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1. (WO2019043598) PROCESS FOR THE PREPARATION OF PHOTOCATALYTIC SLABS/SHEETS/BLOCKS AND RELATIVE PHOTOCATALYTIC SLABS/SHEETS/BLOCKS
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Pub. No.: WO/2019/043598 International Application No.: PCT/IB2018/056594
Publication Date: 07.03.2019 International Filing Date: 29.08.2018
IPC:
C04B 28/18 (2006.01) ,C04B 28/28 (2006.01) ,C04B 40/00 (2006.01) ,C04B 40/02 (2006.01) ,C04B 20/10 (2006.01)
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
28
Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
18
containing mixtures of the silica-lime type
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
28
Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
28
containing organic polyacids, e.g. polycarboxylate cements
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
40
Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
40
Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
02
Selection of the hardening environment
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
20
Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/-C04B18/159; Treatment of materials according to more than one of the groups C04B14/-C04B18/116; Expanding or defibrillating materials
10
Coating or impregnating
Applicants:
ITALCEMENTI S.P.A. [IT/IT]; Via Stezzano, 87 I-24126 Bergamo, IT
Inventors:
ALLEVI, Stefano; IT
GUERRINI, Gian Luca; IT
SCALCHI, Enrico; IT
Agent:
DE GREGORI, Antonella; IT
CALOGERO, Ida; IT
DE ROS, Aberto; IT
PONTIROLI, Alessandro; IT
Priority Data:
10201700009763030.08.2017IT
Title (EN) PROCESS FOR THE PREPARATION OF PHOTOCATALYTIC SLABS/SHEETS/BLOCKS AND RELATIVE PHOTOCATALYTIC SLABS/SHEETS/BLOCKS
(FR) PROCÉDÉ DE PRÉPARATION DE DALLES/FEUILLES/BLOCS PHOTOCATALYTIQUES ET DALLES/FEUILLES/BLOCS PHOTOCATALYTIQUES ASSOCIÉS
Abstract:
(EN) A process for the preparation of photocatalytic slabs/sheets/blocks which comprises the following steps: a) mixing a composition in solid powder form with a liquid composition wherein the composition in solid powder form comprises: - at least one binder selected from ground calcium silicate or its precursors and/or relative mixtures, having an average particle size ranging from 1 to 100 mum; - at least one filler; - one photocatalyst based on titanium oxide (Ti02) having an average particle size ranging from 10 to 200 nm and with a specific surface area ranging from about 10 to 300 m2/g; and wherein the liquid composition comprises, at least: - water, - a dispersant; b) discharging the mixture in suspension obtained from step a) into a mould; c) compacting the mixture in suspension in the mould and d) curing the compacted mixture in suspension obtained in step c), at a temperature ranging from 20 to 150°C, for a time ranging from 1 to 80 hours, in an atmosphere of water and CO2 with a pressure ranging from atmospheric pressure to a pressure of 4 bar above atmospheric pressure, and with a concentration of CO2 in water ranging from 10 to 90%. Such a slab/sheet/block made of building material has a compression strength ranging from 50 to 300 MPa and a flexural strength ranging from 5 to 40 MPa, and a water absorption lower than 10%. Such a product can be used as paving element or as building block and has depolluting properties, capable of transforming the atmospheric agents present in the air (for example, nitrogen oxides - NOx) into products no longer harmful to human health (for example, nitrates).
(FR) L'invention concerne un procédé de préparation de dalles/feuilles/blocs photocatalytiques comprenant les étapes suivantes, consistant à : a) mélanger une composition sous forme de poudre solide avec une composition liquide, la composition sous forme de poudre solide comprenant : - au moins un liant choisi parmi le silicate de calcium broyé ou ses précurseurs et/ou les mélanges relatifs, présentant une grosseur de particule moyenne de 1 à 100 µm ; - au moins une charge ; - un photocatalyseur à base d'oxyde de titane (Ti02) présentant une grosseur de particule moyenne de 10 à 200 nm et une surface spécifique d'environ 10 à 300 m2/g ; et la composition liquide comprenant, au moins : - de l'eau, - un dispersant ; b) transvaser le mélange en suspension obtenu à l'étape a) dans un moule ; c) compacter le mélange en suspension dans le moule et d) durcir le mélange compacté en suspension obtenu à l'étape c), à une température de 20 à 150°C, pendant une durée de 1 à 80 heures, dans une atmosphère d'eau et de CO2 à une pression allant de la pression atmosphérique à une pression de 4 bars au-dessus de la pression atmosphérique et présentant une concentration en CO2 dans l'eau allant de 10 à 90 %. Une telle dalle/feuille/bloc en matériau de construction présente une résistance à la compression de 50 à 300 MPa et une résistance à la flexion de 5 à 40 MPa et une absorption d'eau inférieure à 10 %. Un tel produit peut être utilisé comme élément de pavage ou comme bloc de construction et présente des propriétés dépolluantes, en mesure de transformer les agents atmosphériques présents dans l'air (par exemple, des oxydes d'azote - NOx) en produits ne nuisant plus à la santé humaine (par exemple, des nitrates).
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: Italian (IT)