Cements; concrete; artificial stone; ceramics; refractories (C04)

(54409)

C04

Cements; concrete; artificial stone; ceramics; refractories

(4807)

C04B - Lime; magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics (devitrified glass-ceramics c03c0010000000); refractories (alloys based on refractory metals c22c); treatment of natural stone

(4807)

	Photocatalytic composite materials containing titanium and limestone Invention relates to photocatalytic materials for use in cement. The novel photocatalytic product contains a titanium compound in crystalline phases: CaTi2O5 and/or CaTi5O11, as well as TiO2, integrated with limestone. The product is obtained by reacting limestone with a suitable titanium dioxide precursor in a basic solution, followed by thorough washing of the obtained solid product, drying and calcination at 450-700°C.
	Raw mixture for expanded clay manufacturing Raw mixture for manufacture of expanded clay contains the following components, wt %: montmorillonite clay 84.0-88.0, stillage of wine and cognac production 0.7-1.1, kaolin 0.7-1.1, small quartz sand 7.0-9.0, pegmatite 3.6-4.8.
	Pcd diamond Invention relates to PCD diamond to be used in production of water-jet ejectors, engraving cutters for intaglio, scribers, diamond cutters and scribing rollers. PCD diamond is produced by conversion and sintering of carbon material of graphite-like laminar structure at superhigh pressure of up to 12-25 GPa and 1800-2600°C without addition of sintering additive of catalyst. Note here that sintered diamond grains that make this PCD diamond feature size over 50 nm and less than 2500 nm and purity of 99% or higher. Diamond features grain diameter D90 making (grain mean size plus grain mean size × 0.9) or less and hardness of 100 GPa or higher.
	Fire-retardant composition Invention relates to building materials and can be used in applying fire-retardant coatings on building structures. The fire-retardant composition in form of a water-tempered dry mixture for applying coatings is characterised by that it contains, wt %: portland cement 20.0-60.0, expanded vermiculite 10.0-40.0, chrysotile asbestos 5.0-25.0, chamotte 5.0-25.0, expanded pearlite 10.0-30.0, polyfunctional concrete modifier 0.1-1.0, fine water-soluble adhesive 2.0-8.0 and a water-retaining additive 0.1-3.0.
	Crude mixture for making ceramic wall articles Crude mixture for making ceramic wall articles contains gas cleaning dust from production of ferroalloys containing, wt %: SiO2 - 61.49-79.58 and MgO - 1.58-3.57, carbonised loam and high-calcium fly ash from burning brown coal, with the following ratio of components, wt %: gas cleaning dust from production of ferroalloys - 66-68; fly ash from burning brown coal - 3-7; carbonised loam - 27-29.
	High-strength magnesium silicate proppant obtaining method High-strength magnesium silicate proppant obtaining method that includes milling of the source mixture, its granulating and annealing of the obtained granules, milling of the source mixture with MgO content equal to 24-28 wt % is made up to the particle size of 8 mcm and less, and granulation process is made with water with added sodium or potassium salt of naphthalenesulphonic acid polymethylene or polycarboxymethylene of a sulphonic acid in quantity 0.02-0.07% of the mixture weight in terms of solid matter. The invention is developed in the secondary claims.
	Bitumen-concrete mixture on nano-modified binder Bitumen-concrete mixture contains crushed rock, sand and oil bitumen BND 90/130, nano-modified with a mechanically activated mixture of rubber crumbs with an additive, where the bitumen is modified using rubber crumbs with size of 0.25 mm and the additive is natural zeolite, with the following ratio of ingredients, wt %: said bitumen 93.0 of the weight of the rubber-bitumen mixture, said crumbs 7.0 of the weight of the rubber-bitumen mixture, natural zeolite 2.0 of the weight of the rubber crumbs.
	Sulphur concrete composition Composition for sulphur concretes, which contains sulphur gas and fuel oil; in addition, it contains waste and recovered proppant in the form of granulated aluminosilicate granules with the size of 0.2-2 mm and a polymer additive - crushed secondary wastes of polyethyleneterephthalate at the following component ratio, wt %: sulphur gas - 11-21, fuel oil - 3.85, polymer additive - 0.15, and proppant - 75-85.
	Composition for producing heat-resistant composites Composition for producing fire-resistant composites, which contains spent catalyst IM-2201, crushed rock, sand and H3PO4, further contains slag from smelting extra-low-carbon ferrochrome containing, wt %: SiO2 - 5.8; Al2O3 - 54.8; Fe2O3 - 1.88; CaO - 13.2; MgO - 14.8; Cr2O3 - 5.4; R2O - 2.3, with the following ratio of components, wt %: spent catalyst IM-2201 10-15, crushed rock 33-40, sand 10-13, orthophosphoric acid H3PO4 10-15, slag from smelting extra-low-carbon ferrochrome 24-30.
	Method of producing cordierite mixture for technical ceramics Cordierite mixture can be used to produce insulators, supports for catalysts for cleaning internal combustion engine exhaust gases, in water filters, ceramic articles for calcining furnaces etc. In the disclosed method, the sillimanite mineral used is an enriched sillimanite concentrate containing 10-15 wt % quartz, which is mixed with talc in ratio of 1:(0.7-0.9) wt %. The obtained raw mixture is ground and activated in a flow-type centrifugal disc mill, which provides mechanical action on the mixture with a centrifugal force of 50-60 g, and dwell time of the mixture in the treatment zone of 2-5 minutes. The raw mixture treated in the mill is calcined at temperature of 1200-1300°C for 1-2 hours.
	Raw mixture for manufacture of brick, stones and roof tile Invention relates to compositions of raw mixtures that can be used for manufacture of brick, stones and roof tile. Raw mixture contains the following, wt %: blow sand 60.0-65.0; bentonite 13.0-16.0; crushed glass 2.0-6.0; crystalline silicon production wastes 16.0-22.0.
	Raw mixture for manufacture of foam concrete Raw mixture for manufacture of foam concrete contains the following components, wt %: Portland cement 35.0-37.0, foaming agent PB-2000 0.25-0.35, TPP ash 15.65-20.25, crushed foamed glass with particle size of 5-10 mm 20.0-25.0, asbestos fibre cut into 5-15 mm pieces 1.0-1.5, and water 21.0-23.0.
	Cement using industrial production wastes Its main component - clinker is obtained at decreased power costs, i.e. at the temperature that is lower than production temperature of Portland cement clinker from natural raw material (limestone+clay), owing to adding to composition of its flux flow charge in the form of metalware production waste and thermally activated aluminosilicate component - burnt rock. One and the same raw material is included both in cement composition and in clinker composition - and this is burnt rock. Composition of the supposed cement is as follows, wt %: burnt rock 5-80%; product of coke and by-product processes 4-6%; clinker is the rest. Composition of clinker for the proposed cement, wt %: burnt rock 22-24%; waste of metalware production processes 4-6%; limestone is the rest.
	Proppant and its application Proppant produced from kaolin of Nizhne-Uvelskoe deposit represents sintered annealed ceramic pellets of 0.15-2.0 mm mean size, bulk density of 1.35-1.47 g/cm3 and specific weight of 2.37-2.49 g/cm3. It containing the following substance at the following ratio, in wt. %: aluminium oxide 17.00-29.00, silicon dioxide 65.00-77.00, calcium oxide 0.20-0.39, chromium oxide 0.03-0.0, iron oxide 1.80-4.20, potassium oxide 0.40-0.95, sodium oxide 0.20-0.38, titanium oxide 1.20-2.00, magnesium oxide 0.50-1.00, manganese oxide 0.00-0.01, phosphorus pentoxide 0.00-0.01. Proposed method consists in application of this proppant as a propping agent at oil and gas production intensification by hydraulic fracturing by injection of the mix containing said proppant into productive bed.
	Method of concrete mixture preparation Preparation method consists in that molybdenum scheelite wastes in an amount of 9-10% and an organic substance - crushed corncobs - 7-8% are additionally added to portland cement in an amount of 25-30%, chip 12-15% and sand 15-18% , the rest is water.
	Method for production of ceramics and complex for implementing this method Method for producing ceramics includes moulding of products by the method of semi-dry pressing, their endurance at a workshop temperature, drying by hot heat-carrying medium and burning. In this case the moulded products are placed in cassettes of a lattice structure with gaps relative to each other, endurance and drying of products in the cassettes is performed in series in one drying cabinet of a shaft type. After drying the products in the cassettes are loaded into the open shaft for their normalisation before burning under conditions of the workshop temperature and humidity.
	Method for producing briquettes for drainage system Method for producing briquettes includes preparation of initial materials, mixing, drying and their compacting. In this case, one-dimension gravel of fraction 10-15 mm, which is previously cleaned and dried is taken as the initial materials, and an epoxy compound - as a binder, prepared from the epoxy resin and a hardener in a ratio of 90-94 to 10-6 respectively. Moreover, the initial materials are taken in the following ratio of the components: 93.5-94.5 of pts. wt. of gravel, 5.0-5.85 of pts. wt. of epoxy resin, 0.5-0.65 of pts. wt. of hardener. Then they are mixed, and the finished paste is moulded in moulds and then tamped; the finished briquettes are kept and freed from moulds.
	Composition for production of heat resistant composites Composition for production of heat resistant composites includes a waste catalyst IM-2201, broken stone, sand and H3PO4, additionally contains sludge of a nickel-skeletal catalyst with content, wt %: SiO2 - 5.3; Al2O3 - 26.8; Fe2O3 - 0.8; CaO - 2.9; MgO - 1.3; R2O - 24.74; LOI - 37.1, with the following component ratio, wt %: waste catalyst IM-2201 10-15; broken stone 33-40; sand 10-13; orthophosphoric acid H3PO4 10-15; sludge of nickel-skeletal catalyst 24-30 with content, wt %: SiO2 - 5.3; Al2O3 - 26.8; Fe2O3 - 0.8; CaO - 2.9; MgO - 1.3; R2O - 24.7401; LOI - 37.1.
	Salt-soluble composition of ceramic fibre Invention relates to a composition of a biodegradable ceramic fibre for high-temperature heat insulation. The composition of the biodegradable ceramic fibre for high-temperature heat insulation contains the following components in wt %: SiO2 - 58-67; CaO - 26-34; MgO - 2-8; Al2O3 - 0-1; B2O3 - 0.2-1.1; B2O3+Na2O - 0.3-1.1; admixtures, selected from TiO2 and Fe2O3 - less or equal to 1.
	Method of producing articles from composite materials Invention relates to production of articles from composites with metallic and carbine-metallic matrices and from cermets. Proposed method comprises making the blank of porous heat-resistant material and its 3D metalising at isothermal heater by placing the blank and crucible with metal in retort closed volume, heating, holding in vacuum and cooling. Note here that retort volume is quasi-shaped and/or such volume is created by blank or inside it. Note also that a part of crucibles with metal along with rigging whereat they are arranged features weight larger than that metalised blank while cooling is performed in metal vapours.
	Production of silica-alumina refractory material Invention relates to refractory materials. Proposed method comprises the bringing of laser effects on the surface of said refractory article at the following process parameters: total power of laser beam - 115-680, laser spot sizes on part surfaces - 5-20 mm, laser spot displacement speed - 0.1-10 mm/s, laser wavelength - 9-11 mcm.
	Raw mixture for production of expanded clay Raw mixture for production of expanded clay contains, pts. wt.: montmorillonite clay 93.1-94.6, bard of wine and brandy production 0.7-1.1, shungite ground and sieved through mesh No. 014 - 4.0-6.0, liquid potassium glass with density of 1300-1500 kg/m3 with silicate module 3.6-4 0.2-0.3.
	Mixture for brick manufacture Mixture for brick manufacture contains the following components, pts. wt.: clay 79,8-81,9; zircon 2.5-3.5; halite 0.1-0.2; talc 5.5-6.5; quartz sand 9.0-11.0.
	Charge stock for production of porous aggregate Charge stock for production of a porous aggregate comprises, pts. wt.: montmorillonite clay 89,7-93,8, pyrolusite 6.0-10.0, mineral oil 0.2-0.3.
	Charge stock for production of porous aggregate Charge stock for production of a porous aggregate comprises, pts. wt.: montmorillonite clay 89,0-92,5, peat 1.0-1.5, fine quartz sand and / or fly ash 6.0-10.0.
	Method of obtaining composite material al-al₂o₃ Method of obtaining a composite material Al-Al2O3 relates to a technology of composite materials - cermets and can be used for obtaining sealing elements, applied for tight connection of components and constructions in high-temperature power installations. In accordance with the claimed method an aluminium powder (grade PAP-2) is preliminarily thermally processed in air to remove stearine from the surface of its particles. After that, it is granulated by mechanical processing in a planetary mill for 15-180 minutes with a ratio of the powder weight to the weight of hard alloy spherical bodies from 1:20 to 1:25, thermal processing of the filler from the granules was performed in vacuum at a temperature of 500-600°C for 45-60 minutes with further pressing of the blank under pressure 400-600 MPA. The obtained blank was heated by an air heat carrier up to a temperature of 550-600°C to initiate the process of self-propagating high-temperature synthesis (SHS) with further isothermal exposure for 30-60 minutes and cooling of the heated product in air at room temperature.
	Composition for manufacturing heat resistant composites Composition for manufacturing heat resistant composites includes a waste catalyst IM-2201, broken stone, sand and H3PO4, additionally contains slag from ferrotitanium smelting with content, wt %: SiO2 - 2.5; Al2O3 - 72.18; TiO2 - 10.3; Fe2O3 - 0.34; CaO - 11.4; MgO - 3.5 with the following ratio of components, wt %: waste catalyst IM-2201 10-15, broken stone 33-40, sand 10-13, orthophosphoric acid H3PO4 10-15, slag from ferrotitanium smelting 24-30.
	Raw mixture for production of porous aggregate Raw mixture for production of a porous aggregate contains, pts. wt.: montmorillonite clay 72.0-74.0, kaolin 3.0-5.0, kyanite 8.0-10.0, fly ash 13.0-15.0.
	Production of high-strength high-early-strength alite portland cement and production line to this end Invention relates to production of high-strength and high-early-strength alite Portland cement. Stock with high content of CaCO3, 92-98% and quartz sand with silica content of 92-98 is fed. Note here that every said component gets to its processing line. Said production line comprises limestone or chalk screen to separate to 600 mm lumps and 25 mm lumps, hammer two-rotor crusher to grind the lumps to 25 mm fraction with grinding factor of 15-20. This comprises tank with 25 mm fraction of CaCO3 to be subjected to preliminary drying. Similarly, in the case of quartz sand, vibrating screen for separation of impurities are used as well as sand tank. Every line for CaCO3 and sand is equipped with two drier drums, two ball mills to grind to 0.01 mm fraction with drying to 0.5% moisture content, two mills to grind to particle size of 1 mcm and two service bins. Limestone or chalk and quartz sand are fed from the bins via batchers for annealing separately in annealing ducts and mixed in zigzag channels. Swirling gas flow of calcium oxide mixes said calcium oxide with annealed sand falling from above at smaller speed onto has flow with calcium oxide to produce required calcium oxide-to-silica ratio of 3:1 required for alite formation. Produced mix at 1450-1480°C gets into hot forming press. In every pressing cycle of 20 s 30 mm thick 500 mm diameter plate of clinker is produced. Downstream of refrigerator chamber clinker plate at 50°C is fed into hammer crusher and, then to grinding mill to be ground to 0.01 mm fraction and jet grinder for grinding to 0-30 mcm fraction, Portland cement with content of alite of 70-90% is thus produced.
	Raw mixture for production of facade plates Invention relates to the field of silicate technology and compositions of raw mixtures, which can be used for production of facade plates. A raw mixture for production of facade plates includes, pts. wt.: red-burning clay 67.5-71.0; scrap glass 4.0-6.0; quartz sand 14.0-16.0; granite screenings 4.0-6.0; wollastonite 4.0-6.0; talc 0.5-1.0.
	Dry construction mixture Dry construction mixture contains components with the following ratio, pts. wt.: portland cement 0.75-1, quartz sand with fineness ratio equal to 0.95-1.05, 2.9-3.0, ferruginous hydrated cake, ground to pass through the sieve with holes of 0.2 mm, 0.3 - 0.55.
	Raw mixture for production of expanded clay Raw mixture for production of expanded clay contains, pts. wt.: montmorillonite clay 42.0-43.0, refuse of an overburden rock - bentonite clay 40.0-45.0, fly ash 10.0-15.0, calcium borate 2.0-3.0.
	Raw mixture for production of expanded clay Raw mixture for production of expanded clay contains, pts. wt.: montmorillonite clay 33.0-37.0, refuse of an overburden rock - bentonite clay 40.0-45.0, kaolin 5.0-10.0 phosphogypsum 13.0-17.0.
	Ceramic paste for brick manufacture Ceramic paste for production of bricks contains clay, coal, crushed refuse of brick after drying, granite screenings and kaolin at the following ratio of components, pts. wt.: clay - 80.9-82.9; coal crushed to pass through the mesh No. 014 - 0.3-0.8; refuse of brick crushed to pass through the mesh No. 014 after drying - 0.3-0.8; granite screenings crushed to pass through the mesh No. 014 - 9.0-13.0; kaolin - 5.0-7.0.
	Ceramic paste Ceramic paste contains loess loam, fine coal, kaolin, talc and pegmatite at the following ratio of components, pts. wt.: loess loam - 84.0-94.0, fine coal - 1.0-3.0; kaolin - 3.0-7.0, talc - 1.0-3.0; pegmatite - 1.0-3.0.
	Porcelain mixture Porcelain mixture contains the following components, pts. wt.: kaolin 28.7-30.8; quartz sand 14.0-16.0; potsherd 1.0-5.0; pegmatite 14.0-16.0; sodium tripolyphosphate 0.2-0.3; vellastonit 14.0-16.0; white-burning clay 20.0-24.0.
	Raw material mixture for production of expanded clay aggregate Invention relates to the field of utilisation of wastes of heat-and-power industry, as well as to the field of obtaining construction materials, in particular expanded clay pebbles, and can be used in industrial, civil and road building, including application in heat-insulation layers, fillers, constrictions, in composition of light concretes as a porous filling agent, in composition of insulation layers and floor screed coats in premises, in road constructions. A raw material mixture for production of expanded clay aggregate contains, wt % by solid phase: montmorillonite clay 52-75, kaolinite clay 15-23, limestone 1-2, technical alumina, sludge of chemical purification of HPP water 7-20.
	Raw mixture Raw mixture contains loess, bentonite, scrap glass, kaolin and fly ash at the following ratio of the components, pts. wt.: loess - 81.0-84.0; bentonite - 7.0-11.0; scrap glass - 1.0-1.5; kaolin - 1.0-1.5; fly ash - 5.0-7.0.
	Concrete mixture Concrete mixture comprises, pts. wt. portland cement 26-28, expanded perlite sand, crushed to pass through the mesh No. 014, 29.7-37.7, fine quartz sand 12-16, sodium methylsiliconate or sodium ethyl silicate 0.2-0.3, water 24-26.
	Particularly rapidly hardening pozzolanic cement mixtures Invention relates to a pozzolanic cement composition and to a method of its production. The pozzolanic cement composition includes coarser particles of pozzolan and finer particles of hydraulic cement, containing tricalcium silicate, for instance, Portland cement. The particles coarser than 10 mcm, mainly (50%, 65%, 75%, 85% or 95%), are the pozzolan particles, the particles finer than 10 mcm, mainly (50%, 65%, 75%, 85% or 95%), are the particles of hydraulic cement. From excessive calcium of hydraulic cement formed is calcium hydroxide, which reacts with the pozzolan particles, if necessary, in a combination with additional lime. Pozzolanic cement consists of pozzolan at least by 30%, 40%, 45%, 55%, 65% or 75% (relative to taken together particles of pozzolan and hydraulic cement) and less than by 70%, 60%, 55%, 45%, 35% or 25% consists of hydraulic cement. Method of manufacturing the pozzolanic cement composition includes mixing flows of particles of hydraulic cement and pozzolan with the said particle size. The invention is developed in dependent items of the invention formula.
	Building material Invention proposes a building material obtained by preparing a mixture of caustic magnesite and expanded vermiculite with bulk density of 90 to 250 kg/m3 by adding effective amount of water solution of magnesium chloride with density of 1120÷1290 kg/m3; amount of expanded vermiculite is 38.4÷217 kg on a one cubic metre basis; amount of caustic magnesite is 128÷217 kg on a one cubic metre basis, and volumetric ratio of caustic magnesite and expanded vermiculite is 1:3÷4:5.
	Raw mixture for production of wall ceramic items Raw mixture for production of wall ceramic items includes carbonated clay loam and water suspension including hydrated lime, tallow saponified fatty acids and salt brine at the following component ratio, wt %: carbonated clay loam - 88.55-93.45; hydrated lime - 3.5-6.5; tallow saponified fatty acids - 1.25-2.75; salt brine - 1.8-2.2.
	Raw mixture for production of wall ceramic items Raw mixture contains the following, wt %: ferroalloy production gas cleaning dust 68.0-66.7; carbonated clay loam 29.1-28.6; carbon lining crushing spill 2.9-4.7. Cold resistance comprises 75 cycles.
	Method of producing protective coating on articles with silicon carbide, silicon nitride and carbon-containing base Method of producing a protective coating on articles with a silicon carbide, silicon nitride and carbon-containing base involves forming, on the surface of an article, a slurry coating from a mixture of fine carbon and silicon nitride powder with binder, heating the article in silicon vapour in a closed reactor volume to temperature of 1700-1800°C, holding in said temperature interval for 1-2 hours and then cooling in silicon vapour. Before heating to temperature of 1700-1800°C, the silicon nitride particles are encapsulated in a more heat-resistant material and/or silicon. Encapsulation is carried out, for example, by preheating silicon nitride powder in silicon vapour to 1500°C or in a fluidised bed in a medium of a carbon-containing gas at temperature of partial carbidisation and formation of a pyrocarbon coating on Si3N4 particles, and by treating the slurry coating in a carbon-containing medium at temperature of partial carbidisation of silicon nitride.
	Ceramic mixture for making facing tile Ceramic mixture contains, wt %: copper-nickel ore beneficiation wastes 39.8-58.5, nepheline additive in form of apatite-nepheline ore beneficiation wastes 19.0-39.8, iron ore beneficiation wastes 14.6-19.9 and binder - sulphite alcohol spent liquor 0.5-5.0. The copper-nickel ore beneficiation wastes contain, wt %: chlorite, hydrochlorite 50.6-65.7, serpentine minerals 10.2-15.0, talc 10.0-14.0, magnetite 3.2-7.1, pyroxenes, amphiboles 5.0-6.7, albite 2.0-2.3, quartz 1.9-2.2, gypsum 1.9-2.1. The apatite-nepheline ore beneficiation wastes contain, wt %: nepheline 56.8-61.1, aegirine 10.2-13.0, nepheline secondary minerals 7.5-10.2, feldspar 5.8-7.4, apatite 3.4-5.4, sphene 2.2-3.2, ore minerals 0.9-1.7, mica 1.5-2.3. The iron ore beneficiation wastes contain, wt %: quartz 56.2-68.9, feldspar 17.0-25.5, mica 4.4-8.4, amphibole and pyroxene 1.5-3.4, mineral aggregates 1.3-3.3, magnetite 1.2-3.2.
	Crude mixture for making light aggregate Crude mixture contains the following components, wt %: dust from gas cleaning in ferroalloy manufacturing 63.6-65.6; aqueous sodium hydroxide solution (concentration of 50%) 21.3; liquid glass 10.6; flue ash 2.3-4.3; saponified tall oil fatty acids 0.2.
	Road concrete mix making method Method for making road concrete mix by mixing heated mineral components, bitumen and an additive using oil sludge differs by the fact that as an additive there used is fine-grained powder obtained by intense mixing of the working agent with oil sludge at their ratio of 1.5:1 with addition of water for complete lime slaking, where the working agent is obtained by mixing of the following components, wt %: animal fat 1-3, adsorbent - thermally treated shells 18-22, unslacked lime ground to 10-3÷10-5 m is the rest at bitumen content of 67-84% of the weight of the above additive, mineral components are heated to 70-90°C, mixture of bitumen with the above additive is up to 90-100°C, and mixing of all mixture components is performed at heating of up to 140-170°C.
	Mixture for making brick Mixture for making brick contains clay, wollastonite, halite and quartz sand, with the following ratio of components, wt %: clay - 85.4-86.3; wollastonite - 5.5-6.5; halite - 0.1-0.2; quartz sand - 7.0-9.0.
	Ceramic mixture for making facade tiles Ceramic mixture for making facade tiles contains kaolin, bentonite, phosphorite, quartz sand and talc, with the following ratio of components, wt %: kaolin - 57.0-60.0; bentonite - 6.0-7.5; phosphorite - 4.0-5.5; quartz sand - 14.0-16.0; talc - 14.0-16.0.
	Reinforced natural or conglomerated stone plate-like element and multilayered protective coating thereof Invention relates to construction materials. reinforced natural or conglomerate stone plate-like element includes a substrate of natural or conglomerate stone material; a multilayered coating providing protection of said substrate from chemical and wearing mechanical agents acting on the element; wherein said multilayered coating comprises at least three layers formed from one or multiple film-forming compositions, including an upper layer having scratch resistant nanoparticles embedded in a resin selected from polyester-, melamine-, phenolic, acrylic- and epoxy-resins or any combination thereof, providing scratch protection; a cushioning intermediate layer made of epoxy and/or acrylic resin, providing impact resistance; and a lower layer adjacent to said substrate, including Al2O3 or silicon carbide particles, plus an acrylic polymer, to provide abrasion resistance. The invention is developed in subclaims.

Another patent 2513345.