WO2022214759A1 - Liant hydraulique pour composition de mortier - Google Patents
Liant hydraulique pour composition de mortier Download PDFInfo
- Publication number
- WO2022214759A1 WO2022214759A1 PCT/FR2022/050627 FR2022050627W WO2022214759A1 WO 2022214759 A1 WO2022214759 A1 WO 2022214759A1 FR 2022050627 W FR2022050627 W FR 2022050627W WO 2022214759 A1 WO2022214759 A1 WO 2022214759A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ladle slag
- weight
- binder
- cements
- mortar composition
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 68
- 239000011230 binding agent Substances 0.000 title claims abstract description 45
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 44
- 239000002893 slag Substances 0.000 claims abstract description 68
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 45
- 239000004568 cement Substances 0.000 claims description 41
- 239000011398 Portland cement Substances 0.000 claims description 22
- 235000011132 calcium sulphate Nutrition 0.000 claims description 20
- 239000001175 calcium sulphate Substances 0.000 claims description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 14
- 239000000470 constituent Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 229910052925 anhydrite Inorganic materials 0.000 claims description 5
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- -1 hemihydrate Substances 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 239000011505 plaster Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 230000003115 biocidal effect Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 239000002952 polymeric resin Substances 0.000 claims description 2
- 239000011814 protection agent Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000002562 thickening agent Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910002056 binary alloy Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000001033 granulometry Methods 0.000 description 3
- 238000009847 ladle furnace Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000003991 Rietveld refinement Methods 0.000 description 1
- 230000018199 S phase Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011411 calcium sulfoaluminate cement Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000013589 supplement 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
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/16—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 calcium sulfate cements containing anhydrite, e.g. Keene's cement
-
- 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
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- 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
- C04B28/14—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 calcium sulfate cements
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
-
- 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
- C04B2111/60—Flooring 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
Definitions
- the present invention relates to a hydraulic binder for a mortar composition based on an industrial by-product, to a mortar composition comprising said binder, as well as to products for the floor or technical mortars or mortars with quickly obtained from such a composition.
- Many mortar compositions used in the field of construction implement cements of the aluminous type (or also known by the abbreviation CAC for "calcium aluminate cements") or sulfoaluminous (or also known by the abbreviation CSA for “calcium sulfoaluminate cements”). These types of CAC cements have been developed for many years and their use is widespread today.
- cements make it possible in particular to shorten the setting times and therefore to accelerate the hardening of the composition but also to control the dimensional variations during the hardening or also to reinforce the mechanical strength.
- aluminous or sulfoaluminous cements are used mixed with Portland cements to achieve rapid settings.
- the accelerating power of the binary system depends on the CAC/OPC ratio. It is also known that aluminous or sulfoaluminate cements are used in a mixture with sources of calcium sulphate and possibly Portland cement to control dimensional variations or even to obtain rapid endogenous hardening.
- Aluminous and Portland cements are the source of emissions of approximately 800 kg of CO2 per tonne of cement produced. They are also consumers of energy and natural resources.
- the present invention relates to a hydraulic binder for a mortar composition, which comprises at least one ladle slag having a particle size distribution by volume such that the D50 is less than 40 ⁇ m.
- a slag is a by-product of an industrial process implementing the fusion of a starting material, fusion intended to separate metals from an oxide phase, the latter being called “slag”.
- Pocket slags are steel slags, resulting from the secondary metallurgy of steel. More specifically, conversion steel (from a cast iron conversion steelworks, in particular in an oxygen converter) or so-called electric steel (from an electric steelworks, in particular by melting scrap in a arc furnace) is cast in a ladle and transferred to an installation called a "ladle furnace". Generally equipped with three graphite electrodes, the ladle furnace allows the desired shade to be set by addition and deoxidation complements and ensures the maintenance of the temperature. The homogenization of the liquid steel is ensured by gas mixing with argon or nitrogen. The ladle slag is the slag from the ladle furnace.
- Pocket slags are distinguished by their chemical and mineralogical composition from other steelmaking slags, namely blast-furnace slags and other steelworks slags such as conversion steelworks slags (often called "LD slags"). ) and electric steelmaking slags.
- blast furnace slags used in hydraulic binders are generally amorphous (vitreous) because they have been
- Ladle slags are also more basic than electric steelworks slags. It will however be noted that the ladle slags have different chemical and mineralogical compositions depending on their origin, depending in particular on the addition and deoxidation supplements used.
- the ladle slag is ground to obtain very fine particles. This grinding operation must be taken into consideration to calculate the carbon footprint during the manufacture of the binder. However, if we compare it to the carbon footprint of an aluminous or sulfoaluminate cement manufacturing process, the grinding operation makes it possible to greatly reduce CO2 emissions.
- the ladle slag used in the invention has a particle size distribution by volume such as D50 is less than 40 ⁇ m, preferably less than 20 ⁇ m, and in particular between 8 and 15 ⁇ m.
- the D50 is the size such that 50% by volume of the particles have a size less than this D50 value.
- the particle size distribution by volume is preferably determined by laser granulometry (also called granulometry by laser diffraction). This fineness of the particles makes it possible in particular to give the slag good reactivity allowing it to be used in a mortar composition and to obtain the expected properties in terms of setting time and mechanical strength.
- the D90 is preferably less than 100 ⁇ m, in particular less than 60 ⁇ m.
- the inventors were able to demonstrate that, surprisingly, such a slag could substitute, partially or totally, for alumina cements, by conferring the same properties of accelerating the hardening of the composition, controlling dimensional variations during hardening and improvement in mechanical strength. These properties make the addition of such a binder particularly advantageous in mortar compositions for floor products, in particular screeds and plasters, and in quick-setting mortar.
- the ladle slag Due to the complementary addition of lime or dolomite in the ladle, the ladle slag is very rich in lime. It is also rich in alumina.
- the elementary chemical compositions are given in mass % equivalents of oxide.
- a substance contains X% of alumina means that this substance contains the element Aluminum in an amount equivalent to that provided by X% of alumina; it does not necessarily mean that the substance contains alumina as a chemical compound or mineralogical constituent.
- the close slag preferably has a chemical composition comprising the following constituents, within the limits below expressed in percentages by weight: - SiC> 2 : 2-20%, in particular 5-15%, particularly 7-12%,
- Al 2 O 3 15-50%, in particular 20-48%, even 25-45%, particularly 30-40%.
- the ladle slag may also comprise magnesia (MgO), in particular in a content of between 2 and 10%, or even between 3 and 8%.
- MgO magnesia
- the iron oxide content in the ladle slag is preferably less than 5% by weight, in particular less than 3% by weight, and even less than 2% by weight.
- the ladle slag is preferably crystallized to at least 30%, in particular to at least 50% or 60%, or even to at least 70% or 75% by weight.
- the crystallization rate can be evaluated by X-ray diffraction using the Rietveld method. The rate of crystallization will depend in particular on the cooling rate of the slag, a slower cooled slag developing more crystalline phases.
- the ladle slag comprises at least one crystalline phase of the calcium aluminate type (in particular of the C 3 A or/and C 12 A 7 type, this latter phase being called mayenite, or/ and C 4 AF), in particular in a content by weight of at least 10%, or even of at least 15% and even of at least 20%, in particular between 10 and 60%, or even between 30 and 55%.
- the calcium aluminate type in particular of the C 3 A or/and C 12 A 7 type, this latter phase being called mayenite, or/ and C 4 AF
- the ladle slag comprises both a C 3 A phase and a C 12 A 7 phase, in a content by weight total of at least 20%, in particular of at least 30%, in particular comprised between 35 and 60%.
- the reactivity of the ladle slag is also improved if it also comprises crystalline phases of the calcium silicate type (in particular of the C 2 S and/or C 3 S type).
- the total content of crystalline phases of the calcium aluminate type is however greater than the total content of crystalline phases of the calcium silicate type.
- the binder preferably comprises the ladle slag and at least one of the following constituents:
- cements chosen from Portland cements, belitic cements, aluminous or sulfoaluminate cements, cements of pozzolanic mixtures optionally comprising fly ash, silica fume, limestone, calcined shale and/or natural pozzolans or calcined, and/or
- the binder according to the present invention can be a binary binder, in the sense that it is the mixture of two constituents, or a ternary binder if it is a mixture of three constituents.
- the binder can also be more complex in its composition and comprise more than three different constituents, in particular four.
- the binder consists of ladle slag and Portland cement.
- the ladle slag content is less than 40% by weight, the remainder being Portland cement. Even more preferably, the ladle slag content is less than 20% by weight. This limited quantity of ladle slag allows to maintain mechanical resistances compatible with the desired applications.
- the ladle slag content may be higher.
- Such a system can comprise up to 90% by weight of ladle slag, in particular from 50 to 80%, or even from 60 to 75% by weight, of ladle slag, the remainder being calcium sulphate.
- the binder can also advantageously be a ternary binder and consist of ladle slag, Portland cement and calcium sulphate. The relative proportions of each of the constituents may vary depending on the application sought for the mortar.
- the binder can comprise between 10 and 50% by weight of cement
- the binder according to the present invention may optionally comprise aluminous or sulfoaluminate cement.
- the binder is then a quaternary binder consisting of ladle slag, Portland cement, aluminous cement and calcium sulphate.
- the ladle slag partially replaces the alumina cement.
- the binder according to the invention comprises (or even consists), by weight:
- a binder is in particular suitable for floor products.
- the binder comprises or consists, by weight, of 5 to 80% ladle slag, 0 to 50% Portland cement, 1 to 50% calcium sulphate and 0 to 60% alumina cement. Even more advantageously, the binder comprises or consists, by weight, of 10 to 70% ladle slag, 2 to 35% Portland cement, 5 to 45% calcium sulphate and 2 to 35% alumina cement.
- the present invention also relates to a dry mortar composition
- a dry mortar composition comprising a binder according to the invention and aggregates.
- composition is referred to as dry since most, if not all, of these constituents are in powder form.
- percentages of each of the constituents are given as percentages by mass relative to all of the components of said composition.
- the aggregates generally used in mortar compositions have a diameter of less than 8 mm, preferably less than 4 mm, or even less than 3 mm, which distinguishes mortar compositions from concrete compositions, which contain coarse aggregates.
- Aggregates are mineral grains, in particular grains of stone, gravel, grit, pebbles and/or sand.
- the aggregates may include fillers, which are finely ground inert mineral materials, generally of the limestone or siliceous type.
- the aggregates comprise sands and/or fillers, but not gravel or gravel.
- the total content of aggregates is preferably between 40 and 90% by weight relative to the dry mortar composition.
- the mortar composition according to the present invention comprises a binary hydraulic binder which is a mixture of ladle slag and Portland cement.
- It can also comprise a ternary hydraulic binder which is the mixture of ladle slag and two other binders chosen from:
- cements chosen from Portland cements, belitic cements, aluminous or sulfoaluminate cements, cements of pozzolanic mixtures optionally comprising fly ash, silica fume, limestone, calcined shale and/or natural or calcined pozzolans, and or
- the mortar composition according to the present invention comprises a ternary hydraulic binder which is the mixture of ladle slag, Portland cement and a source of calcium sulphate, chosen in particular from plaster, hemihydrate, gypsum and/or anhydrite, alone or as a mixture.
- a ternary hydraulic binder which is the mixture of ladle slag, Portland cement and a source of calcium sulphate, chosen in particular from plaster, hemihydrate, gypsum and/or anhydrite, alone or as a mixture.
- the mortar composition may further comprise aluminous or sulfoaluminate cement.
- the mortar composition can thus comprise a quaternary hydraulic binder which is the mixture of ladle slag, Portland cement, alumina cement and a source of calcium sulphate.
- the binder according to the invention preferably represents between 10 and 60% by weight of the dry mortar composition (therefore of the total dry mixture of the various powdery constituents), depending on the use chosen for the composition.
- the mortar composition comprises (by weight) from 0 to 7%, in particular from 3 to 6%, of Portland cement, from 1 to 35%, in particular from 8 to 15%, of ladle slag, of 1 to 15%, in particular from 5 to 10% of calcium sulphate, from 0 to 5%, in particular from 1 to 4% of alumina cement, and from 40 to 90% of aggregates.
- Such mortar compositions are particularly advantageous for flooring products.
- the mortar composition according to the present invention may comprise an activator chosen from the activators known for their use in compositions for mortars based on ternary binders or cements.
- the composition may also comprise one or more additives, chosen from rheological agents, water-retaining agents, air-entraining agents, thickening agents, biocidal protection agents, dispersing agents, pigments, accelerators and / or retarders, polymeric resins, anti foam agents.
- additives chosen from rheological agents, water-retaining agents, air-entraining agents, thickening agents, biocidal protection agents, dispersing agents, pigments, accelerators and / or retarders, polymeric resins, anti foam agents.
- the total content of additives and adjuvants preferably varies between 0.001 and 5% by weight relative to the total weight of the dry composition.
- the present invention also relates to products for floors such as coatings or screeds and also to technical mortars (in particular repair mortars) capable of being obtained by mixing the dry mortar composition with water.
- the binder according to the invention is also particularly advantageous in the case of fast-setting mortars, in particular jointing mortars or adhesive mortars.
- These floor products will traditionally be obtained by hardening in air and at ambient temperature of the mortar obtained after mixing.
- screeds or floor coatings are obtained by mixing the dry mortar composition with water, then by pouring the liquid obtained onto a substrate so as to obtain a layer which is then allowed to harden in the air. and at room temperature.
- wet composition spread values should generally be greater than 200 mm when measured at 2 minutes. The spread value is determined using a ring having a height of 35 mm and a diameter of 68 mm.
- the product obtained after drying and hardening of the wet mortar composition which may be a floor coating or a screed, must meet certain mechanical characteristics.
- the flexural strength of these products must in particular be greater than 4 MPa after 28 days, and the compressive strength must be greater than 18 MPa after 28 days for a P3 class.
- shrinkage upon drying of the wet composition is controlled. This shrinkage is generally less than 1 mm/m.
- Table 1 indicates the composition of mortars for floor products tested (in mass %) as well as the properties obtained.
- OPC designates Portland cement type CEM I
- CAC 1 and CAC 2 are two types of aluminous cement (respectively designated commercially as HiPerCem and Ciment Fondu), and calcium sulphate is a mixture of anhydrite and hemihydrate .
- the ladle slag had the following composition by weight: 8.8% Si0 2 , 31.5% A1 2 0 3 , 49.4% CaO, 6.4% MgO, 1.1% Ti0 2 , 1.1% Fe 2 0 3 and 1.7% impurities.
- the slag was overwhelmingly crystallized, and contained 30% C I2A7 phase (mayenite), 16% C 3A phase and 16% C 2 S phases. Its D50, determined by laser granulometry, was 9.8 ⁇ m and the D90 of about 42 ⁇ m.
- Comparative Example C1 uses alumina cement, but no ladle slag.
- the table shows the spread at 2 minutes, measured according to the method previously measured, the start and end of setting, determined by the Vicat test, the flexural and compressive strengths at 1, 7 and 28 days, measured according to the EN standard 13892-2 and shrinkage at 28 days, measured according to standard EN13872.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112023019297A BR112023019297A2 (pt) | 2021-04-09 | 2022-04-04 | Ligante hidráulico para composição de argamassa |
EP22718756.4A EP4320085A1 (fr) | 2021-04-09 | 2022-04-04 | Liant hydraulique pour composition de mortier |
US18/553,815 US20240190772A1 (en) | 2021-04-09 | 2022-04-04 | Hydraulic binder for mortar composition |
CA3212444A CA3212444A1 (fr) | 2021-04-09 | 2022-04-04 | Liant hydraulique pour composition de mortier |
CN202280027166.5A CN117120393A (zh) | 2021-04-09 | 2022-04-04 | 用于砂浆组合物的水硬性粘结剂 |
MX2023011866A MX2023011866A (es) | 2021-04-09 | 2022-04-04 | Aglutinante hidraulico para composicion de mortero. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2103680A FR3121676B1 (fr) | 2021-04-09 | 2021-04-09 | Liant hydraulique pour composition de mortier |
FRFR2103680 | 2021-04-09 |
Publications (1)
Publication Number | Publication Date |
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WO2022214759A1 true WO2022214759A1 (fr) | 2022-10-13 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2022/050627 WO2022214759A1 (fr) | 2021-04-09 | 2022-04-04 | Liant hydraulique pour composition de mortier |
Country Status (9)
Country | Link |
---|---|
US (1) | US20240190772A1 (fr) |
EP (1) | EP4320085A1 (fr) |
CN (1) | CN117120393A (fr) |
BR (1) | BR112023019297A2 (fr) |
CA (1) | CA3212444A1 (fr) |
CL (1) | CL2023003007A1 (fr) |
FR (1) | FR3121676B1 (fr) |
MX (1) | MX2023011866A (fr) |
WO (1) | WO2022214759A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2080742A2 (fr) * | 2008-01-15 | 2009-07-22 | HeidelbergCement AG | Ciment de fonderie au sulfate |
WO2018102931A1 (fr) * | 2016-12-09 | 2018-06-14 | The Royal Institution For The Advancement Of Learning/Mcgill University | Produits d'aménagement paysager et procédé de production de ces derniers |
WO2020206540A1 (fr) * | 2019-04-12 | 2020-10-15 | Carbicrete Inc. | Production de produits de béton à base de laitier coulé par voie humide |
-
2021
- 2021-04-09 FR FR2103680A patent/FR3121676B1/fr active Active
-
2022
- 2022-04-04 CN CN202280027166.5A patent/CN117120393A/zh active Pending
- 2022-04-04 WO PCT/FR2022/050627 patent/WO2022214759A1/fr active Application Filing
- 2022-04-04 EP EP22718756.4A patent/EP4320085A1/fr active Pending
- 2022-04-04 MX MX2023011866A patent/MX2023011866A/es unknown
- 2022-04-04 BR BR112023019297A patent/BR112023019297A2/pt unknown
- 2022-04-04 US US18/553,815 patent/US20240190772A1/en active Pending
- 2022-04-04 CA CA3212444A patent/CA3212444A1/fr active Pending
-
2023
- 2023-10-06 CL CL2023003007A patent/CL2023003007A1/es unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2080742A2 (fr) * | 2008-01-15 | 2009-07-22 | HeidelbergCement AG | Ciment de fonderie au sulfate |
WO2018102931A1 (fr) * | 2016-12-09 | 2018-06-14 | The Royal Institution For The Advancement Of Learning/Mcgill University | Produits d'aménagement paysager et procédé de production de ces derniers |
WO2020206540A1 (fr) * | 2019-04-12 | 2020-10-15 | Carbicrete Inc. | Production de produits de béton à base de laitier coulé par voie humide |
Non-Patent Citations (1)
Title |
---|
NGUYEN HOANG, KINNUNEN PAIVO; GIJBELS KATRIJN; CARVELLI VALTER; SREENIVASAN HARISANKAR; KANTOLA ANU M.; TELKKI VILLE-VEIKKO; SCHRO: "Ettringite-based binder from ladle slag and gypsum – The effect of citric acid on fresh and hardened state properties", CEMENT AND CONCRETE RESEARCH, vol. 123, 1 September 2019 (2019-09-01), US , pages 1 - 12, XP093173812, ISSN: 0008-8846, DOI: 10.1016/j.cemconres.2019.105800 |
Also Published As
Publication number | Publication date |
---|---|
CN117120393A (zh) | 2023-11-24 |
CL2023003007A1 (es) | 2024-04-01 |
FR3121676B1 (fr) | 2023-06-30 |
CA3212444A1 (fr) | 2022-10-13 |
US20240190772A1 (en) | 2024-06-13 |
MX2023011866A (es) | 2023-11-10 |
FR3121676A1 (fr) | 2022-10-14 |
EP4320085A1 (fr) | 2024-02-14 |
BR112023019297A2 (pt) | 2023-10-31 |
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