening, with polyurethane so as to obtain just a consistency that could be called that of a "dry" charge, then acetone is added in order to obtain the desired consistency to extend,

  to paint, apply small blows or spray.

  After application on a wooden tray and

  the surface is ground and / or brushed, and the surface

  The result obtained is difficult to distinguish from ordinary marble, granite or slate.

Example 6

  A mixture of 100 g of crushed black granite with a particle size of 50-250 microns and 50 g of graphite having a particle size of 50-100 micrometers is stirred in 90 g of polyurethane and diluted with acetone. to get a viscosity making it

clean to the spray.

  While stirring continuously, spray the

  produced on a plasterboard, an asbestos

  cement and a concrete slab, respectively. In all cases the plates obtained closely resemble

to cut granite slabs.

Example 7

  The procedure of Example 6 is repeated except that said coating material is sprayed onto a plate

  of rigid polyurethane foam having a specific weight

  than about 200 kg / m5. The product looks like a

  only cut granite, but it is much lighter

  and yet possesses a very great resistance.

Example 8

  A mixture of 100 g of opaline glass is mixed

  crushed white with a particle size of 20-250 micro-

  meters and 3 g of graphite powder of a

  ticular 50-100 micrometers with 30 g of polyurethane and acetone so as to give just the mixture

  a consistency to extend it.

  This coating material is applied to a

  lateral face of an ordinary brick by means of a wheel

  the water. Hardening of the coating for 8-10 hours at 20-301C gives a brick with a white or gray-white coated surface, but which has a beautiful

  rough structure rich in contrast.

Claims (10)

  1. Construction element comprising a core with a coating, said coating containing particles of natural stone or an artificial mineral material of decorative effect, said particles being joined by an organic binder, characterized in that the coating contains 2 to 60 parts by weight of   graphite, from 98 to 40 parts by weight of   latices of natural stone or artificial mineral material and 5 to 100 parts by weight of organic binder.   2. Construction element according to the   1, characterized in that the coating comprises from 10 to 40 parts by weight of graphite, from 90 to 60 parts by weight of particles of natural stone or artificial mineral material and from 20 to 60 parts by weight of weight of organic binder.   3. Construction element according to the   1 or 2, characterized in that the particles of natural stone in the coating consist of slate, marble or granite.   4. Construction element according to the   1 or 2, characterized in that the particles of artificial mineral material in the coating are   composed of sintered glass possibly stained.   5. Construction element according to one   any of the preceding claims, characterized   in that the core consists of a shaped article   fired clay, for example brick.   6. Construction element according to one   any of claims 1 to 4, characterized in that   that the core consists of a wooden plate, asbestos-   cement, plaster, concrete or cellular material ? / 467184 inorganic or organic.   7. Construction element according to one   of claims 1 to 6, characterized in that the   particles of natural stone or artificial mineral   have a particle size of 20-5000 micrometers, preferably 50-1000 micrometers.   8. Construction element according to the claim   7, characterized in that said particles have a   particle size of 50-250 micrometers.   9. Building element according to any one   conque of claims 1 to 8, characterized in that   graphite has a particle size of 20-1000 micrometers,   preferably 50-250 micrometers.   10. Construction element according to one   one of claims 1 to 9, characterized in that   organic binder is a hardening resin, preferably   a polyester, an epoxy resin or a polyurethane.