Formulation for an acoustic floor covering, interior or exterior floor covering comprising same and method for producing this floor covering

Abstract

The invention relates to a formulation for a floor covering, characterized in that it comprises: • for forming a layer called a screen (II) on the floor to be covered: • at least one chaff (B); and • a composition based on a room temperature curable resin (R1), (B) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R1); • for forming a filling layer (III) on the screen layer (II): • powder (P) of at least one chaff; and • a composition based on a room temperature curable resin (R2), (P) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R2).

Description

FORMULATION FOR AN ACOUSTIC FLOOR COVERING, INTERIOR OR EXTERIOR FLOOR COVERING COMPRISING IT AND METHOD FOR PRODUCING THIS FLOOR COVERING

[0001] The present invention relates to a formulation for producing a floor covering, an interior or exterior floor covering consisting of or comprising this acoustic covering, and a method for producing this floor covering.

[0002] French patent application 2,439,855 discloses a floor covering consisting of an underlay of elastic material coated with a relatively hard surface layer, the two layers being poured on site, the coating layer being sanded after drying. The underlay is made from rubber granules embedded in a prepolymer from the polyurethane family. The surface layer is made of a two-component polyether-polyester / aromatic isocyanate coating. The production of the floor covering consists of: applying rubber granules coated with a prepolymer to the floor and allowing the latter to polymerize; applying a coating to the upper surface of the underlay, said coating hardening by reaction of N=C=O groups on –OH groups; and sanding the upper surface.

[0003] This process has the disadvantage that the rubber dust during the sanding operation generates toxic and allergenic rubber microparticles.

[0004] The applicant company sought to resolve this problem by proposing a flexible floor covering, while retaining, or even improving, the flexible nature of the covering, and taking into account the sustainable nature of the product by using, no longer synthetic rubber, but materials derived from agricultural waste.

[0005] For this purpose, according to the present invention, a floor covering formulation is provided comprising a soft layer of acoustic grid which is made of grain husk embedded in a resin and which is coated with a hard layer made of grain husk powder embedded in a resin. The dust generated by sanding is in this case neither toxic nor allergenic.

[0006] The invention offers the additional advantages that it does not use rubber, such as EPDM and SBR of fossil origin, but cereal chaff from so-called coated cereals, which is a waste that the invention allows to be recycled.

[0007] Furthermore, an acoustic character is provided by the fact that air spaces are formed between the fragments which constitute the cereal bale and which are coated with resin in the part of the coating called "grid" as indicated below.

[0008] The present invention therefore firstly relates to a formulation for a floor covering, characterized in that it comprises: for the formation of a layer called grid (II) on the floor to be covered: at least one cereal bale (B); and a composition based on a resin which can be hardened at room temperature (R1),

[0009] (B) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R1); for the formation of a filling layer (III) on the grid layer (II): powder (P) of at least one cereal husk; and a composition based on a resin curable at room temperature (R2),

[0010] (P) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R2).

[0011] Room temperature means a temperature between 10°C and 30°C.

[0012] The formulation according to the invention may also comprise: for the formation of at least one finishing filling layer (IV): powder (P) as defined above; and a composition based on a resin curable at room temperature (R3),

[0013] (P) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R3).

[0014] “Room temperature curable resin composition (R1, R2 or R3)” means a resin curable at a temperature of 10 to 35°C.

[0015] The cereal husks comprising (B) and (P) may be independently selected from rice, einkorn, millet, rye, buckwheat, oat, wheat, einkorn and sorghum husks and mixtures thereof, the largest dimension of a cereal husk (B) being in particular 1 to 15 mm, and the average dimension of the powder (P) of cereal husk being in particular 50 to 500 µm. The average dimension of the powder particles (P) responds to a granulometric analysis by Mastersizer 2000.

[0016] The compositions based on a resin curable at room temperature (R1), (R2) or (R3) may be compositions capable of flowing to form respectively, after curing, said grid layer, said filling layer and said at least one finishing filling layer, and are chosen independently from: compositions, curable with atmospheric air humidity, based on at least one polyether with silane terminations, which can be combined with at least one polysiloxane and / or at least one co-crosslinker; compositions, curable with atmospheric air humidity, based on at least one polyurethane as a single-component resin; compositions, curable by chemical means, based on at least one polyurea resin resulting from the reaction of a polyaspartic ester or aspartic polyether component and a polyisocyanate hardener component.

[0017] In particular: a polyether with silane terminations can be chosen from those of formulas (2) to (4): (2) (3) (4)

[0018] in which:Z 1 , Z 2 , Z 3 each represent –SiR 3-p 11 (GOLD 12 ) p , with p=0, 1 or 2, notably 0 or 1; and R 11 and R 12 , identical or different, each being a linear or branched C1-C6 alkyl radical;R 6 , R' 6 each represent a divalent alkylene radical, linear or branched, in C1-C6;R 7 , R' 7 each represent a divalent alkylene radical, linear or branched, in C2-C4;R 8 , R' 8 each represent a C5-C hydrocarbon radical 15 , aromatic or aliphatic, linear, branched or cyclic;R 9 , R' 9each represent hydrogen, phenyl, linear, branched or cyclic C1-C6 alkyl or a 2-succinate radical of formula ,

[0019] R 13 being a linear or branched C1-C6 alkyl radical;n1, n2, n3are non-zero integers;m1is zero or a non-zero integer;n1and m1, n2and m2, and n3are such that the weight-average molecular mass of the polyether of formula (2), (3) and (4) respectively is 4000 to 30000 g / mol;

[0020] being in particular that of the formula:

[0021] (2a)

[0022] in which R 6 , R 7 , R 11 , R 12 , n1 and p are as defined above, in particular R 11 and R 12 represent methyl, p is equal to 1, and R 6 is methylene or ethylene or propylene.

[0023] The polysiloxane may be chosen from those having

[0024] units and / or units and / or units ,

[0025] being in particular a condensation polysiloxane of C6H5-Si-(OCH3)3 and CH3-Si-(OCH3)3 or a condensation polysiloxane of C6H5-Si-(OCH3)3, having in particular a weight-average molecular mass of 700 to 2500 g / mol.

[0026] Weight-average molecular masses were measured by size exclusion chromatography against polystyrene standards, in THF at 60°C, flow rate of 1.2 ml / min, with detection by a refractive index detector on a Styragel HR3-HR4-HR5-HR5 column using an injection volume of 100 µl.

[0027] The composition based on a polyether with silane terminations, where appropriate in combination with a polysiloxane, may contain at least one aminosilane co-crosslinker chosen in particular from the silanes of formula (1):

[0028] (R 1 )(R 2 )NR 3 -SiR 4 3-q (GOLD5 ) q (1)

[0029] in which:R 1 and R 2 each represent hydrogen, linear C1-C6 alkyl, branched C2-C8 or cyclic C6-C 18 ; C1-C12 aminoalkyl 12 ;R 3 represents C1-C alkylene 18 ;R 4 and R 5 , identical or different, are each a linear or branched C1-C6 alkyl radical; q is 0, 1 or 2, being in particular 0 or 1, and

[0030] in particular among: aminopropyltrimethoxysilane, aminopropyltriethoxysilane, aminopropylmethyl-dimethoxysilane, aminopropylmethyldiethoxysilane, N-(2-aminoethyl) aminopropyltrimethoxysilane, N-(2-aminoethyl)aminopropyltriethoxysilane, N-(2-aminoethyl)aminopropyltrimethyldimethoxysilane, cyclohexylaminomethyltriethoxysilane, cyclohexylaminomethylethoxysilane, N-cyclohexylaminomethyltrimethoxysilane and N-cyclohexylaminomethylmethyldimethoxysilane.

[0031] The composition based on a silane-terminated polyether in combination with a polysiloxane may comprise:15 to 65 parts by weight, preferably 25 to 60 parts by weight, of said silane-terminated polyether(s);85 to 35 parts by weight, preferably 75 to 40 parts by weight, of said polysiloxane(s);1 to 8 parts by weight, preferably 2 to 6 parts by weight, of said aminosilane co-crosslinker(s),

[0032] the quantity of (A)+(B) representing 100 parts by weight and the quantity of (C) being given per 100 parts by weight of (A)+(B).

[0033] A polyurethane may be a reaction product of a polyether polyol and a hexamethylene disocyanate.

[0034] For the formation of a polyurea, the polyaspartic ester component can be represented by the formula (5):

[0035] in which:r is an integer from 2 to 4;X is an aliphatic remainder; andR 20 and R 21each independently represent an organic group which is inert to isocyanate groups, andthe polyether aspartic ester component can be represented by formula (6):

[0036] in which: t is an integer from 2 to 4; s independently represents an integer from 1 to 5; Z is an aliphatic remainder; R 22 represents C1-C6 alkyl;R 23 and R 24 each independently represent an organic group which is inert with respect to isocyanate groups, or

[0037] by formula (7):

[0038] in which:v is an integer from 2 to 4;u is independently an integer from 1 to 5;Z' represents an aliphatic remainder;R 26 independently represents C1-C6 alkyl;R 27 and R 28 each independently represent an organic group which is inert towards isocyanate groups.

[0039] A composition based on a room temperature curable resin (R1), (R2) or (R3) may further comprise, per 100 parts by weight of said room temperature curable resin, at least one of: at least one anti-termite and insect repellent agent, such as the compound of formula (8):

[0040] in a proportion in particular of 10 to 30 parts by weight;at least one UV stabilizer chosen in particular from hindered amines, benzotriazole, benzophenone and hydroxytriazine, in a proportion in particular of 0.1 to 4 parts by weight;at least one moisture absorber, such as an aluminosilicate, in a proportion in particular of 1 to 3 parts by weight;at least one colorant, in a proportion in particular of 5 to 15 parts by weight;andat least one flame-retardant filler, in a proportion in particular of 0.1 to 15 parts by weight.

[0041] The present invention also relates to a floor covering, characterized in that it comprises successively, starting from the layer applied to the floor: a sub-layer for preparing the floor to be covered; a grid layer resulting from the hardening at room temperature of the mixture (B) + composition based on (R1) applied in layer(s) on the floor to be covered; a layer for filling the upper region of the grid layer (II), resulting from the hardening at room temperature of the mixture (P) + composition based on (R2) applied in layer(s); where appropriate, at least one finishing filling layer (IV), resulting from the hardening at room temperature each time of a mixture (P) + composition based on (R3) applied in layer(s),

[0042] the constituents (B), (P), (R1), (R2) and (R3) and their relative proportions being as defined above.

[0043] The undercoat (I) for preparing the floor to be coated may be a primer layer with a thickness of 100 to 500 µm, said primer being chosen in particular from polyurethanes, epoxies and polyethers with silane terminations.

[0044] Layer (II) has in particular a thickness of 6 to 10 mm after its formation and the filling part which is formed by layer (III) and where appropriate the layer(s) (IV) and of which at least one part occupies the upper part of the grid layer has in particular a total thickness of 500 to 3000 µm.

[0045] Layer (III) or (IV) may have received: in the case of an exterior floor covering, for pedestrian use, a finishing layer (V) consisting of a film (Va) of varnish or paint with a thickness in particular of 100 to 500 µm or a layer (Vb) of a resin composition whose resin has been chosen in particular from those entering into the composition of layer (III), or a layer (Vb) as defined above on which is placed a film (Va) as defined above; and in the case of an interior floor covering, a finishing layer such as layer (V) defined above or a finishing coating chosen from waxed concrete, parquet, linoleum, tiling, textile carpet, stone carpet, polyvinyl chloride covering.

[0046] Shore A hardness according to ISO 868 of layer (III) can be between 45 and 100, in particular between 45 and 85.

[0047] The present invention also relates to a method for manufacturing a floor covering as defined above, characterized in that it comprises the following successive steps: application to the floor to be covered of a primer undercoat (I); where appropriate, leveling with a resin curable at room temperature such as resins (R1), (R2), (R3); mixing of (B) and the composition based on (R1) and, on the primer undercoat once dry and having where appropriate been leveled, spreading of the mixture obtained to form the layer (II) which is caused to dry; sanding of the surface of the layer (II) formed in step c) once the latter is dry; mixing of (P) and the composition based on (R2) and, on the layer (II), spreading of the mixture obtained to form a layer (III) which penetrates into the surface region of the layer (II) and which is caused to dry; sanding of the surface of the layer (III) formed in step (d) once it is dry;mixing (P) and the composition based on (R3), and, on the layer (III), spreading the mixture obtained to form a finishing filling layer (IV); sanding the surface of the layer (IV) formed in step (g) once it is dry; where appropriate, repeating steps (g) and (h) at least once to form an additional finishing filling layer each time; producing a finishing layer or a finishing coating as defined above.;

[0048] The different layers (I) to (IV) can be dried for 24 to 48 hours at 20°C.

[0049] The following Examples illustrate the present invention without, however, limiting its scope.

[0050] In these Examples: the constituents noted GENIOSIL® are those marketed by the Company WACKER CHEMIE AG under the respective names indicated:

[0051] GENIOSIL® XB 502: polyether of formula (2) with m1=0, p=2, R 11 , R12 = methyl, R 6 = methylene, having a weight-average molecular mass of about 8500 g / mol, in a mixture with a condensation polysiloxane of C6H5-Si-(OCH3)3 and CH3-Si-(OCH3)3, with a weight-average molecular mass of about 1900 g / mol, in a weight ratio of 34:66 polyether:polysiloxane

[0052] GENIOSIL® E-10: polyether of formula (2) with m1=0, p=2, R 11 , R 12 = methyl, R 6 = methylene, and a weight-average molecular mass of about 8900 g / mol

[0053] GENIOSIL® GF9: amino-silane co-crosslinker

[0054] GENIOSIL® T: UV stabilizer and moisture absorber. The constituents marked DESMODUR® and DESMOPHEN® are those marketed by the COVESTRO Company under the respective names indicated:

[0055] DESMODUR® XP 2617: NCO-terminated prepolymer based on hexamethylene 1,6-diisocyanate (HDI) and an ether diol: reaction product of an aliphatic polyether polyol and HDI having an NCO equivalent of 336, an NCO content of 12.5% ​​by mass, an NCO functionality of approximately 2.0, an HDI monomer content of less than 0.5% by mass and a viscosity according to ISO 3219 of approximately 4250 mPa.s at 23°C.

[0056] DESMOPHEN® NH 1420: having an amino group functionality of 2.0, an amino group equivalent of 279 and a viscosity according to ISO 3219 of 900-2000 mPa.s at 23°C.

[0057] DESMOPHEN® NH 1720: amino-functional co-reactant for polyisocyanates

[0058] DESMODUR® E 30700: prepolymer containing aliphatic ester groups based on HDI

[0059] DESMODUR® ULTRA N 3900: HDI-based aliphatic trimer, having a solids content of 100% by mass, an NCO content of 23.5% by mass, an HDI monomer content of less than 0.25% by mass, a viscosity of approximately 730 mPa.s according to ISO 3219 at 23°C and an NCO functionality of 3.0-3.5. The other constituents, designated by their trade names, are:

[0060] CARDOLITE NX 2026: purified cashew nut oil marketed by CARDOLITE EUROPE

[0061] RAL 7030 coloring base: coloring agent marketed by HOLLAND COLORS

[0062] TEGO® AIREX 900: organo-modified polysiloxane de-aerator containing fumed silica marketed by EVONIK

[0063] TEGO® AIREX 944: defoamer marketed by EVONIK Company

[0064] Sylosiv® A4: micronized, highly porous, crystalline aluminosilicate, molecular sieve with pore openings of approximately 4Å, moisture absorber, marketed by GRACE Company

[0065] The accompanying drawing schematically illustrates the formation of an acoustic floor covering according to the present invention, by showing four partial vertical sectional views through the covering being formed according to steps a) and c), d), e) and f), and g) and h) as defined in the above description.

[0066] Figures 2 to 7 are photographs of the surface condition of the coating of Example 1 at the following respective steps: end of step c); end of step d); after application of the filling layer, i.e. end of step e); after sanding, i.e. end of step f); after application of the finishing filling layer, i.e. end of step g); and after application of the finishing layer, i.e. end of step j).

[0067] This is a photograph of a plurality of rice husks to show the scale of the photograph. The other photographs in Figures 2 to 7 are to the same scale. The photographs were taken with a 26 mm focal length 1.6 smartphone. Example 1

[0068] In this example, the following resin compositions (R1) and (R2) were used:

[0069] Resin compositionFormation of layer (II)Quantity of constituentsFormation of layer (III) and layer (IV)Quantity of constituentsResin R1GENIOSIL® XB 50266.6 ppGENIOSIL® E-1028.6 ppGENIOSIL® GF94.8 ppDensity*1.10-1.5Viscosity**850-1000 mPa.sResin R2GENIOSIL® XB 502100 ppDensity*1.10-1.5Viscosity**950-1100 mPa.sAdditivesCARDOLITE NX 202619 ppCARDOLITE NX 202620 ppColor base RAL 70309.5 ppColor base RAL 703010 ppGENIOSIL® T1.9 ppGENIOSIL® T2 ppTEGO® AIREX 9001.5 pp

[0070] the quantities of the constituents are given in parts by weight (pp)

[0071] * density at 20°C according to NFT 30.020

[0072] ** viscosity at 25°C using the Elcometer viscometer Steps a) and c)

[0073] Before installation, we ensured that the ambient conditions were as follows: operating temperature: +10°C to +30°C and maximum humidity: 90%.

[0074] On an interior floor to be coated, two successive undercoats of primer (I) were applied with a roller, each formed from the resin composition R1 in Table 1 at a rate of 200g of R1 / m 2 . It was left to harden for 4-5 hours.

[0075] Rice husks of 6.5 to 8.5 mm and the R1 resin composition were added to a vertical shaft mixer and mixed until the rice husk was completely coated by the resin composition and homogeneously. 7 kg of R1 resin was used for 3 kg of rice husk. It was applied using a hand-operated "Flemish" type trowel on the hardened primer undercoats, at a rate of 5 kg of the mixture / m 2 .

[0076] The smoother was regularly passed through a propylene carbonate type diluent to facilitate the spreading and tightening of the rice husk coated with the R1 resin composition. The setting time at 20°C of the R1 resin composition / rice husk mixture was 4-5 hours. Step d)

[0077] After hardening the grid layer (II) thus formed, the latter was sanded using an 80, then 120 abrasive disc and dusted by suction. Step e) and f)

[0078] Micronized rice husk powder (0-300 µm) and the R2 resin composition of Table 2 were thoroughly mixed for 2 to 3 minutes to form a patching mixture in the weight proportions of R2 resin:rice husk powder 100:30.

[0079] The pot life of this pore filler mixture was 20 to 30 minutes.

[0080] It was applied at a rate of 2 kg / m 2 on the previously hardened grid layer (II), in a circular back and forth motion, from front to back, using a rubbing brush. The rubbing brush was held as inclined as possible so that the mixture penetrated the grid to a depth of 1 to 4 mm depending on the "tightness" of the grid. "Tightness" means the size of the air spaces in the grid. The tighter the tightening, the fewer air spaces there will be.

[0081] It was left to harden for 24-48 hours at 20°C.

[0082] The surface of the filling layer (III) thus formed was then sanded using a 120 then 180 abrasive disc, and dust removed. Steps g), h) and j)

[0083] The rice husk powder and the resin composition R2 of Table 1 were again well mixed to form a mixture in the weight proportions resin R2:micronized rice husk powder 100:30 which was applied to the previously formed cured filling layer (III) in the same way at a rate of 0.350 g / m 2 . It was left to harden for 24-48 hours at 20°C.

[0084] The surface of the finishing filling layer (IV) thus obtained was then sanded using a 120 then 180 abrasive disc, then applied using a medium-length pile roller at a rate of 150 g / m 2 of a colorless finishing varnish in two coats with an interval of 24 hours between the two.

[0085] The clear topcoat (V) was a two-component, water-based polyurethane varnish. The varnish chosen will be satin or matte depending on the user's choice. Example 2

[0086] Example 1 was repeated, replacing the rice hulls with einkorn hulls.

[0087] Resin compositionFormation of layer (II)Quantity of componentsFormation of layer (III) and layer (IV)Quantity of componentsResin R1DESMODUR® XP 2617100 ppDensity*1.10-1.5Viscosity**2000-3000 mPa.sResin R2DESMOPHEN® NH 142040 ppDESMOPHEN® NH 172010 ppDESMODUR® E 3070040 ppDESMODUR® ULTRA N 390010 ppDensity*1.10-1.5Viscosity**1000-1200 mPa.sAdditivesCARDOLITE NX 202620 ppCARDOLITE NX 202610 ppColor base RAL 703010 ppColor base RAL 70305 ppSylosiv® A41.5 ppSylosiv® A40.75 ppTEGO® AIREX 9000.5 ppTEGO® AIREX 9000.25 pp

[0088] the quantities of the constituents are given in parts by weight (pp)

[0089] * density at 20°C according to NFT 30.020

[0090] ** viscosity at 25°C using the Elcometer viscometer Steps a) and c)

[0091] Before installation, we ensured that the ambient conditions were as follows: operating temperature: +10°C to +30°C and maximum humidity: 85%.

[0092] On an interior floor to be coated, two successive undercoats of primer (I) were applied with a roller, each formed from the resin composition R1 in Table 2 at a rate of 200g of R1 / m 2 . It was left to harden for 4-5 hours.

[0093] 8-15 mm einkorn chaff and R1 resin composition were added to a vertical shaft mixer and mixed until the einkorn chaff was thoroughly and homogeneously coated with the resin composition. 7 kg of R1 resin was used for 3 kg of einkorn chaff. It was applied using a hand-held "Flemish" type trowel to the hardened primer undercoats at a rate of 5 kg of the mixture / m 2 .

[0094] The smoother was regularly passed through a propylene carbonate type diluent to facilitate the spreading and tightening of the spelt husk coated with the R1 resin composition. The setting time at 20°C of the R1 resin composition / spelt husk mixture is 4-5 hours. Step d)

[0095] After hardening the grid layer thus formed (II), the latter was sanded using an 80, then 120 abrasive disc and dusted by suction. Step e) and f)

[0096] Micronized einkorn hull powder (0-300 µm) and the R2 resin composition of Table 2 were thoroughly mixed for 2 to 3 minutes to form a filler mixture in the weight proportions of R2 resin:einkorn hull powder 100:30.

[0097] The usage time of this mixture was 20 to 30 minutes.

[0098] It was applied at a rate of 2 kg / m 2 on the previously hardened grid layer (II), in a circular back and forth motion, from front to back, using a rubbing brush. The rubbing brush was held as inclined as possible so that the mixture penetrated the grid to a depth of 1 to 4 mm depending on the "tightness" of the grid.

[0099] It was left to harden for 24-48 hours at 20°C.

[0100] The surface of the filling layer (III) thus formed was then sanded using a 120 then 180 abrasive disc, and dust removed. Steps g), h) and j)

[0101] The einkorn husk powder and the resin composition R2 of Table 2 were again well mixed to form a mixture in the proportions resin R2:einkorn husk powder 100:30 which was applied to the cured filling layer (III) formed above, at a rate of 0.350 g / m 2 . It was left to harden for 24-48 hours at 20°C.

[0102] The surface of the finishing filling layer (IV) thus obtained was then sanded using a 120 then 180 abrasive disc, then applied using a medium-length pile roller at a rate of 150 g / m 2of a colorless finishing varnish in two coats with an interval of 24 hours between the two.

[0103] The clear topcoat (V) was a two-component, water-based polyurethane varnish. The varnish chosen will be satin or matte depending on the user's choice.

Claims

– Formulation for a floor covering, characterized in that it comprises:for the formation of a layer called grid (II) on the floor to be covered: at least one cereal husk (B); anda composition based on a resin curable at room temperature (R1), (B) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R1);for the formation of a filling layer (III) on the grid layer (II): powder (P) of at least one cereal husk; anda composition based on a resin curable at room temperature (R2), (P) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R2). – Formulation according to claim 1, characterized in that it further comprises:for the formation of at least one finishing filling layer (IV): powder (P) as defined in claim 1; and a composition based on a curable resin (R3), (P) representing 15 to 50 parts by weight per 100 parts by weight of the composition (R3). – Formulation according to one of claims 1 and 2, characterized in that the cereal husks comprising (B) and (P) are independently chosen from rice, spelt, millet, rye, buckwheat, oat, wheat, spelt and sorghum husks and mixtures thereof, the largest dimension of a cereal husk (B) being in particular 1 to 15 mm, and the average dimension of the cereal husk powder (P) being in particular 50 to 500 µm. - Formulation according to one of claims 1 to 3, characterized in that the compositions based on a resin curable at room temperature (R1), (R2) or (R3) are compositions capable of flowing to form respectively, after curing, said grid layer, said filling layer and said at least one finishing filling layer, and are chosen independently from: compositions, curable with atmospheric air humidity, based on at least one polyether with silane terminations, which can be combined with at least one polysiloxane and / or at least one co-crosslinker; compositions, curable with atmospheric air humidity, based on at least one polyurethane as single-component resin; compositions, curable by chemical means, based on at least one polyurea resin resulting from the reaction of a polyaspartic ester or aspartic polyether component and a polyisocyanate hardener component. – Formulation according to claim 4, characterized in that: a polyether with silane terminations is chosen from those of formulas (2) to (4): (2) (3) (4) in which: Z 1 , Z 2 , Z 3 each represent –SiR 3-p 11 (GOLD 12 ) p , with p=0, 1 or 2, notably 0 or 1; and R 11 and R 12 , identical or different, each being a linear or branched C1-C6 alkyl radical;R 6 , R' 6 each represent a divalent alkylene radical, linear or branched, in C1-C6;R 7 , R' 7 each represent a divalent alkylene radical, linear or branched, in C2-C4;R 8 , R' 8 each represent a C5-C hydrocarbon radical 15 , aromatic or aliphatic, linear, branched or cyclic;R 9 , R' 9each represent hydrogen, phenyl, linear, branched or cyclic C1-C6 alkyl or a 2-succinate radical of formula ,R 13 being a linear or branched C1-C6 alkyl radical;n1, n2, n3are non-zero integers;m1is zero or a non-zero integer;n1and m1, n2and m2, and n3are such that the weight-average molecular mass of the polyether of formula (2), (3) and (4) respectively is 4000 to 30000 g / mol;being in particular that of the formula: (2a) in which R 6 , R 7 , R 11 , R 12 , n1 and p are as defined above, in particular R 11 and R 12 represent methyl, p is equal to 1, and R 6 is methylene or ethylene or propylene. – Formulation according to one of claims 4 and 5, characterized in that the polysiloxane is chosen from those having units and / or units and / or units , being in particular a condensation polysiloxane of C6H5-Si-(OCH3)3 and CH3-Si-(OCH3)3 or a condensation polysiloxane of C6H5-Si-(OCH3)3, having in particular a weight-average molecular mass of 700 to 2500 g / mol. – Formulation according to one of claims 4 to 6, characterized in that the composition based on a polyether with silane terminations, where appropriate in combination with a polysiloxane, contains at least one aminosilane co-crosslinker chosen in particular from the silanes of formula (1): (R 1 )(R 2 )NR 3 -SiR 4 3-q (GOLD 5 ) q (1) in which:R 1 and R 2 each represent hydrogen, linear C1-C6 alkyl, branched C2-C8 or cyclic C6-C 18 ; C1-C12 aminoalkyl 12 ;R 3 represents C1-C alkylene 18 ;R 4 and R 5, identical or different, are each a linear or branched C1-C6 alkyl radical; q is 0, 1 or 2, being in particular 0 or 1, and in particular among: aminopropyltrimethoxysilane, aminopropyltriethoxysilane, aminopropylmethyl-dimethoxysilane, aminopropylmethyldiethoxysilane, N-(2-aminoethyl)aminopropyltrimethoxysilane, N-(2-aminoethyl)aminopropyltriethoxysilane, N-(2-aminoethyl)aminopropyltrimethyldimethoxysilane, cyclohexylaminomethyltriethoxysilane, cyclohexylaminomethylethoxysilane, N-cyclohexylaminomethyltrimethoxysilane and N-cyclohexylaminomethylmethyldimethoxysilane. – Formulation according to one of claims 4 to 7, characterized in that the composition based on a polyether with silane terminations in combination with a polysiloxane comprises: 15 to 65 parts by weight, preferably 25 to 60 parts by weight, of said polyether(s) with silane termination; 85 to 35 parts by weight, preferably 75 to 40 parts by weight, of said polysiloxane(s); 1 to 8 parts by weight, preferably 2 to 6 parts by weight of said aminosilane co-crosslinking agent(s), the quantity of (A)+(B) representing 100 parts by weight and the quantity of (C) being given per 100 parts by weight of (A)+(B). – Formulation according to one of claims 4 to 8, characterized in that a polyurethane is a reaction product of a polyether polyol and a hexamethylene diisocyanate. – Formulation according to one of claims 4 to 9, characterized in that, for the formation of a polyurea, the polyaspartic ester component is represented by the formula (5): in which:r is an integer from 2 to 4;X is an aliphatic remainder; andR 20 and R 21 each independently represent an organic group which is inert towards isocyanate groups, andthe polyether aspartic ester component is represented by formula (6): in which: t is an integer from 2 to 4; s independently represents an integer from 1 to 5; Z is an aliphatic remainder; R 22 represents C1-C6 alkyl;R 23 and R 24 each independently represent an organic group which is inert towards isocyanate groups, or by formula (7): in which:v is an integer from 2 to 4;u is independently an integer from 1 to 5;Z' represents an aliphatic remainder;R 26independently represents C1-C6 alkyl;R 27 and R 28 each independently represent an organic group which is inert towards isocyanate groups. – Formulation according to one of claims 1 to 10, characterized in that a composition based on a resin curable at room temperature (R1), (R2) or (R3) further comprises, per 100 parts by weight of said resin curable at room temperature, at least one of the products among: at least one anti-termite and insect repellent agent, such as the compound of formula (8): in a proportion in particular of 10 to 30 parts by weight;at least one UV stabilizer chosen in particular from hindered amines, benzotriazole, benzophenone and hydroxytriazine, in a proportion in particular of 0.1 to 4 parts by weight;at least one moisture absorber, such as an aluminosilicate, in a proportion in particular of 1 to 3 parts by weight;at least one colorant, in a proportion in particular of 5 to 15 parts by weight; andat least one flame-retardant filler, in a proportion in particular of 0.1 to 15 parts by weight. – Floor covering, characterized in that it comprises successively, starting from the layer applied to the floor: a sub-layer for preparing the floor to be covered; a grid layer resulting from the hardening at room temperature of the mixture (B) + composition based on (R1) applied in layer(s) on the floor to be covered; a layer for filling the upper region of the grid layer (II), resulting from the hardening at room temperature of the mixture (P) + composition based on (R2) applied in layer(s); where appropriate, at least one finishing filling layer (IV), resulting from the hardening at room temperature each time of a mixture (P) + composition based on (R3) applied in layer(s), the constituents (B), (P), (R1), (R2) and (R3) and their relative proportions being as defined in one of claims 1 to 11. – Floor covering according to claim 12, characterized in that the undercoat (I) for preparing the floor to be covered is a primer layer with a thickness of 100 to 500 µm, said primer being chosen in particular from polyurethanes, epoxies and polyethers with silane terminations. – Floor covering according to one of claims 12 and 13, characterized in that the layer (II) has a thickness of 6 to 10 mm after its formation and the filling part which is formed by the layer (III) and where appropriate the layer(s) (IV) and of which at least one part occupies the upper part of the grid layer has a total thickness of 500 to 3000 µm. - Floor covering according to one of claims 12 to 14, characterized in that the layer (III) or (IV) has received:in the case of an exterior floor covering, for pedestrian use, a finishing layer (V) consisting of a film (Va) of varnish or paint with a thickness in particular of 100 to 500 µm or a layer (Vb) of a resin composition whose resin has been chosen in particular from those entering into the composition of the layer (III), or a layer (Vb) as defined above on which is placed a film (Va) as defined above; andin the case of an interior floor covering, a finishing layer such as the layer (V) defined above or a finishing coating chosen from waxed concrete, parquet, linoleum, tiling, textile carpet, stone carpet, polyvinyl chloride covering. - Floor covering according to one of claims 12 to 15, characterized in that the Shore A hardness according to ISO 868 of layer (III) is between 45 and 100, in particular between 45 and 85. – Method for manufacturing a floor covering as defined in one of claims 12 to 16, characterized in that it comprises the following successive steps: application to the floor to be covered of a primer undercoat (I); where appropriate, leveling with a resin curable at room temperature such as resins (R1), (R2), (R3); mixing of (B) and the composition based on (R1) and, on the primer undercoat once dry and having where appropriate been leveled, spreading of the mixture obtained to form the layer (II) which is caused to dry; sanding of the surface of the layer (II) formed in step c) once it is dry; mixing of (P) and the composition based on (R2) and, on the layer (II), spreading of the mixture obtained to form a layer (III) which penetrates into the surface region of the layer (II) and which is caused to dry ;sanding the surface of the layer (III) formed in step (d) once it is dry;mixing (P) and the composition based on (R3), and, on the layer (III), spreading the mixture obtained to form a finishing filling layer (IV); sanding the surface of the layer (IV) formed in step (g) once it is dry; where appropriate, repeating steps (g) and (h) at least once to form an additional finishing filling layer each time; producing a finishing layer or a finishing coating as defined in claim 15.; – Method according to claim 17, characterized in that the different layers (I) to (IV) are dried for 24 to 48 hours at 20°C.

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