EP4490120A1 - Composition de liant hydraulique de laitiers de hauts fourneaux - Google Patents
Composition de liant hydraulique de laitiers de hauts fourneauxInfo
- Publication number
- EP4490120A1 EP4490120A1 EP23709723.3A EP23709723A EP4490120A1 EP 4490120 A1 EP4490120 A1 EP 4490120A1 EP 23709723 A EP23709723 A EP 23709723A EP 4490120 A1 EP4490120 A1 EP 4490120A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic binder
- hydraulic
- salts
- nitric acid
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/085—Acids or salts thereof containing nitrogen in the anion, e.g. nitrites
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- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/10—Acids or salts thereof containing carbon in the anion, e.g. carbonates
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—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
- 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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- 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
- C04B28/04—Portland cements
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- 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
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
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- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
Definitions
- the present invention relates to a hydraulic binder composition
- a hydraulic binder composition comprising at least one alumino-siliceous compound and an alkaline or sulfate activator, and a reduced quantity of clinker and maintaining the workability of the hydraulic composition obtained, in particular by adding water to the hydraulic binder composition.
- Usual cementitious compositions include a variable, sometimes significant, proportion of clinker.
- a cementitious composition according to standard NF EN 197-1 of 2012 comprises 5 to 95% by weight of clinker.
- compositions comprising at least one alumino-siliceous compound, preferably blast furnace slag.
- An objective of the present invention is to provide a hydraulic binder composition comprising at least one alumino-siliceous compound and an alkaline or sulfate activator making it possible to obtain a hydraulic composition having improved fluidity maintenance.
- Another objective of the present invention is to provide a hydraulic binder composition comprising at least one alumino-siliceous compound and an alkaline or sulfate activator having good thixotropic properties and a good compromise between thixotropic properties and mechanical resistance, particularly at 28 days.
- Another objective of the present invention is to provide such a composition allowing fluidity to be maintained for 1 hour or 1 hour 30 minutes.
- a hydraulic binder composition comprising: a hydraulic binder comprising at least one alumino-siliceous compound and an alkaline or sulfate activator and a maximum of 10% by weight of clinker, preferably 0 to 10% by weight of clinker; nitric acid or one of its salts, the nitric acid salt not being a zinc nitrate.
- the inventors have advantageously shown that the addition of nitric acid or one of its salts, with the exception of zinc nitrate, according to the invention makes it possible to improve the maintenance of fluidity (also called maintenance of fluidity). workability) over time of a hydraulic composition prepared from the hydraulic binder composition (CLH), in particular by adding at least water, compared to a composition not comprising nitric acid or one of its salts according to the invention.
- a hydraulic composition prepared from the hydraulic binder composition in particular by adding at least water, compared to a composition not comprising nitric acid or one of its salts according to the invention.
- the improvement in maintaining workability measured for example by the evolution of the threshold stress of a hydraulic composition obtained from the CLH composition, in particular by adding water, during of time, is preferably long term, namely over a period greater than or equal to 45 minutes, in particular greater than 60 minutes, or even greater than 90 minutes when the composition is used at 20°C.
- threshold stresses of the order of 1 to 10 Pa during the same time intervals that is to say over a period greater than or equal to 45 minutes, in particular greater than 60 minutes, or even greater than 90 minutes when the composition is used at 20°C.
- the threshold stress can in particular be measured using a rheometer by carrying out several measurements of the applied stress to obtain each corresponding strain rate value.
- the applied stress below which the strain rate becomes very low or zero can be considered as the threshold stress.
- nitric acid or one of its salts made it possible to provide thixotropic properties to the hydraulic composition advantageously without significantly modifying the resistances.
- the hydraulic binder composition (CLH) may be free of clinker.
- the clinker can be a Portland cement, sulfo-aluminous or sulfo-belitic cement clinker.
- alumino-siliceous compound means blast furnace slag, pozzolanic materials (as defined in the Cement standard NF EN 197-1 (2012) paragraph 5.2.3), fly ash (such as defined in the Cement standard NF EN 197-1 (2012) paragraph 5.2.4), calcined shale (as defined in the Cement standard NF EN 197-1 (2012) paragraph 5.2.5), or silica fumes (as defined in the Cement standard NF EN 197-1(2012) paragraph 5.2.7) or their mixtures.
- Other minerals not currently recognized by the Cement standard NF EN 197-1 (2012), can also be used.
- metakaolins such as type A metakaolins conforming to standard NF P 18-513 (August 2012) or calcined clays
- siliceous additions such as siliceous additions of mineralogy Qz conforming to standard NF P 18-509 (September 2012)
- aluminosilicates particularly of the inorganic geopolymer type, aluminosilicates containing iron oxides such as bauxite residues, norites or aplites from excavations.
- the alumino-siliceous compound is chosen from blast furnace slag, pozzolanic materials (as defined in the Cement standard NF EN 197-1 (2012) paragraph 5.2.3), fly ash (as defined in the Cement standard NF EN 197-1 (2012) paragraph 5.2.4), calcined shales (as defined in the Cement standard NF EN 197-1 (2012) paragraph 5.2.5), metakaolins, such as metakaolins type A conforming to standard NF P 18-513 (March 2012) or calcined clays, alumino-silicates in particular of the inorganic geopolymer type, alumino-silicates containing iron oxides such as bauxite residues, norites or aplites from excavations.
- the composition of the invention may comprise a mixture of aluminosiliceous compounds.
- the hydraulic binder composition comprises from 75 to 99% by weight of alumino-siliceous compound, preferably from 80 to 95% by weight, for example from 80 to 90% by weight, relative to the total weight of hydraulic binder. .
- the hydraulic binder consists of an aluminosilica compound and an alkaline or sulfate activator.
- the hydraulic binder may also include mineral additions, preferably from 0 to 10% by weight relative to the weight of hydraulic binder.
- the proportions of additions and their nature can also comply with standard prEN 197-5, which defines CEM ll/C-M cements comprising between 50 and 64% clinker and 36 to 50% blast furnace slag and cements CEM VI comprising 35 to 49% clinker, 31 to 59% blast furnace slag and 6 to 20% mineral additions as defined above.
- the alumino-siliceous compound is a blast furnace slag and the hydraulic binder may also include mineral additions.
- Blast furnace slag is defined in particular in part 3.7 and 3.6 of standard NF EN 15167-1. Blast furnace slags are predominantly vitreous materials and are by-products of cast iron manufacturing.
- the blast furnace slag used in the hydraulic binder compositions is preferably finely ground to a maximum diameter of 100 to 150 pm, the diameter being measured by any method known to those skilled in the art, for example by laser particle size analysis.
- Blast furnace slags generally require calcium or sulfo-calcium activation or using a strong base.
- metakaolins such as type A metakaolins conforming to standard NF P 18-513 (August 2012) or calcined clays
- siliceous additions such as siliceous additions of mineralogy Qz conforming to standard NF P 18-509 (September 2012)
- aluminosilicates particularly of the inorganic geopolymer type.
- the proportions of additions and their nature can also comply with standard prEN 197-5, which defines CEM ll/CM cements comprising between 50 and 64% clinker and 36 to 50% blast furnace slag and cements CEM VI comprising 35 to 49% clinker, 31 to 59% blast furnace slag and 6 to 20% mineral additions as defined above.
- the hydraulic binder composition (CLH) of the invention comprises at least one alkaline or sulfate activator of alumino-siliceous compounds, in particular blast furnace slag.
- These activators are known and in particular described in Alkaline activation of different aluminosilicates as an alternative to Portland cement: alkali activated cements or geopolymers. Revista Ingeniena de ConstrucciônRICVol 32 N e 22017.
- the activator is a calcium or sulfate activator, preferably sulfo-calcium, or an alkaline salt, preferably carbonate, hydroxide, silicate, of sodium or potassium, or their mixtures or a calcium sulfate activator.
- This activator is preferably used in proportions of 0.1 to 20% by dry weight relative to the weight of hydraulic binder, preferably from 1% to 20% by dry weight relative to the weight of hydraulic binder.
- the hydraulic binder composition may also comprise calcium sulfate, in particular in a proportion of 5 to 20% by weight.
- Such hydraulic binder compositions are also called super-sulphated cement (CSS) and are in particular as defined in standard NF EN 15743+A1.
- the hydraulic binder comprises, preferably consists of a blast furnace slag, an activator and 0 to 10% by weight of clinker.
- the hydraulic binder consists of a blast furnace slag and an activator as described above.
- the nitric acid salts are alkali or alkaline earth metal salts.
- the nitric acid salts are calcium or sodium salts, preferably calcium salts.
- the quantity of nitric acid or one of its salts in the hydraulic binder composition is between 0.1 and 5% by dry weight, preferably between 1.0 and 2.5% by dry weight, relative to the total weight of hydraulic binder.
- the quantity of nitric acid or one of its salts in the hydraulic binder composition (CLH) is between 0.1 and 1.5% by dry weight, relative to the total weight of hydraulic binder.
- the hydraulic binder composition may also comprise a polymer (P) comprising units of formulas (I) and (II) following: in which :
- R 1 and R 2 independently represent hydrogen or methyl
- R 3 represents hydrogen or a group of formula -COO(M)i/ m
- R 4 represents a group of formula -(CH 2 ) P -(OAIk)qR 5 in which:
- each OAlk unit of the group -(OAIk) q - independently represents a linear or branched alkylene comprising from 2 to 4 carbon atoms
- R 5 represents -OH or a linear or branched alkoxyl comprising 1 to 4 carbon atoms
- - R 11 and R 12 independently represent hydrogen or methyl
- - R 13 represents hydrogen or a group of formula -COO(M)i/ m ,
- - b is a number from 0.75 to 0.95, such that (100 x b) represents the molar percentage of units of formula (II) within the polymer.
- the CLH composition comprises from 0.1 to 3.0% by dry weight of polymer (P), preferably from 0.3 to 1.0% by dry weight of polymer (P), relative to the total weight. of hydraulic binder.
- total weight of hydraulic binder means the weight of the alumino-siliceous compounds, the activator, the clinker if present, and the mineral additions if they are present.
- - Alk represents -CH 2 -CH 2 -, -CH 2 -CH 2 -CH 2 -, -CH 2 -CH 2 -CH 2 -, -CH 2 -CHMe-, - CHMe-CH 2 -,
- - q represents an integer from 5 to 200, in particular from 10 to 100, preferably from 25 to 75,
- R 5 represents -OH or -OMe, preferably R 5 represents -OH,
- - R 12 represents H
- - M represents H or a monovalent or bivalent cation
- the monovalent cation being preferably chosen from an ammonium salt NH 4 + , a primary, secondary, tertiary or quaternary ammonium cation and a cation of an alkali metal, such as a sodium, lithium or potassium ion
- the bivalent cation preferably being a cation of an alkaline earth metal, such as a magnesium or calcium ion
- - a is a number from 0.05 to 0.20, preferably a represents a number between 0.10 and 0.20,
- - b is a number from 0.80 to 0.95, preferably b represents a number between 0.80 and 0.90.
- the units of formula (I) of the polymer (P) have the following formula (I'): in which :
- R 2 independently represents hydrogen or methyl, preferably methyl
- R' 4 represents a group of formula -CH2-(O-CH 2 -CH 2 )q-R5 in which:
- - R 5 represents -OH or -OMe, preferably -OH
- - a is a number from 0.05 to 0.25, such that (100 x a) represents the molar percentage of units of formula (I’) within the polymer (P).
- the units of formula (II) of the polymer (P) have the following formula (II'): in which :
- R 12 represents hydrogen or methyl, preferably hydrogen
- the polymer (P) comprises units of formulas (I’) and (II’).
- - q represents an integer from 5 to 200, in particular from 10 to 100, preferably from 25 to 75,
- - b is a number from 0.80 to 0.95, preferably b represents a number between 0.80 and 0.90,
- the polymer (P) consists of the units of formulas (I) and (II). It does not include any additional unit in addition to those of formula (I) and (II). The sum of a and b is then equal to 1.
- the weight average molar mass of the polymer is generally 10,000 to 200,000 g/mol, in particular 10,000 to 100,000 g/mol.
- the polymer (P) is obtained by free radical polymerization.
- the polymer (P) is therefore a comb polymer whose pendant groups are linked to the main carbon chain by ether groups.
- the hydraulic binder composition may also comprise polyalkoxylated polyphosphonate-based polymers, preferably in a proportion of between 0.1 and 3.0% by dry weight relative to the total weight of hydraulic binder possibly comprising mineral additions. , preferably from 0.3 to 1.0% by dry weight, in particular described in patent EP0663892 (for example CHRYSOOFluid Optima 100).
- the polyalkoxylated phosphonate is preferably a polyalkoxylated phosphonate polymer of formula (V) or one of its salts, alone or in mixture: in which :
- R5 is a hydrogen atom or a monovalent hydrocarbon group comprising from 1 to 18 carbon atoms and optionally one or more heteroatoms;
- the Ri are similar or different from each other and represent an alkylene such as ethylene, propylene, butylene, amylene, octylene or cyclohexene, or an arylene such as styrene or methylstyrene, the Ri optionally contain one or several heteroatoms;
- Q is a hydrocarbon group comprising 2 to 18 carbon atoms and optionally one or more heteroatoms
- A is an alkylidene group having 1 to 5 carbon atoms; the Rj are similar or different from each other and can be chosen from:
- m is a number greater than or equal to 0
- y is an integer between 1 and 3
- Q, N and Rj can together form one or more rings, this or these rings may also contain one or more other heteroatoms.
- the polyalkoxylated phosphonate consists of a water-soluble or water-dispersible organic compound comprising at least one amino-di-(alkylene-phosphonic) group and at least one polyoxyalkylated chain or at least one of its salts.
- the polyalkoxylated phosphonate is a compound of formula (V) in which:
- R 5 is a hydrogen atom or a monovalent hydrocarbon group, saturated or not, comprising from 1 to 8 carbon atoms and optionally one or more heteroatoms;
- the Ri represent ethylene or propylene or a mixture of ethylene or propylene, preferably 60 to 100% of the Ri are ethylene groups;
- Q is a hydrocarbon group comprising 2 to 8 carbon atoms and, optionally, one or more heteroatoms;
- A is the methylene group; each of the Rj represents the CH2-PO3H2 group; m is an integer between 10 and 250; q is an integer equal to 1 or 2; y is an integer equal to 1 or 2.
- the polyalkoxylated phosphonate may be a polyalkoxylated phosphonate of formula (V) in which R5 is a methyl group, the Ri are ethylene and propylene groups, m being between 30 and 50, r+q is 1, Q is a ethylene group, A is a methylene group, y is 1 and Rj corresponds to the CH2-PO3H2 group.
- V polyalkoxylated phosphonate of formula (V) in which R5 is a methyl group, the Ri are ethylene and propylene groups, m being between 30 and 50, r+q is 1, Q is a ethylene group, A is a methylene group, y is 1 and Rj corresponds to the CH2-PO3H2 group.
- the hydraulic binder composition (CLH) according to the invention comprises from 0 to 3.0% by dry weight of polymer (P), preferably from 0 to 1% by dry weight of polymer (P), relative to the total weight of hydraulic binder.
- the present application also relates to the use of nitric acid or one of its salts, with the exception of zinc nitrate, as defined above, for the preparation of a hydraulic binder composition as defined below. -above or for the preparation of a hydraulic composition as defined above by adding nitric acid or one of its salts to a hydraulic binder composition comprising a hydraulic binder as defined above or to a composition comprising a hydraulic binder as defined above, water and optionally at least one aggregate.
- the use according to the invention makes it possible to improve the maintenance of fluidity of the hydraulic compositions compared to the same hydraulic composition not comprising nitric acid or one of its salts.
- the present invention also relates to the use of the hydraulic binder composition (CLH) defined above for the preparation of a hydraulic composition (CH).
- the invention also relates to a hydraulic composition (CH) comprising (or even consisting of) the hydraulic binder composition (CLH) defined above, water, optionally at least one aggregate.
- CH hydraulic composition
- CLH hydraulic binder composition
- the present invention relates to a hydraulic composition (CH) comprising:
- a hydraulic binder comprising at least one alumino-siliceous compound, preferably blast furnace slag, and an alkaline or sulfate activator and a maximum of 10% by weight of clinker, preferably between 0 and 10% by weight of clinker, and possibly mineral additions as described above; some water ;
- nitric acid or one of its salts with the exception of zinc nitrate possibly at least one aggregate; nitric acid or one of its salts with the exception of zinc nitrate.
- alumino-siliceous compound the activator and the mineral additions being as defined above.
- the hydraulic composition may further comprise a polymer (P) as defined above.
- the hydraulic binder, the nitric acid and its salts, the activator, the mineral additions, as well as the polymer (P) are as defined above.
- the hydraulic composition may further comprise a polymer based on polyalkoxylated polyphosphonates, preferably in a proportion of between 0.1 and 3.0% by dry weight relative to the weight of hydraulic binder, preferably from 0.3 to 1, 0% by dry weight. This polymer is as described above.
- the quantity of nitric acid or one of its salts in the hydraulic composition is between 0.1 and 5% by dry weight, preferably between 1.0 and 2.5% by dry weight, relative to the total weight. of hydraulic binder.
- the quantity of nitric acid or one of its salts in the hydraulic composition is between 0.1 and 1.5% by dry weight, relative to the total weight of hydraulic binder.
- the hydraulic composition comprises from 0 to 3.0% by dry weight of polymer (P), preferably from 0 to 1.0% by dry weight of polymer (P), relative to the total weight of hydraulic binder.
- the hydraulic composition is preferably a composition of concrete, mortar or screed.
- aggregates we mean a set of mineral grains with an average diameter of between 0 and 125 mm. Depending on their diameter, aggregates are classified into one of the following six families: fillers, sand, sand, gravel, gravel and ballast (XP P 18-545 standard). The most commonly used aggregates are:
- - fillers which have a diameter less than 2 mm and for which at least 85% of the aggregates have a diameter less than 1.25 mm and at least 70% of the aggregates have a diameter less than 0.063 mm, including sand with a diameter between 0 and 4 mm (in standard 13-242, the diameter can be up to 6 mm),
- Sands are therefore included in the definition of aggregate according to the invention.
- the fillers can in particular be of limestone or dolomitic origin.
- additives can be added to the hydraulic composition (CH) according to the invention, such as anti-air entrainment additives, anti-foaming agents, a setting accelerator or retarder, a rheology modifying agent, another fluidizer (plasticizer or superplasticizer).
- the present application also relates to a process for preparing a hydraulic composition according to the invention in which nitric acid or one of its salts, with the exception of zinc nitrate, the possible polymer (P) and the possible polymer based on polyalkoxylated polyphosphonate, are added to the hydraulic binder.
- the present application also relates to a process for preparing a hydraulic composition according to the invention in which nitric acid or one of its salts, with the exception of zinc nitrate, the possible polymer (P) and the possible polymer based on polyalkoxylated polyphosphonate, is added with the water, for example to the mixing water.
- the hydraulic compositions are prepared in a conventional manner by mixing the aforementioned constituents.
- the polymer (P) according to the invention, and where appropriate the polymer based on polyalkoxylated polyphosphonate, can be added to the components of the hydraulic composition dry (generally in powder) or in solution, preferably in aqueous solution.
- the water in said aqueous solution can be the mixing water or the pre-wetting water (part of the total water which is used to moisten the aggregates before mixing making it possible to simulate the hygrometric state of the aggregates, often humid, in a concrete plant or on the construction site.
- the present invention also relates to the use of nitric acid or one of its salts, with the exception of zinc nitrate, for the preparation of a hydraulic composition
- a hydraulic binder comprising at least one aluminosiliceous compound, preferably blast furnace slag, and an alkaline or sulfate activator and a maximum of 10% by weight of clinker, preferably between 0 and 10.0% by weight of clinker, and possibly mineral additions as described above, water, possibly at least one aggregate.
- the hydraulic binder, the nitric acid and its salts, the activator, the mineral additions are as defined above.
- the present invention also relates to the use of nitric acid or one of its salts, with the exception of zinc nitrate, to improve the fluidity, in particular the maintenance of workability, of a hydraulic composition
- a hydraulic composition comprising comprising at least an alumino-siliceous compound, preferably blast furnace slag, and an alkaline or sulfate activator and a maximum of 10% by weight of clinker, preferably between 0 and 10.0% by weight of clinker, and possibly mineral additions as described above, water, optionally at least one aggregate.
- the hydraulic binder, the nitric acid and its salts, the activator, the mineral additions are as defined above.
- the quantity of nitric acid or its salts added in the hydraulic composition is between 0.1 and 5% by dry weight, preferably between 0.5 and 1.5% by dry weight, relative to the total weight of binder. hydraulic.
- the quantity of polymer (P) added where appropriate in the hydraulic composition is between 0.1 and 3.0% by dry weight of polymer (P), preferably from 0.3 to 1.0% by dry weight. dry weight of polymer (P), relative to the total weight of hydraulic binder.
- the use according to the invention allows the improvement of the maintenance of fluidity (also called maintenance of workability) over time of the hydraulic composition compared to the same hydraulic composition not comprising nitric acid or its constituents. salts.
- This improvement in maintaining fluidity is as described above and makes it possible to obtain mechanical resistances at 24 hours of the same order of magnitude as a control not using the solution.
- a polymer based on polyalkoxylated polyphosphonate as described above can also be added in particular in the proportions mentioned above.
- the present invention also relates to a method for improving the maintenance of fluidity (also called maintenance of workability) over time of a hydraulic composition
- a hydraulic binder comprising comprising at least one alumino-siliceous compound, preferably high-grade slag. furnaces, and an alkaline or sulfate activator and a maximum of 10% by weight of clinker, preferably between 0 and 10% by weight of clinker, and possibly mineral additions as described above, water, optionally with less an aggregate, comprising the addition of nitric acid or one of its salts, with the exception of zinc nitrate as defined above.
- the hydraulic binder is as defined above.
- the process according to the invention comprises the addition of 0.1 to 5% by dry weight, preferably from 1.0% to 2.5% by dry weight, relative to the total weight of hydraulic binder, d nitric acid or one of its salts.
- the process according to the invention comprises the addition of 0.1 to 1.5% by dry weight, relative to the total weight of hydraulic binder, nitric acid or one of its salts.
- the process of the invention may also comprise the addition of a polymer (P) as defined above.
- the process according to the invention where appropriate comprises the addition of 0.1% to 3.0% by dry weight of polymer (P), preferably from 0.3 to 1.0% by dry weight of polymer (P), relative to the weight of hydraulic binder.
- the nitric acid and its salts, and the polymer (P) are as described above.
- the activator and mineral additions are as described above.
- the process of the invention may further comprise the addition of polyalkoxylated polyphosphonate polymers, preferably in a proportion of between 0.1 and 3.0% by weight relative to the weight of hydraulic binder, preferably 0 .3 to 1.0% by weight. These polymers are as described above.
- Nitric acid or its salts can be added to the hydraulic binder, and optionally the polymer (P) and the possible polymer based on polyalkoxylated polyphosphonate is added to the water, called mixing water.
- the polymer (P) according to the invention, and where appropriate the polymer based on polyalkoxylated polyphosphonate, can be added to the components of the hydraulic composition dry (generally in powder) or in solution, preferably in aqueous solution.
- the water in said aqueous solution can be the mixing water or the pre-wetting water (part of the total water which is used to moisten the aggregates before mixing making it possible to simulate the hygrometric state of the aggregates, often humid, in a concrete plant or on the construction site.
- Nitric acid or its salts as well as, where appropriate, the polymer (P) and the possible polymer based on polyalkoxylated polyphosphonate can be added to the hydraulic binder.
- the mortar is kept in a Perrier type mixer rotating continuously at 43 rpm.
- the slump measurements at the 700 cm 3 cone are carried out at 5 min and 25 min after the start of mixing: to do this, the mixer is stopped for the time to fill the cone, then it is restarted.
- a quantity of mortar is placed in several sections of PVC pipe with a diameter of 44 mm and a height of 99 mm.
- the mortar is leveled then a cover topped with a mass is added to prevent any evaporation and leakage of mortar through the bottom of the pipe.
- composition of the binder is given in the following table:
- Example 2 over-sulphated cement mortars
- the composition of the binder here is as follows:
- Example 3 cement mortars of type CEM lll/C activated by an alkaline compound
- the binder is composed as follows:
- the fluidity is slightly improved by the invention with spreads slightly higher than the control and a time before thixotropic stiffening which is a little longer than 15 min.
- the resistances are reduced by 5 to 7 MPa, but remain within an acceptable range.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2202087A FR3133393A1 (fr) | 2022-03-10 | 2022-03-10 | Composition de liant hydraulique de laitiers de hauts fourneaux |
| PCT/EP2023/056109 WO2023170251A1 (fr) | 2022-03-10 | 2023-03-10 | Composition de liant hydraulique de laitiers de hauts fourneaux |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4490120A1 true EP4490120A1 (fr) | 2025-01-15 |
Family
ID=81580661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23709723.3A Pending EP4490120A1 (fr) | 2022-03-10 | 2023-03-10 | Composition de liant hydraulique de laitiers de hauts fourneaux |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20250187984A1 (fr) |
| EP (1) | EP4490120A1 (fr) |
| CN (1) | CN119173488A (fr) |
| AU (1) | AU2023229974A1 (fr) |
| CA (1) | CA3245514A1 (fr) |
| FR (1) | FR3133393A1 (fr) |
| MX (1) | MX2024010943A (fr) |
| WO (1) | WO2023170251A1 (fr) |
| ZA (1) | ZA202406866B (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2696736B1 (fr) | 1992-10-12 | 1994-12-30 | Chryso | Fluidifiants pour suspensions aqueuses de particules minérales et pâtes de liant hydraulique. |
| US5732363A (en) * | 1994-10-27 | 1998-03-24 | Jgc Corporation | Solidifying material for radioactive wastes, process for solidifying radioactive wastes and solidified product |
| US7141112B2 (en) * | 2003-01-31 | 2006-11-28 | Douglas C Comrie | Cementitious materials including stainless steel slag and geopolymers |
| FR2943053B1 (fr) * | 2009-03-12 | 2012-05-25 | Chryso | Systeme d'adjuvants pour beton prefabrique |
| AU2018383125B2 (en) * | 2017-12-15 | 2024-08-01 | The Catholic University Of America | Control of time of setting of geopolymer compositions containing High-Ca reactive aluminosilicate materials |
-
2022
- 2022-03-10 FR FR2202087A patent/FR3133393A1/fr active Pending
-
2023
- 2023-03-10 CN CN202380039087.0A patent/CN119173488A/zh active Pending
- 2023-03-10 US US18/844,833 patent/US20250187984A1/en active Pending
- 2023-03-10 EP EP23709723.3A patent/EP4490120A1/fr active Pending
- 2023-03-10 WO PCT/EP2023/056109 patent/WO2023170251A1/fr not_active Ceased
- 2023-03-10 AU AU2023229974A patent/AU2023229974A1/en active Pending
- 2023-03-10 CA CA3245514A patent/CA3245514A1/fr active Pending
-
2024
- 2024-09-05 ZA ZA2024/06866A patent/ZA202406866B/en unknown
- 2024-09-06 MX MX2024010943A patent/MX2024010943A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023170251A1 (fr) | 2023-09-14 |
| CN119173488A (zh) | 2024-12-20 |
| US20250187984A1 (en) | 2025-06-12 |
| FR3133393A1 (fr) | 2023-09-15 |
| ZA202406866B (en) | 2025-04-30 |
| CA3245514A1 (fr) | 2023-09-14 |
| AU2023229974A1 (en) | 2024-09-19 |
| MX2024010943A (es) | 2024-12-06 |
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