WO2017162698A1 - Additif - Google Patents

Additif Download PDF

Info

Publication number
WO2017162698A1
WO2017162698A1 PCT/EP2017/056743 EP2017056743W WO2017162698A1 WO 2017162698 A1 WO2017162698 A1 WO 2017162698A1 EP 2017056743 W EP2017056743 W EP 2017056743W WO 2017162698 A1 WO2017162698 A1 WO 2017162698A1
Authority
WO
WIPO (PCT)
Prior art keywords
additive
alkaline
calcium
clinker
water
Prior art date
Application number
PCT/EP2017/056743
Other languages
German (de)
English (en)
Inventor
Dieter Honert
Thomas Müller
Matthias Dietrich
Original Assignee
Sika Technology Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sika Technology Ag filed Critical Sika Technology Ag
Priority to EP17712146.4A priority Critical patent/EP3461271A1/fr
Publication of WO2017162698A1 publication Critical patent/WO2017162698A1/fr

Links

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
    • 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
    • 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
    • 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
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • 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
    • C04B2103/52—Grinding aids; Additives added during grinding

Definitions

  • the invention relates to an additive, in particular for activating clinker substitutes and a composition prepared therefrom, in particular a mineral binder composition. Furthermore, the invention relates to methods for grinding mineral solids and uses of an additive as a cement additive in cement production and as a concrete additive.
  • silicate-containing clinker substitutes in particular slags, fly ash, silica fume and pozzolans.
  • Such clinker substitutes have latent hydraulic and / or pozzolanic properties.
  • the rate of hydration of clinker substitutes too increase.
  • One possibility often described is the acceleration of the hydration of the cement clinker, which in turn causes the hydration of the cement
  • compositions with which, in particular, latent hydraulic and pozzolanic binders can be activated. These are based on compositions containing
  • compositions contain e.g. Sodium hydroxide, calcium sulfate, calcium nitrate optional and
  • Calcium carbonate In another example, calcium hydroxide is used in
  • the object of the present invention is therefore to provide solutions which use of clinker substitutes in blended cements or facilitate or improve mineral binder compositions.
  • clinker substitutes should be better activated, so that the potential of clinker substitutes can be used as efficiently as possible in terms of strength development.
  • the hardening of mineral binder compositions is to be accelerated by the use of clinker substitutes, in particular slags, fly ash, silica fume and natural pozzolans.
  • clinker substitutes in particular slags, fly ash, silica fume and natural pozzolans.
  • the additive according to the invention which is particularly suitable for activating clinker substitutes, accordingly comprises: a) an alkaline alkaline earth metal compound, in particular an alkaline calcium compound, and b) a water-soluble carbonate.
  • alkaline alkaline earth metal compound in particular alkaline
  • novel additives can be stored, transported and used without complex safety precautions. Due to the fact that the additives are essentially free of
  • Sulfates can be produced and used, the content of
  • compositions according to the invention to specifically increase the compressive strengths of mineral binder compositions containing clinker substitutes at early times, in particular after 1 or days, and / or at late times, in particular after 28 days.
  • both the compressive strengths at early times (1 or 2 days) and the compressive strengths at late times (28 days) can be increased.
  • Binder compositions are less problematic.
  • novel additives if necessary, to potentially problematic substances such as sulfates, NaOH and
  • the invention relates to an additive which is particularly suitable for the activation of clinker substitutes and includes the following components: a) an alkaline alkaline earth metal compound, in particular an alkaline calcium compound, and b) a water-soluble carbonate.
  • the additive consists of the two components mentioned.
  • the alkaline earth alkaline metal compound is a basic one
  • Alkaline earth metal The alkaline earth alkaline metal compound can also be mixtures of
  • alkaline earth metals may contain different alkaline earth metals and / or there may be several different alkaline earth alkali metal compounds.
  • the alkaline earth metal compound is an alkaline earth metal oxide.
  • alkaline earth metal oxides When using alkaline earth metal oxides, a particularly effective activation of clinker substitutes can be achieved.
  • the alkaline alkaline earth metal compound contains as alkaline earth metals calcium and / or magnesium, more preferably calcium.
  • the alkaline earth alkaline metal compound is an alkaline calcium compound and / or an alkaline magnesium compound. There may also be mixtures of an alkaline calcium compound and an alkaline magnesium compound.
  • the alkaline earth alkaline metal compound comprises or consists of an alkaline calcium compound.
  • the alkaline calcium compound comprises at least one member selected from the group consisting of calcium oxide, calcium hydroxide, calcium acetate, calcium dihydrogen phosphate, calcium propionate and
  • Calcium formate or mixtures thereof is calcium oxide and / or calcium hydroxide.
  • Especially advantageous is calcium oxide or CaO.
  • it is magnesium oxide and / or magnesium hydroxide.
  • magnesium oxide or MgO is especially advantageous.
  • alkaline alkaline earth metal compounds are demanch calcium oxide and / or magnesium oxide.
  • the said calcium compound or magnesium compounds can also be present as mixed forms which contain both calcium and magnesium atoms.
  • An example of such a hybrid is
  • the alkaline alkaline earth metal compound, in particular the alkaline calcium compound, in particular calcium oxide very particularly preferably has a specific surface area of 1 to 50 m 2 / g, preferably 1 to 5 to 30 m 2 / g, in particular 1 to 9 to 10 m 2 / g on.
  • the determination of the specific Surface is carried out in particular by the BET method (N 2 adsorption, measured according to DIN ISO 9277: 2003-05). A high specific surface leads to an improvement of the activation effect. In order to achieve the same effect, proportionally less alkaline can be obtained compared with alkaline earth alkaline alkaline compounds having a low specific surface area
  • Alkaline earth metal compound can be used with high specific surface area.
  • carbonate in the present case salts and / or esters of
  • Carbonic acid meant.
  • they are salts.
  • the hydrogencarbonates which are also called primary carbonates (MHCO3, based on the hydrogencarbonate anion HCO3 " ) and
  • the secondary carbonates (M2CO3 based on the carbonate anion CO 3 2 " ).
  • M stands for a metal ion, an ammonium group which may optionally be substituted, or a mixture thereof. Different metal ions or metal ions and ammonium groups may be mixed.
  • the ammonium group is in particular a group of the formula NH 4 + .
  • substituted ammonium groups such as alkyl and / or
  • Alkanol groups carrying ammonium groups in particular with 1-10
  • Carbon atoms present Corresponding to carbonates and / or Hyxrogencarbonate be used with deratigen ammonium groups. For example in the form of ethanol-ammonium carbonate and / or triethanolammonium hydrogencarbonate.
  • the water-soluble carbonate is preferably a secondary carbonate or a compound of the formula M2CO3.
  • a "water-soluble carbonate” in the present context stands for a carbonate which has a solubility of at least 10 g / l of water at 20 ° C. and a pressure of 101 .325 Pa. The solubility of the water-soluble carbonate in water is thus in the
  • the latter has a solubility of only 14 mg / l in water at 20 ° C.
  • the solubility of the water-soluble carbonate is preferably at least equal to 33 g / l of water, more preferably at least 100 g / l of water, more preferably at least 150 g / l of water, most preferably at least 200 g / l of water, in particular at least 300 g / l of water or at least equal to 500 g / l of water.
  • the water-soluble carbonate advantageously comprises at least one member selected from the group consisting of alkali metal carbonates,
  • Ammonium hydrogencarbonates or mixtures thereof are Ammonium hydrogencarbonates or mixtures thereof.
  • Ammonium group is in particular a group of the formula NH + .
  • the formula NH + is a group of the formula NH + .
  • the water-soluble carbonate comprises an alkali metal or is in the form of an alkali metal carbonate. More preferably, the alkali metal is sodium and / or potassium.
  • the at least one water-soluble carbonate comprises sodium carbonate (Na 2 CO 3 ) and / or potassium carbonate (K 2 CO 3 ).
  • sodium carbonate (Na 2 CO 3 ) and / or potassium carbonate (K 2 CO 3 ).
  • sodium carbonate (Na 2 CO 3 ) and / or potassium carbonate (K 2 CO 3 ).
  • sodium carbonate (Na 2 CO 3 ) is particularly preferred.
  • the alkaline alkaline earth metal compound especially the alkaline one
  • Calcium compound, and the water-soluble carbonate are particularly selected so that, if added to an aqueous medium, in a Temperature of 20 ° C in an exothermic reaction form calcium carbonate (CaCOs).
  • the additive contains a combination of an alkali metal carbonate and a mineral and / or inorganic calcium compound. Especially preferred are sodium carbonate and calcium oxide.
  • water-soluble carbonate is advantageously in the range of 1: 2 - 2: 1,
  • alkaline earth alkaline metal compounds a) an alkaline earth metal oxide in combination with a secondary carbonate; b) An alkaline calcium compound and / or an alkaline
  • Magnesium compound in combination with a secondary carbonate c) calcium oxide and / or magnesium oxide in combination with a
  • the alkaline alkaline earth metal compound which is in particular an alkaline calcium compound, and / or the water-soluble carbonate are advantageously present as a solid, in particular as a free-flowing solid.
  • the solid may e.g. as powders, flakes, tablets, pellets and / or blocks.
  • the additive is as a whole as a solid,
  • an average particle size is in particular 0.01-100 ⁇ , preferably 0.1-100 ⁇ , special 1-50 ⁇ .
  • the particle size, their distribution or the average particle size can
  • As measuring medium e.g. Isopropanol suitable.
  • average particle size here corresponds in particular to the D50 value (50% of the particles are smaller than the specified value, 50%
  • a content of water in the additive, based on the total weight of the additive, is in particular less than 5 wt .-%, in particular less than 2 wt .-%, preferably less than 1 wt .-%, especially less than 0.5 wt .-% or less than 0.1% by weight. This is especially preferred
  • this contains less than 5% by weight, in particular less than 2 wt .-%, preferably less than 1 wt .-%, in particular less than 0.1 wt .-% alkali metal hydroxides, in particular NaOH and / or KOH.
  • the additive contains, based on the total weight of the additive, less than 5 wt .-%, in particular less than 2 wt .-%, preferably less than 1 wt .-%, in particular less than 0.1 wt .-%, alkaline earth metal carbonates, in particular calcium carbonate (CaCO 3 ).
  • alkaline earth metal carbonates in particular calcium carbonate (CaCO 3 ).
  • the additive is substantially free of such substances. These are in particular alkaline earth metal carbonates in solid form.
  • the additive contains, based on the total weight of the additive, less than 5 wt .-%, in particular less than 2 wt .-%, preferably less than 1 wt .-%, in particular less than 0.1 wt .-%, metal sulfates, especially calcium sulphate, in particular calcium sulfate
  • Hemihydrate or CaSO 4 ⁇ 0.5 H 2 O. the additive is substantially free of such substances particularly preferred.
  • the additive contains, based on the total weight of the additive, less than 5% by weight, in particular less than 2% by weight, preferably less than 1% by weight, in particular less than 0.1% by weight, of hydraulic Binders, in particular cement, in particular
  • the additive is substantially free of such substances.
  • the additive comprises: a) 10-90% by weight, in particular 25-75% by weight, preferably 30-50% by weight, of the alkaline earth-alkaline metal compound, in particular the alkaline calcium compound; b) 10-90% by weight, in particular 25-75% by weight, preferably 55-70% by weight, of the water-soluble carbonate, in each case based on the total weight of the additive.
  • the admixture contains 30-40% by weight, in particular 34-36% by weight, calcium oxide and 60-70% by weight, 64-67% by weight.
  • the at least one retarder particularly advantageously comprises at least one hydroxycarboxylic acid and / or at least one carbohydrate. Hydroxycarboxylic acids are particularly advantageous.
  • the retarder is selected from the group comprising
  • Tartaric acid citric acid, lactic acid, fructose, sucrose, glucose, lactose, mannose, ribose, galactose, fucose, rhamonose, lactulose, maltose, trehalose, melezitose, raffinose, molasses, caramel and
  • the inventive additives are generally well compatible with such retarders. This allows, for example, a flexible adaptation to special uses.
  • a weight ratio of the at least one retarder to the alkaline alkaline earth metal compound, in particular the alkaline Calcium compound in the range of 100: 1 - 1: 100, preferably 50: 1 - 1: 50, in particular 10: 1-1: 10 or 2: 1 - 1: 2.
  • the at least one retarder is preferably used in a proportion of 0.001-10 wt.%, In particular 0.01-5 wt.%, Especially 0.1-2 wt.%, In particular 0.5-1 wt. -%, used.
  • the additive according to the invention is used in combination with a concrete additive and / or a mortar additive, and / or process chemicals.
  • a defoamer such as a styrene, a styrene, a styrene, a styrene, a styrene, a styrene, a styrene, a styrene, sulfate, a sulfate, a sulfate, a sulfate, a sulfate, a sulfate, a styrene, styrene, styrene, styrene, styrene, styrene, styrene, styrene, styrene, styrene, styrene, styrene, styrene,
  • Corrosion inhibitor or combinations thereof.
  • the inventive additive can be used as a carrier for the
  • Concrete additives and / or mortar additives act. This is particularly interesting if it is the concrete admixtures and / or
  • Physicochemical properties are not usable in aqueous form. Specifically, these are, for example, highly hygroscopic, storage-unstable or sparingly soluble in water substances. With respect to known support, e.g. from inert carrier materials, are available are the places
  • additives themselves active additives.
  • the additive according to the invention is added to a mineral solid which can be activated by the additive, e.g.
  • Blast furnace slag used as a reactive carrier material for other concrete admixtures and / or mortar admixtures.
  • the inventive additive is used together with a flow agent or condenser or it contains such.
  • suitable flow agents are lignosulfonates, sulfonated naphthalene-formaldehyde condensates, sulfonated melamine-formaldehyde condensates, sulfonated vinyl copolymers, polycarboxylates or mixtures thereof.
  • the flow agent specifically includes a polycarboxylate, especially a polycarboxylate ether.
  • the flow agent is a comb polymer comprising a polycarboxylate backbone attached thereto
  • Chain polyether sides are bonded to the polycarboxylate backbone, in particular via ester, ether, imide and / or amide groups.
  • Advantageous flow agents are e.g. Copolymers of (meth) acrylic acid and / or maleic acid monomers and monomers selected from polyalkylene glycol vinyl ethers, polyalkylene glycol (meth) allyl ethers, or polyalkylene glycol isoprenyl ethers.
  • Particularly suitable are e.g. Copolymers of maleic acid or derivatives thereof, allyl ethers, especially allyl-polyethylene glycols, and vinyl acetate.
  • Corresponding copolymers and their preparation are described, for example, in EP 2 468 696 A1 (Sika Technology AG).
  • Particularly suitable are e.g. are the copolymers P-1 to P-4 as described in paragraphs 0058 to 0061 and Table 1 of EP 2 468 696 A1.
  • copolymers of maleic acid or derivatives thereof, allyl ethers, in particular allyl polyethylene glycols, and (meth) acrylic acid are described in EP 2 522 680 A1 (Sika Technology AG).
  • the copolymers P-1 to P-4 as described in paragraphs 0063 to 0070 and table 1 of EP 2 522 680 A1 are advantageous.
  • suitable polycarboxylate ethers and production processes are disclosed, for example, in EP 1 138 697 B1 on page 7 line 20 to page 8 line 50, and in its examples or in EP 1 061 089 B1 on page 4, line 54 to page 5 line 38 and in their examples.
  • the comb polymer can be prepared in a solid state of aggregation.
  • the disclosures of the patents mentioned in connection with the flow agents are hereby incorporated by reference in particular.
  • Corresponding comb polymers are also sold commercially by Sika für AG under the trade name series ViscoCrete®.
  • a weight ratio of the at least one flow agent to the alkaline alkaline earth metal compound, in particular the alkaline calcium compound is in the range from 100: 1-1: 100, preferably 50: 1-1: 50, in particular 10: 1-1: 10 or 2: 1. 1: 2.
  • the flow agent is preferably used in a proportion of 0.001-10 wt%, in particular 0.01-5 wt%, especially 0.1-2 wt%, in particular 0.5-1 wt%. used.
  • 0.001-10 wt% in particular 0.01-5 wt%, especially 0.1-2 wt%, in particular 0.5-1 wt%. used.
  • the additive according to the invention can basically be present in a wide variety of forms.
  • the individual components of the additive according to the invention can basically be present in a wide variety of forms.
  • the individual components of the additive according to the invention can basically be present in a wide variety of forms.
  • the individual components of the additive according to the invention can basically be present in a wide variety of forms.
  • the individual components of the additive according to the invention can basically be present in a wide variety of forms.
  • Additive as individual components spatially next to each other, especially as a so-called “kit of parts”. But it is also possible to premix one or all components of the additive in solid and / or liquid form.
  • the additive is present as a one-component additive.
  • all components of the additive in solid Form, in particular in free-flowing form, especially preferably in powder form, mixed before.
  • the present invention relates to a
  • Composition in particular a binder composition containing an additive as described above and a mineral solid.
  • composition may e.g. in dry or liquid form or as a fluid or starched with mixing water
  • Binder composition are present.
  • the composition may be used as a cured binder composition, e.g. as a shaped body.
  • a "mineral solid” is in particular an inorganic solid
  • the solid may in principle be present in coarse form, for example as (unground) clinker, and / or already partly ground, in particular a silicate-containing mineral solid in that the mineral solids contain or consist of silicates.
  • the solid is an inorganic substance for construction
  • the solid is a mineral binder, an additive for a mineral binder and / or
  • a “mineral binder” is in particular a binder, in particular an inorganic binder, which reacts in the presence of water in a hydration reaction to solid hydrates or hydrate phases.
  • This can be, for example, a hydraulic binder (eg cement or hydraulic lime), a latent hydraulic binder (eg slag or granulated slag), a pozzolanic binder (eg fly ash, trass or Rice husk ash) and / or a non-hydraulic binder (gypsum or white lime). It is also possible to mix the various binders.
  • a “mineral binder composition” is accordingly a composition containing at least one mineral binder.
  • the mineral solid comprises in particular a cement clinker, a clinker substitute, sand and / or mixtures thereof. Particularly preferred is a cement clinker, a clinker substitute, and / or mixtures thereof. Particularly preferred is a clinker substitute.
  • the mineral solid contains, based on the total weight of the mineral solid, in particular at least 5 wt .-%, preferably at least 10 wt .-%, in particular at least 30 wt .-%, in particular at least 50 wt .-%, more preferably at least 60 wt % or at least 80% by weight of a clinker substitute.
  • Proportion of the clinker substitute at least 95% by weight, at least 99% by weight or 100% by weight.
  • the mineral solid is made up of unavoidable impurities exclusively from a clinker substitute.
  • the cement clinker is in particular a Portland cement clinker or a
  • clinker substitutes are understood in particular to be substances of type I and type II in accordance with standards DIN EN 206-1: 2014-07 and DIN 1045-2: 2014-08.
  • the mineral solid or the clinker substitutes preferably comprise pozzolanic and / or latent hydraulic additives. These can also be referred to as additives of type II according to standards DIN EN 206-1: 2014-07 and DIN 1045-2: 2014-08.
  • the mineral solid consists exclusively of pozzolanic and / or latent hydraulic additives.
  • Particularly preferred as clinker substitutes are blast furnace slag,
  • Blastfurnace slag silica fume, fly ash and / or pozzolans.
  • blast furnace slag it is blast furnace slag.
  • a proportion of the additive based on the mineral solid, in particular the clinker substitute is advantageously in the range from 0.1 to 40% by weight, preferably 1 to 30% by weight, in particular 2 to 20% by weight, especially preferably 3 - 15 wt .-%, most preferably 5 - 10 wt .-%.
  • the present invention also relates to a method, in particular for producing a mineral binder composition, wherein an additive according to the invention is mixed with a mineral solid.
  • the additive becomes a mineral
  • Binders and / or aggregates added Binders and / or aggregates added.
  • Binder composition is in particular a concrete and / or
  • Mortar composition Aggregates are to be understood in particular as sand, gravel and / or aggregates.
  • the individual components of the additive can be added separately or together with the mineral solid.
  • An additional aspect of the present invention relates to a molded article which is obtainable by curing a composition as described above comprising at least one mineral binder and an additive according to the invention after addition of
  • the molded body produced in this way can be virtually any desired Form and, for example, be part of a building, such as a building, a masonry or a bridge.
  • Another aspect of the present invention relates to a method for grinding mineral solids, in particular cement clinker and / or clinker substitutes, wherein an additive as described above with a mineral solid, in particular a
  • silicate-containing mineral solid preferably cement clinker
  • milling or “grinding process” is in particular a
  • Mahleniamühle in particular a ball mill can be used.
  • grinding media millbases and freely moving media are circulated in a process chamber. This results in shocks between the grinding media, the walls of the process chamber and the regrind.
  • the comminution of the ground material takes place in particular by fragmentation and not by a rollover process.
  • the grinding in a roller mill is a mill in which at least one milling tool is arranged on a substantially horizontally rotatable grinding plate or grinding bowl unrollable.
  • the term “roller mill” in the present case also includes “roller mills", “vertical mills” and “vertical roller mills”.
  • the mineral solid in particular cement clinker and / or clinker substitutes, when grinding to a Blaine value of at least 500 cm 2 / g, in particular at least 1 ⁇ 00 cm 2 / g, preferably at least 2 ⁇ 00 cm 2 / g, more preferably at least 2 '500 cm 2 / g, ground.
  • the mineral solid comprises during grinding
  • Blast furnace slag blastfurnace slag, silica fume, fly ash and / or pozzolans, in particular blast furnace slag, are particularly preferred.
  • moist clinker substitutes are ground with an additive according to the invention.
  • Clinker substitutes contain, based on the total weight of the moist clinker substitutes, in particular 0.1 to 20 wt .-%, especially 1 to 15 wt .-%, in particular 5 to 12 wt .-% or 10 wt .-%, moisture in the form of Water.
  • the moisture can be known to those skilled in the art
  • alkaline calcium compound in particular the alkaline calcium compound, with the water-soluble carbonate in the humid environment.
  • calcium oxide reacts with sodium carbonate in the presence of water to calcium carbonate and
  • the additive according to the invention can act as a grinding aid during the grinding process.
  • additives can facilitate the comminution of mineral solids in the mills and / or the To prevent agglomeration of the resulting pul deformed particles. This can cause a large reduction in the grinding time and the energy required for grinding.
  • clinker substitutes are ground in a first step with an additive according to the invention and in a subsequent second step with a
  • cement clinker and / or ground cement mixed In the first step, there is advantageously no cement clinker present. As a result, different mixed cements can be produced in a flexible manner, which contain additives according to the invention adapted to the contained clinker substitutes in a suitable amount. These methods are characterized by a high degree of flexibility. In another advantageous method, clinker substitutes and cement clinker are ground together with an additive according to the invention. In this case, can be in a single grinding process
  • the present invention relates to various uses of the inventive additive.
  • the additive can be used as a cement additive in cement production.
  • the inventive additive as a concrete and / or mortar additive in the production of a mineral
  • Binder composition in particular a concrete and / or
  • the admixture can be used in particular for the activation of
  • Use clinker substitutes especially for the activation of latent hydraulic and / or pozzolanic additives.
  • Particularly preferred are blast furnace slags, fly ash, silica fume and / or pozzolans, in particular blast furnace slags.
  • the additive can be used to increase the compressive strength of mineral binder compositions.
  • the additive is used to increase the compressive strength after 6 hours, 1 day, 2 days and / or 28 days. Most preferably, the additive is used to increase the compressive strength after 6 hours, 1 day, 2 days and 28 days at the same time.
  • Such activated sand can be used, for example, as a clinker substitute or as a cement substitute (SCM;
  • supplementary / cementitious material The activation is based in particular on an alkali-aggregate reaction.
  • the additive according to the invention can be used for drying clinker substitutes.
  • silicate-containing mineral solids preferably of cement clinker, clinker substitutes and / or sand.
  • inventive additive as a carrier material for other concrete admixtures and / or mortar additives.
  • An additive Z consisting of 34.6% by weight of powdered calcium oxide (CaO) and 65.4% by weight of powdered sodium carbonate (Na 2 CO 3) was prepared.
  • the substances are available from various suppliers in pure form (purity> 97%).
  • the additive Z was then used in a conventional ball mill with a proportion of 8 wt .-% in the grinding of wet blast furnace slag and ground to a fineness Blaine of about 3'500 cm 2 / g. Additional measures for drying were not required.
  • the blast furnace slag thus obtained is hereinafter referred to as H1.
  • the blast furnace slag H1 was mixed with already ground Portland cement (type CEM I) to form a mixed cement M1.
  • the proportion of cement was 60 wt .-% and the proportion of blast furnace slag H1 40 wt .-%.
  • Additive and water (w / c 0.5) tested.
  • the additives were used in a proportion of 10% by weight, based on the weight of the slag
  • the compressive strengths of the mortar blends were each 1 day (1 day), 2 days (2 days) and 28 days (28 days) after dressing
  • Mortar mixtures determined.
  • the test for determining the compressive strength (in N / mm 2 ) was carried out on prisms (40 x 40 x 160 mm) in accordance with the standards EN 12390-1 to 12390-4.
  • the slump (ABM) of the slag-based mortar mixtures was measured according to standard EN 1015-3 immediately after mixing.
  • compositions presented in Table 3 Significant increases in strength were also observed with the compositions presented in Table 3. Particularly advantageous are the compositions Z30 (Na 2 CO 3 and MgO) and Z32 (K 2 CO 3 and MgO), which particularly increase the strengths at all times. Especially good is composition Z32 (K 2 CO 3 and MgO).
  • compositions significant increases in strength in mortar compositions containing clinker substitutes can be achieved. Depending on
  • composition can specifically increase the strengths too early (especially after 1 d, 2 d), later times (28 d) or at all times (1 d to 28 d) become. In addition, the compositions perform better than
  • Carbonates and / or alkaline alkaline earth metal compounds are used.
  • Ammonium carbonate [(NH 4) 2 CO 3] and / or ammonium
  • the additive can then consist of propylene carbonate and CaO, ammonium carbonate and CaO and / or ammonium bicarbonate and CaO.
  • Magnesium acetate can be used. Accordingly, an additive in this case consists, for example, of magnesium acetate and Na 2 CO 3 .
  • Clinker substitutes and / or binders, e.g. hydraulic binders, especially cement.

Landscapes

  • 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)
  • Crystallography & Structural Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

La présente invention concerne un additif, en particulier pour l'activation de substituts de clinker, contenant : a) un composé de métal alcalino-terreux alcalin, en particulier un composé de calcium alcalin, et b) un carbonate soluble dans l'eau.
PCT/EP2017/056743 2016-03-22 2017-03-21 Additif WO2017162698A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17712146.4A EP3461271A1 (fr) 2016-03-22 2017-03-21 Additif

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16161765 2016-03-22
EP16161765.9 2016-03-22

Publications (1)

Publication Number Publication Date
WO2017162698A1 true WO2017162698A1 (fr) 2017-09-28

Family

ID=55637217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/056743 WO2017162698A1 (fr) 2016-03-22 2017-03-21 Additif

Country Status (2)

Country Link
EP (1) EP3461271A1 (fr)
WO (1) WO2017162698A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190084880A1 (en) * 2016-03-22 2019-03-21 Sika Technology Ag Composition based on calcium oxide
CN109946414A (zh) * 2019-03-27 2019-06-28 东南大学 一种使用水泥基材料氧化物含量表征结合氯离子量的方法
CN112739660A (zh) * 2018-10-02 2021-04-30 Sika技术股份公司 研磨的粒状高炉炉渣的活化

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5728208A (en) * 1995-06-01 1998-03-17 Nadia Rusinoff Concrete mix, process for preparing same, an additive for concrete mix, and process for preparing same
EP1348729A1 (fr) 2002-03-25 2003-10-01 Sika Schweiz AG Polymères en état changeant solide
EP1138697B1 (fr) 2000-03-29 2003-11-05 Sika Schweiz AG Polymères pour compositions dispersantes pour ciment
EP1061089B1 (fr) 1999-06-15 2004-03-03 Sika Schweiz AG Agent polymère dispersant pour ciment à fonctions multiples pour béton à fluidité et résistance élevée
EP2468696A1 (fr) 2010-12-24 2012-06-27 Sika Technology AG Polymère à partir d'acide maléique, allylester et acétate de vinyle, sa fabrication et son utilisation
WO2012126994A1 (fr) 2011-03-23 2012-09-27 Sika Technology Ag Composition d'activation pour liants hydrauliques et/ou pozzolaniques latents
EP2514727A2 (fr) * 2011-04-20 2012-10-24 Consolis Technology Oy Ab Composition de béton de calcaire activé par un alcali et utilisation de la composition dans le coulage de béton
EP2522680A1 (fr) 2011-05-10 2012-11-14 Sika Technology AG Polymère composé d'acide maléique, allylester et (méth-)acryle, sa fabrication et son utilisation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5728208A (en) * 1995-06-01 1998-03-17 Nadia Rusinoff Concrete mix, process for preparing same, an additive for concrete mix, and process for preparing same
EP1061089B1 (fr) 1999-06-15 2004-03-03 Sika Schweiz AG Agent polymère dispersant pour ciment à fonctions multiples pour béton à fluidité et résistance élevée
EP1138697B1 (fr) 2000-03-29 2003-11-05 Sika Schweiz AG Polymères pour compositions dispersantes pour ciment
EP1348729A1 (fr) 2002-03-25 2003-10-01 Sika Schweiz AG Polymères en état changeant solide
EP2468696A1 (fr) 2010-12-24 2012-06-27 Sika Technology AG Polymère à partir d'acide maléique, allylester et acétate de vinyle, sa fabrication et son utilisation
WO2012126994A1 (fr) 2011-03-23 2012-09-27 Sika Technology Ag Composition d'activation pour liants hydrauliques et/ou pozzolaniques latents
EP2514727A2 (fr) * 2011-04-20 2012-10-24 Consolis Technology Oy Ab Composition de béton de calcaire activé par un alcali et utilisation de la composition dans le coulage de béton
EP2522680A1 (fr) 2011-05-10 2012-11-14 Sika Technology AG Polymère composé d'acide maléique, allylester et (méth-)acryle, sa fabrication et son utilisation

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BERNAL SUSAN A ET AL: "Role of carbonates in the chemical evolution of sodium carbonate-activated slag binders", MATERIALS AND STRUCTURES, LONDON, GB, vol. 48, no. 3, 25 September 2014 (2014-09-25), pages 517 - 529, XP035441375, ISSN: 1359-5997, [retrieved on 20140925], DOI: 10.1617/S11527-014-0412-6 *
D V S P RAJESH ET AL: "PERFORMANCE OF ALKALI ACTIVATED SLAG WITH VARIOUS ALKALI ACTIVATORS", INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH IN SCIENCE, ENGINEERING AND TECHNOLOGY, 1 February 2013 (2013-02-01), XP055294035, Retrieved from the Internet <URL:http://www.ijirset.com/upload/february/7_C.pdf> [retrieved on 20160808] *
ELSABE P KEARSLEY ET AL: "Dry powder alkali-activated slag cements", ADVANCES IN CEMENT RESEARCH, 6 February 2015 (2015-02-06), pages 1 - 10, XP055294036, Retrieved from the Internet <URL:http://repository.up.ac.za/dspace/bitstream/handle/2263/50269/Kovtun_Dry_2015.pdf?sequence=3&isAllowed=y> [retrieved on 20160808], DOI: 10.1680/adcr.14.00078 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190084880A1 (en) * 2016-03-22 2019-03-21 Sika Technology Ag Composition based on calcium oxide
US10793471B2 (en) * 2016-03-22 2020-10-06 Sika Technology Ag Composition based on calcium oxide
CN112739660A (zh) * 2018-10-02 2021-04-30 Sika技术股份公司 研磨的粒状高炉炉渣的活化
CN109946414A (zh) * 2019-03-27 2019-06-28 东南大学 一种使用水泥基材料氧化物含量表征结合氯离子量的方法
CN109946414B (zh) * 2019-03-27 2022-03-08 东南大学 一种使用水泥基材料氧化物含量表征结合氯离子量的方法

Also Published As

Publication number Publication date
EP3461271A1 (fr) 2019-04-03

Similar Documents

Publication Publication Date Title
EP1761473B9 (fr) Agent de broyage de ciment
EP3672923B1 (fr) Mousse hybride
WO2001058994A1 (fr) Composition pulverulente a base de polymeres solubles dans l&#39;eau
EP1964824A1 (fr) Accélérateur de prise et de durcissement pour liant hydraulique et son procédé de fabrication
EP2527307A1 (fr) Dialkanolamine comme additif pour le broyage de matières solides
EP3461271A1 (fr) Additif
WO2019180191A1 (fr) Fabrication de nanoparticules d&#39;hydroxyde de calcium et leur utilisation comme accélérateur dans des compositions minérales de liant
EP1795511A1 (fr) Composition et sa utilisation pour améliorer la processibilité des compositions à prise hydraulique
EP1964825A1 (fr) Accélérateur de prise et de durcissement pour liant hydraulique et son procédé de fabrication
EP1004555B1 (fr) Composition de liant hydraulique à prise rapide
EP0603603B2 (fr) Liant hydraulique à prise rapide
EP3433218B1 (fr) Composition à base d&#39;oxyde de calcium
EP1072566B9 (fr) Mélange de liant hydraulique à durcissement rapide et procédé pour sa préparation
EP3204340A1 (fr) Adjuvant pour le broyage dans des broyeurs à cylindres
WO2015022168A1 (fr) Agent entraîneur d&#39;air pour compositions de liant minéral
EP3837323A1 (fr) Agent mouillant efficace par fixation
DE10124149B4 (de) Selbstnivellierende Anhydritfließestrichmischung
WO2021037996A1 (fr) Additif pour compositions de liant minéral
EP3433217B1 (fr) Accelerateur
EP3538499A1 (fr) Accélérateur de durcissement
EP2632871B1 (fr) Activateur hydraulique de laitier granulé
EP4082995B1 (fr) Réduction de la viscosité des suspensions de sulfate d&#39;aluminium avec des composés de métal alcalin
WO2013160158A1 (fr) Saccharose inverti par voie enzymatique utilisé comme agent auxiliaire de broyage
DE29924657U1 (de) Hydraulische Bindemittelmischung

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17712146

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017712146

Country of ref document: EP

Effective date: 20181022