IT202100006917A1 - COMPOSITION FOR THE PREPARATION OF A LIQUID CEMENTITIOUS MORTAR. - Google Patents
COMPOSITION FOR THE PREPARATION OF A LIQUID CEMENTITIOUS MORTAR. Download PDFInfo
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- IT202100006917A1 IT202100006917A1 IT102021000006917A IT202100006917A IT202100006917A1 IT 202100006917 A1 IT202100006917 A1 IT 202100006917A1 IT 102021000006917 A IT102021000006917 A IT 102021000006917A IT 202100006917 A IT202100006917 A IT 202100006917A IT 202100006917 A1 IT202100006917 A1 IT 202100006917A1
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- 239000000203 mixture Substances 0.000 title claims description 57
- 239000004570 mortar (masonry) Substances 0.000 title claims description 21
- 238000002360 preparation method Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 title description 5
- 239000011083 cement mortar Substances 0.000 claims description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 24
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000000292 calcium oxide Substances 0.000 claims description 20
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 20
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 19
- 229910052925 anhydrite Inorganic materials 0.000 claims description 17
- 229940117969 neopentyl glycol Drugs 0.000 claims description 16
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 10
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 claims description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 239000012749 thinning agent Substances 0.000 claims description 2
- 238000001033 granulometry Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000009408 flooring Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000009044 synergistic interaction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/149—Waste materials; Refuse from metallurgical processes other than silica fume or slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/02—Alcohols; Phenols; Ethers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0082—Segregation-preventing agents; Sedimentation-preventing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/56—Opacifiers
- C04B2103/58—Shrinkage reducing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00215—Mortar or concrete mixtures defined by their oxide composition
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Description
?Composizione per la preparazione di una malta cementizia liquida?. ?Composition for the preparation of a liquid cement mortar?.
DESCRIZIONE DESCRIPTION
Il presente trovato ha come oggetto una composizione, particolarmente come additivo per la preparazione di malte cementizie fluide, caratterizzate da assenza di ritiro dopo indurimento. The present invention relates to a composition, particularly as an additive for the preparation of fluid cement mortars, characterized by the absence of shrinkage after hardening.
Le malte attualmente utilizzate per la preparazione di sottofondi in ambito edilizio hanno l'aspetto di un prodotto asciutto, di consistenza assimilabile a terra umida. Il lavoro di messa in opera di una simile malta ? lungo e faticoso e non consente lo sviluppo di una superficie giornaliera superiore ai 200/250mq con tre operai. Inoltre il prodotto presenta molte fessurazioni e tempi di indurimento molto lunghi anche quando messo in opera da personale qualificato. The mortars currently used for the preparation of substrates in the building sector have the appearance of a dry product, with a consistency similar to damp earth. The work of setting up such a mortar? long and tiring and does not allow the development of a daily area of more than 200/250m2 with three workers. Furthermore, the product has many cracks and very long hardening times, even when applied by qualified personnel.
A questi inconvenienti, si ? cercato di porre rimedio producendo malte fluide definite ?autolivellanti?, a base di legante cemento o anidrite, prodotti in stabilimenti di premiscelati a secco, insilate in appositi silos ed infine trasportate in cantiere con costosi mezzi di trasporto. To these drawbacks, yes ? tried to remedy this by producing fluid mortars called ?self-levelling?, based on cement or anhydrite binder, produced in dry premixed plants, ensiled in special silos and finally transported to the construction site with expensive means of transport.
Le malte fluide autolivellanti sono un prodotto valido ma i costi per compensare tale gravoso sforzo sono molto alti ed il mercato, pur accettandole, le ha relegate tra i prodotti di fascia alta e ne ha limitato l'uso solo ai casi di forza maggiore. Inoltre, i massetti a base di anidrite a causa delle loro caratteristiche idrofobiche, non possono essere utilizzati comunemente nell'edilizia civile ma possono essere usati solo in edifici pubblici quali scuole, ospedali e uffici. Self-leveling fluid mortars are a valid product but the costs to compensate for this heavy effort are very high and the market, while accepting them, has relegated them to high-end products and limited their use only to cases of force majeure. Furthermore, due to their hydrophobic characteristics, anhydrite-based screeds cannot be commonly used in civil construction but can only be used in public buildings such as schools, hospitals and offices.
Sarebbe quindi auspicabile poter disporre di malte cementizie di applicazione facile e veloce da prepararsi in cantiere come le malte tradizionali e che siano adatte ad essere utilizzate nelle pi? svariate applicazioni dell'edilizia civile. It would therefore be desirable to have cement mortars that are quick and easy to apply and can be prepared on site like traditional mortars and that are suitable for use in the most? various civil construction applications.
Compito precipuo del presente trovato ? quindi fornire una composizione, particolarmente per la preparazione di malte cementizie fluide, che superi gli inconvenienti dell'arte nota. The main task of the present invention ? thus providing a composition, particularly for the preparation of fluid cement mortars, which overcomes the drawbacks of the prior art.
All'interno di questo compito, scopo del trovato ? fornire una composizione liquida o solida che consenta di preparare malte cementizie fluide di facile e veloce applicazione in cantiere, caratterizzate tra l'altro dall'assenza di fenomeni di sedimentazione e assenza di ritiro e/o fessurazioni dopo indurimento. Within this task, the purpose of the invention ? provide a liquid or solid composition that allows the preparation of fluid cement mortars that are easy and quick to apply on site, characterized among other things by the absence of sedimentation phenomena and the absence of shrinkage and/or cracks after hardening.
Un altro scopo ? fornire una composizione per la preparazione di malte cementizie fluide che permetta di sostituire materie prime pregiate con un materiale meno costoso, riciclato da altri processi. Another purpose? to provide a composition for the preparation of fluid cement mortars which allows the replacement of valuable raw materials with a less expensive material, recycled from other processes.
Un altro scopo ? fornire una composizione come sopra che consenta di preparare malte cementizie fluide adatte ad essere utilizzate nei pi? svariati campi dell'edilizia civile ed in particolare come sottofondo per pavimentazioni. Another purpose? provide a composition as above which allows to prepare fluid cement mortars suitable for use in the most? various fields of civil construction and in particular as a substrate for flooring.
Un ulteriore scopo ? fornire una malta cementizia fluida additivata con una composizione come sopra definita, particolarmente per la preparazione di sottofondi per pavimentazioni. An additional purpose? to provide a fluid cement mortar with the addition of a composition as defined above, particularly for the preparation of substrates for flooring.
Questi e altri scopi sono raggiunti da una composizione, particolarmente per la preparazione di malte cementizie fluide, comprendente: These and other objects are achieved by a composition, particularly for the preparation of fluid cement mortars, comprising:
a) neopentilglicole; a) neopentylglycol;
b) ossido di calcio (CaO); e b) calcium oxide (CaO); And
c) una scoria siderurgica da forno elettrico comprendente: c) a steel slag from an electric furnace comprising:
- dal 27% al 33% in peso di ossido di calcio sinterizzato; - from 27% to 33% by weight of sintered calcium oxide;
- dal 30% al 40% in peso di ossido di ferro (Fe2O3); - from 30% to 40% by weight of iron oxide (Fe2O3);
- dal 10% al 15% in peso di ossido di silicio (SiO2); - from 10% to 15% by weight of silicon oxide (SiO2);
- dal 5% al 10% in peso di ossido di alluminio (Al2O3); - from 5% to 10% by weight of aluminum oxide (Al2O3);
- dal 2% al 5% in peso di ossido di magnesio (MgO); - from 2% to 5% by weight of magnesium oxide (MgO);
- dal 2% al 5% in peso di ossido di manganese (MnO); - from 2% to 5% by weight of manganese oxide (MnO);
ciascuno rispetto al peso totale della scoria siderurgica. each with respect to the total weight of the iron and steel slag.
Gli scopi dell'invenzione sono altres? raggiunti da una malta cementizia fluida, particolarmente per la preparazione di sottofondi in edilizia, comprendente cemento, sabbia, ghiaia e una composizione come sopra definita. The purposes of the invention are also achieved by a fluid cement mortar, particularly for the preparation of substrates in construction, comprising cement, sand, gravel and a composition as defined above.
In un primo aspetto, il trovato riguarda una composizione in forma liquida o in polvere, particolarmente per la preparazione di malte cementizie fluide. In a first aspect, the invention relates to a composition in liquid or powder form, particularly for the preparation of fluid cement mortars.
La composizione del trovato comprende neopentilglicole, ossido di calcio e una scoria siderurgica da forno elettrico. The composition of the invention comprises neopentyl glycol, calcium oxide and an iron and steel slag from an electric furnace.
Ai fini della presente invenzione, la scoria siderurgica da forno elettrico ? un riempitivo che comprende: For the purposes of the present invention, the steel slag from an electric furnace is a filler which includes:
- dal 27% al 33% in peso di ossido di calcio sinterizzato; - from 27% to 33% by weight of sintered calcium oxide;
- dal 30% al 40% in peso di ossido di ferro; - dal 10% al 15% in peso di ossido di silicio; - dal 5% al 10% in peso di ossido di alluminio; - from 30% to 40% by weight of iron oxide; - from 10% to 15% by weight of silicon oxide; - from 5% to 10% by weight of aluminum oxide;
- dal 2% al 5% in peso di ossido di magnesio; - dal 2% al 5% in peso di ossido di manganese; ciascuno rispetto al peso totale della scoria siderurgica. - from 2% to 5% by weight of magnesium oxide; - from 2% to 5% by weight of manganese oxide; each with respect to the total weight of the iron and steel slag.
Opzionalmente, la scoria siderurgica pu? inoltre comprendere altri ossidi metallici in aggiunta a quelli elencati qui sopra. Se presenti, tali altri ossidi metallici sono in proporzione inferiore al 2% in peso rispetto al peso totale della scoria siderurgica. Optionally, the steel slag can further include other metal oxides in addition to those listed above. If present, these other metal oxides are in a proportion of less than 2% by weight with respect to the total weight of the iron and steel slag.
In una forma di realizzazione, la composizione del trovato comprende ulteriormente almeno uno fra: In one embodiment, the composition of the invention further comprises at least one of:
d) anidrite; d) anhydrite;
e) silice ventilata; e e) ventilated silica; And
f) uno o pi? agenti fluidificanti. f) one or more? fluidifying agents.
L'anidrite ? solfato di calcio (CaSO4) in forma cristallina e pu? essere naturale, sintetica o una miscela di anidrite naturale e anidrite sintetica. The anhydrite? calcium sulfate (CaSO4) in crystalline form and pu? be natural, synthetic or a mixture of natural anhydrite and synthetic anhydrite.
In un'altra forma di realizzazione, la composizione del trovato comprende: In another embodiment, the composition of the invention comprises:
d) anidrite; d) anhydrite;
e) silice ventilata; e e) ventilated silica; And
f) uno o pi? agenti fluidificanti. f) one or more? fluidifying agents.
In ancora un'altra forma di realizzazione, la composizione del trovato comprende uno o pi? agenti fluidificanti, dove l'uno o pi? agenti fluidificanti sono naftalensulfonato in combinazione con uno o pi? di una miscela melammina/formaldeide e poliacrilato. In yet another embodiment, the composition of the invention comprises one or more? fluidifying agents, where one or more? thinning agents are naphthalene sulfonate in combination with one or more? of a melamine/formaldehyde and polyacrylate blend.
Gli uno o pi? agenti fluidificanti possono essere in forma liquida o in polvere. The one or more? flow agents can be in liquid or powder form.
In una forma di realizzazione, la composizione del trovato comprende: In one embodiment, the composition of the invention comprises:
a) neopentilglicole in quantit? compresa fra 15% e 22% in peso, preferibilmente fra 17% e 19% in peso, pi? preferibilmente 18% in peso, sul peso totale della composizione; a) neopentylglycol in quantity? between 15% and 22% by weight, preferably between 17% and 19% by weight, more? preferably 18% by weight, based on the total weight of the composition;
b) ossido di calcio in quantit? compresa fra 38% e 55% in peso, preferibilmente fra 43% e 48% in peso, pi? preferibilmente 46%, in peso sul peso totale della composizione; e b) calcium oxide in quantity? between 38% and 55% by weight, preferably between 43% and 48% by weight, more? preferably 46%, by weight on the total weight of the composition; And
c) scoria siderurgica in quantit? compresa fra 15% e 22% in peso, preferibilmente fra 17% e 19% in peso, pi? preferibilmente 18% in peso, sul peso totale della composizione. c) steel slag in quantity? between 15% and 22% by weight, preferably between 17% and 19% by weight, more? preferably 18% by weight, based on the total weight of the composition.
In un'altra forma di realizzazione, oltre a neopentilglicole, ossido di calcio e scoria siderurgica nelle quantit? sopra indicate, la composizione comprende ulteriormente: In another embodiment, in addition to neopentyl glycol, calcium oxide and iron and steel slag in the quantities indicated above, the composition further includes:
d) anidrite sintetica in quantit? compresa fra 1% e 25% in peso; e d) synthetic anhydrite in quantity? between 1% and 25% by weight; And
e) silice ventilata in quantit? compresa fra 1% e 15% in peso; e) ventilated silica in quantity? between 1% and 15% by weight;
ciascuno sul peso totale della composizione. In una forma di realizzazione particolarmente preferita, la composizione del trovato comprende: a) 18% in peso di neopentilglicole; each on the total weight of the composition. In a particularly preferred embodiment, the composition of the invention comprises: a) 18% by weight of neopentyl glycol;
b) 46% in peso di ossido di calcio; b) 46% by weight of calcium oxide;
c) 18% in peso di scoria siderurgica; e d) 18% in peso di anidrite sintetica ciascuno sul peso totale della composizione. In un secondo aspetto, il trovato riguarda una malta cementizia, particolarmente per la preparazioni di sottofondi in edilizia, detta malta comprendente una composizione come sopra definita. c) 18% by weight of steel slag; and d) 18% by weight of synthetic anhydrite each based on the total weight of the composition. In a second aspect, the invention relates to a cement mortar, particularly for preparing substrates in the building industry, said mortar comprising a composition as defined above.
In una forma di realizzazione, la malta cementizia comprende ulteriormente cemento, sabbia e ghiaia. In one embodiment, the cement mortar further comprises cement, sand and gravel.
In una forma di realizzazione preferita, la malta cementizia comprende cemento, sabbia, ghiaia e una composizione come definita di seguito: In a preferred embodiment, the cement mortar comprises cement, sand, gravel and a composition as defined below:
- neopentilglicole in una quantit? pari a 0,35% in peso di malta cementizia; - neopentylglycol in a quantity? equal to 0.35% by weight of cement mortar;
- ossido di calcio in una quantit? pari a 0,9% in peso di malta cementizia; - calcium oxide in a quantity? equal to 0.9% by weight of cement mortar;
- anidrite sintetica in una quantit? pari a 0,35% in peso di malta cementizia; e - synthetic anhydrite in a quantity? equal to 0.35% by weight of cement mortar; And
- scoria siderurgica in quantit? pari a 0,35% in peso di malta cementizia; - iron and steel slag in quantity? equal to 0.35% by weight of cement mortar;
ciascuno sul peso totale della malta. each on the total weight of the mortar.
In una forma di realizzazione preferita, la malta cementizia comprende la composizione secondo il trovato in una quantit? compresa fra 1,5% e 2,5%, preferibilmente 1,9% e 2,1%, ancora pi? preferibilmente 2%, in peso sul peso totale della malta. In a preferred embodiment, the cement mortar comprises the composition according to the invention in a quantity between 1.5% and 2.5%, preferably 1.9% and 2.1%, even more? preferably 2%, by weight on the total weight of the mortar.
Preferibilmente, la sabbia e la ghiaia impiegate nella malta hanno, rispettivamente, una granulometria inferiore a 4mm, e una granulometria compresa fra 4mm e 8mm. Preferably, the sand and gravel used in the mortar have, respectively, a particle size of less than 4mm, and a particle size of between 4mm and 8mm.
Una malta cementizia preparata secondo il trovato ha dimostrato di possedere vantaggi simili alle malte premiscelate autolivellanti, ma con un notevole risparmio in termini di costo di materiale; infatti i costi della malta cementizia secondo il trovato sono del tutto paragonabili a quelli delle miscele sabbia-cemento tradizionali. A cement mortar prepared according to the invention has shown to possess similar advantages to premixed self-levelling mortars, but with a considerable saving in terms of material costs; in fact the costs of the cement mortar according to the invention are wholly comparable to those of the traditional sand-cement mixtures.
In un ulteriore aspetto, il trovato riguarda l'uso di una composizione come sopra definita per preparare una malta cementizia fluida. In a further aspect, the invention relates to the use of a composition as defined above to prepare a fluid cement mortar.
La composizione del trovato, in ogni sua forma di realizzazione consente di preparare malte cementizie caratterizzate da fluidit?, ritiro nullo o inferiore a 300?mm/mm dopo indurimento, fessurazione nulla o limitata dopo indurimento, assenza di sedimentazione delle componenti fluide rispetto a quelle solide. The composition of the invention, in any of its embodiments, allows the preparation of cement mortars characterized by fluidity, zero shrinkage or less than 300mm/mm after hardening, zero or limited cracking after hardening, absence of sedimentation of the fluid components with respect to those solid.
Gli inventori hanno sorprendentemente trovato che la combinazione di almeno neopentilglicole, ossido di calcio e scoria siderurgica comporta l'ottenimento di risultati superiori rispetto all'utilizzo di una composizione comprendente solo neopentilglicole, ossido di calcio o una loro miscela. Ad esempio si ? constatato che il ritiro della malta cementizia dopo indurimento con il solo neopentilglicole si attestava su valori intorno al 30%-50% del ritiro normale, mentre con l'uso della composizione del trovato la riduzione del ritiro ? stata decisamente pi? significativa raggiungendo in taluni casi l'assenza totale di ritiro. The inventors have surprisingly found that the combination of at least neopentyl glycol, calcium oxide and iron and steel slag leads to the achievement of superior results with respect to the use of a composition comprising only neopentyl glycol, calcium oxide or a mixture thereof. For example yes? found that the shrinkage of the cement mortar after hardening with only neopentylglycol stood at values around 30%-50% of the normal shrinkage, while with the use of the composition of the invention the shrinkage reduction ? was definitely more significant reaching in some cases the total absence of withdrawal.
Similmente, si ? anche verificato che l'ossido di calcio immesso nel cemento reagisce dopo l'idratazione dello stesso in misura dipendente dalla sua finezza con i componenti del cemento e pu? convenientemente ridurne il ritiro fino ad annullarlo. Tuttavia, questo effetto si ottiene con dosi elevate che possono rendere l'ossido di calcio non solo compensativo del ritiro, ma addirittura espansivo fino alla demolizione del manufatto. Tale caratteristica diventa ancor pi? indesiderata ad esempio in presenza di umidit?, di dosi di prodotto non reagito o di malta additiva a debole resistenza meccanica. Similarly, yes? it has also been verified that the calcium oxide introduced into the cement reacts after its hydration to an extent dependent on its fineness with the components of the cement and can? conveniently reduce its withdrawal until it is cancelled. However, this effect is obtained with high doses which can make the calcium oxide not only compensate for the shrinkage, but even expansive up to the demolition of the artefact. This feature becomes even more undesirable, for example in the presence of humidity, doses of unreacted product or additive mortar with low mechanical resistance.
Gli inventori del presente trovato hanno in precedenza osservato che miscelando neopentilglicole, e ossido di calcio, preferibilmente con l'aggiunta di silice ventilata e/o anidrite, si ottiene un'interazione sinergica fra i vari componenti che conferisce propriet? uniche alla malta cementizia in cui viene incorporata la composizione. Gli stessi inventori hanno ora scoperto che l'aggiunta della scoria siderurgica nella composizione permette di ottenere un ulteriore sorprendente riduzione del ritiro e un risparmio di materie prime pregiate, quali il neopentilglicole e l'ossido di calcio. L'ossido di calcio contenuto nella scoria siderurgica ? sinterizzato e, come tale, ha caratteristiche espansive diverse rispetto all'ossido di calcio non sinterizzato. In particolare, l'espansione ? di intensit? pi? limitata ma diluita nel tempo. Oltre al vantaggio economico, il riutilizzo un materiale di scarto, quale la scoria siderurgica, comporta un evidente beneficio ecologico. Inoltre la riduzione nelle quantit? di materie prime reattive (espansive) permette di ottenere un prodotto pi? sicuro in termini di contrasto al ritiro. The inventors of the present invention have previously observed that by mixing neopentyl glycol and calcium oxide, preferably with the addition of ventilated silica and/or anhydrite, a synergistic interaction between the various components is obtained which gives properties unique to the cement mortar in which the composition is incorporated. The same inventors have now discovered that the addition of steel slag in the composition allows to obtain a further surprising reduction in shrinkage and a saving of valuable raw materials, such as neopentyl glycol and calcium oxide. The calcium oxide contained in the steel slag? sintered and, as such, has different expansive characteristics than non-sintered calcium oxide. In particular, the expansion ? of intensity? more limited but diluted over time. In addition to the economic advantage, the reuse of a waste material, such as iron and steel slag, has an evident ecological benefit. Furthermore, the reduction in quantities? of reactive raw materials (expansive) allows to obtain a product more? safe in terms of contrast to withdrawal.
L'efficacia della composizione del trovato non risente inoltre di variazioni dell'umidit? dell'ambiente in cui viene utilizzata n? dipende entro certi limiti da un accurato dosaggio della composizione all'interno della malta. La composizione del trovato sottoposta a prove di stress ha sorprendentemente dimostrato che immersa sotto acqua per 38 giorni rigonfia molto limitatamente e non d? inconvenienti di sorta. Inoltre in casi in cui ? stata volutamente dosata erroneamente in eccesso all'interno della malta, la composizione non ha creato problemi di sorta anche a quantit? alle quali i singoli ingredienti, laddove utilizzati separatamente, avevano causato la demolizione della malta indurita. Furthermore, the effectiveness of the composition of the invention is not affected by variations in humidity. of the environment in which it is used n? it depends within certain limits on an accurate dosage of the composition within the mortar. The composition of the invention subjected to stress tests has surprisingly shown that immersed in water for 38 days it swells very slightly and does not give inconvenience of any kind. Also in cases where ? been deliberately dosed erroneously in excess within the mortar, the composition has not created any problems whatsoever even in the quantity? to which the single ingredients, when used separately, had caused the demolition of the hardened mortar.
Altre caratteristiche e vantaggi della presente invenzione risulteranno maggiormente evidenti dai seguenti esempi, intesi esclusivamente a scopo esemplificativo e non limitativo. Other characteristics and advantages of the present invention will become more evident from the following examples, intended exclusively as a non-limiting example.
Esempio 1 (comparativo)- preparazione di una malta cementizia fluida Example 1 (comparative) - preparation of a fluid cement mortar
Una malta cementizia fluida ? stata preparata mescolando 16% in peso di cemento, 77,5% in peso di sabbia e ghiaia, 4,9% di acqua, 0,3% in peso di neopentilglicole, 0,75% in peso di ossido di calcio, 0,3% in peso di anidrite, 0,25% in peso di un riempitivo inerte sul peso totale della malta. Esempio 2 - preparazione di una malta cementizia fluida secondo il trovato A fluid cement mortar? was prepared by mixing 16% by weight of cement, 77.5% by weight of sand and gravel, 4.9% of water, 0.3% by weight of neopentyl glycol, 0.75% by weight of calcium oxide, 0, 3% by weight of anhydrite, 0.25% by weight of an inert filler on the total weight of the mortar. Example 2 - preparation of a fluid cement mortar according to the invention
Una malta cementizia fluida secondo il trovato ? stata preparata mescolando 16% in peso di cemento, 77,5% in peso di sabbia e ghiaia, 4,9% di acqua, 0,3% in peso di neopentilglicole, 0,75% in peso di ossido di calcio, 0,3% in peso di anidrite e 0,25% in peso di scoria siderurgica da forno elettrico, sul peso totale della malta. A fluid cement mortar according to the invention ? was prepared by mixing 16% by weight of cement, 77.5% by weight of sand and gravel, 4.9% of water, 0.3% by weight of neopentyl glycol, 0.75% by weight of calcium oxide, 0, 3% by weight of anhydrite and 0.25% by weight of iron and steel slag from an electric furnace, on the total weight of the mortar.
Esempio 3 ? caratterizzazione delle malte cementizie fluide degli esempi 1 e 2 Example 3 ? characterization of the fluid cement mortars of Examples 1 and 2
Le malte ottenute negli esempi 1 e 2 sono state caratterizzate mediante determinazione di resistenza meccanica (secondo la norma (UNI EN 196-1:2016), spandimento al cono (secondo la norma UNI 7044:1972), e ritiro (secondo la norma UNI 6687:1973). I risultati sono riportati di seguito: The mortars obtained in examples 1 and 2 were characterized by determination of mechanical strength (according to the standard (UNI EN 196-1:2016), spreading at the cone (according to the UNI 7044:1972 standard), and shrinkage (according to the UNI 6687:1973).The results are shown below:
I risultati mostrano una significativa riduzione del ritiro per la malta del trovato prodotta nell'esempio 2. The results show a significant shrinkage reduction for the mortar of the invention produced in Example 2.
Si ? in pratica constatato come la composizione secondo il trovato assolva pienamente il compito prefissato in quanto permette di ottenere malte cementizie fluide di facile e veloce applicazione in cantiere caratterizzate dall'assenza di fenomeni di sedimentazione e fessurazioni dopo indurimento e da una riduzione del ritiro, adatte ad essere utilizzate nei pi? svariati campi dell'edilizia civile ed in particolare come sottofondo per pavimentazioni. Yes ? in practice it has been observed that the composition according to the invention fully achieves the intended aim and aim, since it allows to obtain fluid cement mortars that are easy and quick to apply on site characterized by the absence of sedimentation phenomena and cracks after hardening and by a reduction in shrinkage, suitable for be used in the pi? various fields of civil construction and in particular as a substrate for flooring.
Vantaggiosamente la composizione del trovato permette di sostituire materie prime pregiate con un materiale meno costoso, riciclato da altri processi, quale la scoria siderurgica da forno elettrico. Advantageously, the composition of the invention allows valuable raw materials to be replaced with a less expensive material, recycled from other processes, such as iron and steel slag from an electric furnace.
Oltre al vantaggio economico vi ? quindi un vantaggio ecologico. In addition to the economic advantage there? therefore an ecological advantage.
La composizione e la malta, cos? concepite, sono suscettibili di numerose modifiche e varianti, tutte rientranti nell'ambito del concetto inventivo; inoltre, tutti i dettagli potranno essere sostituiti da altri elementi tecnicamente equivalenti. The composition and the mortar, cos? conceived, they are susceptible to numerous modifications and variations, all falling within the scope of the inventive concept; furthermore, all the details may be replaced by other technically equivalent elements.
In pratica, i materiali impiegati, nonch? le dimensioni, potranno essere qualsiasi secondo le esigenze e lo stato della tecnica. In practice, the materials used, as well as? the dimensions may be any according to the requirements and the state of the art.
Claims (10)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1627864B1 (en) * | 2004-08-20 | 2007-07-25 | Inter.Chape S.R.L. | Composition particularly for preparing cement mortars |
| US20180170805A1 (en) * | 2016-12-21 | 2018-06-21 | Gerdau S.A. | Steel product, cement manufacturing process and cement |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1627864B1 (en) * | 2004-08-20 | 2007-07-25 | Inter.Chape S.R.L. | Composition particularly for preparing cement mortars |
| US20180170805A1 (en) * | 2016-12-21 | 2018-06-21 | Gerdau S.A. | Steel product, cement manufacturing process and cement |
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| Title |
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| COPPOLA LUIGI ET AL: "Electric arc furnace granulated slag for sustainable concrete", CONSTRUCTION AND BUILDING MATERIALS, ELSEVIER, NETHERLANDS, vol. 123, 5 July 2016 (2016-07-05), pages 115 - 119, XP029710968, ISSN: 0950-0618, DOI: 10.1016/J.CONBUILDMAT.2016.06.142 * |
| YÜKSEL ISA ED - LEAL FILHO WALTER ET AL: "A review of steel slag usage in construction industry for sustainable development", ENVIRONMENT, DEVELOPMENT AND SUSTAINABILITY, SPRINGER NETHERLANDS, DORDRECHT, vol. 19, no. 2, 20 January 2016 (2016-01-20), pages 369 - 384, XP036173777, ISSN: 1387-585X, [retrieved on 20160120], DOI: 10.1007/S10668-016-9759-X * |
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