EP2970029A1 - Utilisation d'éthers de polycarboxylates en combinaison avec d'autres additifs pour le broyage de ciment - Google Patents

Utilisation d'éthers de polycarboxylates en combinaison avec d'autres additifs pour le broyage de ciment

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Publication number
EP2970029A1
EP2970029A1 EP14708058.4A EP14708058A EP2970029A1 EP 2970029 A1 EP2970029 A1 EP 2970029A1 EP 14708058 A EP14708058 A EP 14708058A EP 2970029 A1 EP2970029 A1 EP 2970029A1
Authority
EP
European Patent Office
Prior art keywords
group
independently
aqueous composition
salt
cement
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.)
Withdrawn
Application number
EP14708058.4A
Other languages
German (de)
English (en)
Inventor
Dieter Honert
Thomas Heller
Thomas Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sika Technology AG
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 EP14708058.4A priority Critical patent/EP2970029A1/fr
Publication of EP2970029A1 publication Critical patent/EP2970029A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/005—Lignin
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/48—Clinker treatment
    • C04B7/52—Grinding ; After-treatment of ground 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
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/41—Compounds containing sulfur bound to oxygen
    • C08K5/42—Sulfonic acids; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2555/00—Characteristics of bituminous mixtures
    • C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
    • C08L2555/80—Macromolecular constituents
    • C08L2555/82—Macromolecular constituents from natural renewable resources, e.g. starch, cellulose, saw dust, straw, hair or shells
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • the invention relates to the use of cement grinding aids, the cement grinding aid and a method of producing cement using the cement grinding aid.
  • cement is known to be very sensitive to water, regardless of whether it is in liquid or gaseous state, because cement binds hydraulically, that is, it hardens under the influence of water within a short time to a very stable solid.
  • a key step in cement production is grinding the clinker. Since clinker are very hard, the crushing is very complex. It is important for the properties of the cement to be present as a fine powder. That is why the fineness of the
  • Cement grinding aids are usually selected from the class comprising glycols such as alkylene glycols, amines or amino alcohols.
  • glycols such as alkylene glycols, amines or amino alcohols.
  • Triisopropanolamine TIPA or N, N-bis (2-hydroxyethyl) -N- (2-hydroxypropyl) amine and tris (2-hydroxybutyl) amine as a grinding aid for clinker.
  • water-soluble polycarboxylates are known as grinding aids for the preparation of aqueous suspensions of minerals such as lime or pigments, in particular for use in papermaking from WO 97/10308 or EP 0100947 A1.
  • US 2002/0091 177 A1 describes the use of polymers of ethylenically unsaturated monomers as
  • a grinding aid for the preparation of aqueous suspensions of ground mineral fillers Furthermore, this document describes that a cement which is mixed with such an aqueous suspension leads to improved early strength. However, none of these documents disclose a cement grinding aid.
  • concrete liquefiers have long been known.
  • this concrete plasticizer is added to the cement as an additive or added to the cement before grinding, and leads to a strong liquefaction, respectively
  • WO 2005/123621 describes the use of special polycarboxylate ethers, also in combination with glycols, organic amines and ammonium salts of organic amines with carboxylic acids, as a cement grinding aid. It has been found that by combining the specific polycarboxylate ethers with glycols, organic amines and ammonium salts of organic amines with carboxylic acids, the disadvantages of the known grinding aids can be eliminated or greatly reduced without losing the advantageous effects of the polycarboxylate ether. To achieve the desired effect can often relatively large amounts of quite expensive glycols, organic amines and
  • US 6641661 B1 relates to a method for improving the early strength of cement, comprising adding a water reducer comprising a polyoxyalkylene polymer, a sugar, an alkali or alkaline earth metal chloride and an amine to the cement during milling.
  • US 2004/149172 A1 relates to a cement additive comprising a liquid carrier, an alkali or alkaline earth salt as solid particles and another component which may be an amine, alkanolamine, modified polyethyleneamine, glycol, a carbohydrate or a surfactant.
  • the liquid carrier can be a polycarboxylate.
  • WO 201 1/033124 A1 relates to the use of an additive comprising a lignosulfonate for reducing the floating of soot on mineral binders.
  • the additive may contain a polycarboxylate comb polymer.
  • EP 1728771 A2 describes a grinding aid for particles, such as cement, comprising a biomass-derived polyol, and may contain a second grinding aid, which i.a. may be selected from triethanolamine, acetic acid, carbohydrates, polycarboxylate ethers, chlorides, nitrites or nitrates.
  • the object of the invention therefore relates to the provision of a grinding aid with which the efficiency of the grinding of cement can be optimized. Surprisingly, this could be achieved by a combination of a polycarboxylate ether with special additives.
  • the present invention therefore relates to the use of an aqueous composition comprising at least one polycarboxylate ether as a cement grinding aid, wherein the aqueous composition is an or contains a plurality of additives or the aqueous composition is used in combination with one or more additives, and wherein the additive is selected from 1, 3-propanediol, a carboxylic acid, a sulphonated aminoalcohol, boric acid, a salt of boric acid, a salt of phosphoric acid, sorbitol , a saccharide, a gluconate, iron sulphate, tin sulphate, an antimony salt, an alkali metal salt, an alkaline earth metal salt, lignin sulphonate, glycerol, melamine, melamine sulphonate and mixtures thereof.
  • the additive is selected from 1, 3-propanediol, a carboxylic acid, a sulphonated aminoalcohol, bo
  • polycarboxylate ethers added as improvers for cement grinding are not very good grinding aids. It has been found that the polycarboxylate ethers in admixture with the special additives according to the present invention surprisingly have similar milling properties as the pure substances.
  • polycarboxylate ethers have different effects on the processability of fresh concrete or fresh mortar.
  • precast polymers give a high initial liquefaction and strong restraining.
  • Slunnp-Keeper Polynnere give a good initial liquefaction and low stiffening. It has been found that blends of the polycarboxylate ethers can be prepared with the specific admixtures according to the invention, which show the same tendencies as pure polycarboxylate ethers with regard to the workability of the fresh concrete or fresh mortar. Moreover, it was surprising that blends of the polycarboxylate ethers with the specific admixtures according to the invention can be made, which have little effect on processability, such as e.g. Slump, show.
  • these cement additives can be used to adjust the processability of the fresh concrete produced from this cement. Furthermore, it is possible with such blends to increase the grinding efficiency of the cement without the processability of it influenced concrete. Whether or how much the processability is influenced depends, among other things, on the chemical structure of the PCE used. By adding the cement additives according to the invention, the efficiency of the grinding of cement, hydraulic, latent hydraulic, non-hydraulic and / or pozzolanic materials can be increased.
  • the present invention thus relates to cement grinding aids of an aqueous composition containing a polycarboxylate ether in
  • the aqueous composition contains at least one polycarboxylate ether (PCE). All common polycarboxylate ethers can be used.
  • the polycarboxylate ether is in particular a comb polymer which has a polycarboxylate backbone and polyether side chains, the polyether side chains preferably being bound to the polycarboxylate backbone via ester, ether and / or amide groups. If reference is made in the following to the polycarboxylate ether, the statement always applies analogously to the above-mentioned preferred forms and in particular to the comb polymer KP defined below as preferred or particularly preferred embodiments.
  • the polycarboxylate ether is preferably a comb polymer KP comprising or consisting of the following partial structural units:
  • M independently of one another represents H + , an alkali metal ion, alkaline earth metals, a divalent or trivalent metal ion, an ammonium ion or an organic ammonium group,
  • each R u independently of the others for hydrogen or a
  • each R v independently of the others is hydrogen or COOM, m is 0, 1 or 2,
  • R 1 and R 2 independently of one another are a C 1 - to C 20 -alkyl group, -cycloalkyl group, -alkylaryl group or - [AO] n -R 4 ,
  • A is C 2 -C -alkylene
  • R 4 is H, C 1 -C 20 -alkyl, -cyclohexyl or -alkylaryl, and n is 2-250,
  • R 3 independently of one another are NH 2 , -NR 5 R 6 , -OR 7 NR 8 R 9 ,
  • R 5 and R 6 are independently for
  • Acetoxyethyl (CH 3 -CO-O-CH 2 -CH 2 -) or a hydroxyisopropyl- (HO-CH (CH 3 ) -CH 2 -) or a
  • Acetoxyisopropyl group (CH 3 -CO-O-CH (CH 3 ) -CH 2 -);
  • Nitrogen is a part of a morpholine or
  • R 7 is a C 2 -C 4 -alkylene group
  • R 8 and R 9 are each independently a C 1 to C 20 alkyl group, cycloalkyl group, alkylaryl group,
  • a / b / c / d (0.1-0.9) / (0.1-0.9) / (0-0.8) / (0-0.8)
  • the sequence of the partial structural units S1, S2, S3 and S4 can be alternating, block-like or random. In principle, it is also possible that, in addition to the partial structural units S1, S2, S3 and S4, further structural units are present.
  • the partial structural units S1, S2, S3, and S4 together preferably have a weight fraction of at least 50% by weight, in particular at least 90% by weight, very particularly preferably at least 95% by weight, of the total weight of the comb polymer KP.
  • the comb polymer KP is in particular free of aromatic compounds and / or aromatic structural units.
  • a weight-average molecular weight (M w ) of the polycarboxylate ether, preferably of the comb polymer KP, is in particular 5 ⁇ 00 - 150 ⁇ 00 g / mol, in particular 10 ⁇ 00 - 100 ⁇ 00 g / mol.
  • the weight-average molecular weight (Mw) is determined here and below by gel permeation chromatography (GPC) using polyethylene glycol (PEG) as standard.
  • the preparation of comb polymers is known in the art per se and can, for example, by free radical polymerization of the corresponding monomers of the formula (l m), (II m), (lll m) or (IV m) take place, resulting in a Comb polymer KP with the partial structural units S1, S2, S3 and S4 leads.
  • the radicals R u , R v , R 1 , R 2 , R 3 , M, m and p are defined as described above.
  • the polycarboxylic acid of the formula (V) is esterified or amidated with the corresponding alcohols or amines (eg HO-R 1 , H 2 NR 2 , H-R 3 ) and then at most neutralized or partially neutralized (depending on Type of the residue M, for example with metal hydroxides or ammonia).
  • the polymer-analogous reaction Details of the polymer-analogous reaction are disclosed, for example, in EP 1 138 697 B1 on page 7 line 20 to page 8 line 50, as well as in its examples or in EP 1 061 089 B1 on page 4, line 54 to page 5 line 38 and in its the examples.
  • the comb polymer can be prepared in a solid state of aggregation.
  • the open This patent specification is hereby incorporated by reference in particular. The production by polymer anlog
  • Corresponding comb polymers are sold commercially and Sika Switzerland AG under the trade name row ViscoCrete ®.
  • radical R u is hydrogen or a methyl group or a mixture of a methyl group and hydrogen.
  • a molar ratio of the methyl group to the hydrogen is in particular 25:75 to 75:25, in particular 40:60 to 60:40.
  • a molar ratio of the C 2 -alkylene units to the C 3 -alkylene units is in particular 25:75 to 75:25, in particular 40:60 to 60:40.
  • R 4 represents a methyl group and / or
  • the preparation of the aqueous composition is effected by adding water in the preparation of the polycarboxylate ether or by subsequent mixing of polycarboxylate ether with water.
  • the proportion of the polycarboxylate ether in the aqueous composition may vary widely. Typically, the proportion of the polycarboxylate ether is, for example, 5 to 90% by weight, in particular 10 to 50% by weight, based on the weight of the aqueous composition.
  • a dispersion or a solution is formed. A solution is preferred.
  • WO 2005/123621 discloses the use of aqueous compositions comprising a polycarboxylate ether in combination with at least one further grinding assistant selected from the group consisting of glycols, organic amines and ammonium salts of organic amines with carboxylic acids.
  • Suitable glycols, organic amines and ammonium salts of organic amines with carboxylic acids are monoethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, polyethylene glycol, especially with 6 or more ethylene units, e.g. PEG 200, neopentyl glycol, hexylene glycol, propylene glycol, dipropylene glycol,
  • Polypropylene glycol monoethanolamine, diethanolamine, triethanolamine (TEA), diethanolisopropanolamine, ethanol diisopropanolamine, isopropanolamine,
  • the aqueous composition containing a polycarboxylate ether together with one or more specific additives is used as a cement grinding aid, wherein the one or more additives are contained in the aqueous composition are used as a separate component together with the aqueous composition.
  • an aqueous composition containing at least one polycarboxylate in combination with one or more additives is, in this case, the aqueous composition and the one or more Admixtures are present separately and during or preferably before the grinding of the clinker or cement separately from each other to the clinker or cement are added.
  • the additive is selected from 1,3-propanediol, a carboxylic acid, a sulphonated aminoalcohol, boric acid, a salt of boric acid, a salt of phosphoric acid, sorbitol, a saccharide, a gluconate, iron sulphate, tin sulphate, an antimony salt, an alkali salt, an alkaline earth salt .
  • the carboxylic acid is preferably selected from formic acid, acetic acid, propionic acid, lactic acid and citric acid.
  • lignosulfonate includes the substances sodium lignosulfonate (CAS No. 8061-51-6), magnesium lignosulfonate (CAS No. 8061-54-9), calcium lignosulfonate (CAS No. 8061 -52-7).
  • the cation is irrelevant to the efficacy in the present invention.
  • the alkali or alkaline earth metal salt is preferably selected from alkali or alkaline earth halide, alkali or alkaline earth nitrate, alkali or Erdalkalinitrit and alkali or alkaline earth thiocyanate.
  • alkali metal and alkaline earth metal halides are alkali metal and alkaline earth metal chlorides, alkali metal and alkaline earth fluorides, alkali metals and alkaline earth metal halides Alkaline earth bromides and alkali and alkaline earth metal iodides.
  • suitable alkali and alkaline earth metals for these salts are Li, Na, K, Mg and Ca. Specific examples are calcium chloride, sodium chloride, sodium thiocyanate and sodium carbonate.
  • Carbohydrates can be polysaccharides and oligosaccharides or sugars.
  • An example of a gluconate is sodium gluconate.
  • Iron sulphate, tin sulphate and antimony salts are also known as chromate (VI) reducing substances in cements.
  • the aqueous composition may contain at least one further grinding aid or the aqueous composition and the additive or additives may be used in combination with at least one further grinding aid, wherein the further grinding aid is selected from the group consisting of glycols, polyols, organic Amines and ammonium salts of organic amines with carboxylic acids.
  • suitable glycols organic amines and ammonium salts of organic amines with carboxylic acids have been mentioned above.
  • Alkanolamines are particularly preferred as organic amines , especially trialkanolamines, preferably triisopropanolamine (TIPA) or triethanolamine (TEA).
  • the aqueous composition preferably contains, in addition to the polycarboxylate ether, the additive (s) and at least one grinding assistant selected from the group consisting of glycols, organic amines and ammonium salts of organic amines with carboxylic acids.
  • the additive (s) and the at least one grinding assistant may be present in each case as a separate component
  • for the aqueous composition to contain the additive (s) and for the at least one grinding aid to be present as a separate component the aqueous composition contains the at least one grinding assistant and the additive or additives are present as a separate component.
  • the aqueous composition contains the at least one grinding assistant and the additive or additives are present as a separate component.
  • the further grinding aid is an alkanolamine and the additive is a carboxylic acid or a retarder selected from boric acid, a salt of boric acid, a salt of phosphoric acid, sorbitol, a saccharide and a gluconate, wherein the carboxylic acid or the retarder in the aqueous Composition is used or is used in combination with the aqueous composition, wherein the carboxylic acid or the retarder are preferably contained together with the alkanolamine in the aqueous composition.
  • the aqueous composition may contain other ingredients. Examples of these are organic solvents or additives, as described in the
  • aqueous composition is used in combination with the one or more
  • Add additives and optionally the at least one additional grinding aid the clinker or cement before grinding and then ground to cement or finer cement, the or the additives and / or the optional further grinding aid are contained in the aqueous composition or added separately.
  • the addition of the aqueous composition in combination with the additive (s) and optionally the at least one further grinding aid may also be carried out during the milling process. However, it is preferred to add before grinding.
  • the addition may be before, during or after the addition of gypsum and optionally other additives, such as lime, blast furnace slag, fly ash or pozzolans.
  • the aqueous composition can also be used for grinding cement or producing mixed cements. For the latter, individual cements, each separately prepared by grinding with the aqueous composition, may be mixed or a mixture of several cement clinkers is milled with the aqueous composition to obtain a blended cement.
  • the use according to the invention of the aqueous composition in combination with the one or more additives is well suited as a cement grinding aid. It can thus be made of clinker various cements or mowing such cements, such as those classified according to DIN EN 197-1 cements such as CEM I (Portland cement), CEM II, CEM III (blast furnace cement), CEM IV and CEM V. Preferred is CEM II
  • the aqueous composition is preferably metered into the clinker or cement in such a way that the proportion of the polycarboxylate ether is 0.001-1.5% by weight, in particular 0.005-0.2% by weight, preferably 0.005-0.1% by weight, based on the clinker to be ground or the cement to be ground.
  • the milling process usually takes place in a cement mill. However, it is also possible to use other mills, as are known, for example, in the cement industry. Depending on the grinding time, the cement has different fineness. The fineness of cement is typically given by Blaine in cm 2 / g. On the other hand, the fineness of the particle size distribution is also of practical relevance. Such particle size analyzes are usually determined by laser granulometry or air jet sieves.
  • composition in combination with the one or more
  • Adjuvants may be added to the meal to achieve the desired fineness, e.g. the Blaine fineness, be reduced. By the thereby reduced
  • cement grinding aid is obtained, which combines the advantages of polycarboxylate ethers and additives and reduces their disadvantages or even disappears.
  • the cement thus produced can also have a greatly reduced water requirement and excellent early strength, curing properties and a large slump.
  • ground cement like any other milled cement, has a wide application, e.g. in concrete, mortar, potting compounds, injections or cleaning.
  • polycarboxylate ether If larger amounts of polycarboxylate ether are added to the cement during or before the clinker is ground, then, after it has been mixed with water, the condenser properties known from polycarboxylate ethers are present seen.
  • this amount is 0.2 to 1.5% by weight of polycarboxylate ether with respect to the cement.
  • the fineness was determined by the air permeability method (Blaine) according to EN 196 by Blaine Automat from Wasag Chemie.
  • polycarboxylate ethers As polycarboxylate ethers, commercial polycarboxlate ethers (PCE) have been used, as described, for example, in US Pat. as products for concrete admixtures from Sika
  • the cement was ground in a closed laboratory ball mill (so-called batch mill).
  • the additives were added to the mill before starting the grinding with the usual dosage for cement additives.
  • the cement in the example given here has a composition corresponding to one
  • CEM II, CEM III, CEM IV or CEM V can be treated in analogous manner with corresponding results.
  • Milling tests were carried out without additive, only with polycarboxylate ether, only with additives and with mixtures of polycarboxylate ether and additives in a weight ratio of 1: 1 according to Table 1 and determines the fineness of the cements obtained.
  • the total active ingredient content of all aqueous solutions tested was identical.
  • the additives were added to the mill before starting the grinding with the usual dosage for cement additives.
  • the cement in the example given here has a composition corresponding to one
  • the cement was ground in a closed laboratory ball mill (so-called batch mill).
  • the additives were added to the mill before starting the grinding with the usual dosage for cement additives.
  • the cement in the example given here has a composition corresponding to one

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne l'utilisation d'une composition aqueuse contenant au moins un éther de polycarboxylate comme adjuvant de broyage de ciment. Cette composition aqueuse contient un ou plusieurs additifs ou elle est utilisée en combinaison avec un ou plusieurs additifs. Ce ou ces additifs sont choisis parmi le 1,3‑propanediol, un acide carboxylique, un aminoalcool sulfoné, l'acide borique, un sel de l'acide borique, un sel de l'acide phosphorique, le sorbitol, un saccharide, un gluconate, le sulfate de fer, le sulfate d'étain, un sel d'antimoine, un sel de métal alcalin, un sel de métal alcalino-terreux, un lignosulfonate, le glycérol, la mélamine, le sulfonate de mélamine et des mélanges de ces substances.
EP14708058.4A 2013-03-13 2014-03-06 Utilisation d'éthers de polycarboxylates en combinaison avec d'autres additifs pour le broyage de ciment Withdrawn EP2970029A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14708058.4A EP2970029A1 (fr) 2013-03-13 2014-03-06 Utilisation d'éthers de polycarboxylates en combinaison avec d'autres additifs pour le broyage de ciment

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13159010 2013-03-13
PCT/EP2014/054354 WO2014139857A1 (fr) 2013-03-13 2014-03-06 Utilisation d'éthers de polycarboxylates en combinaison avec d'autres additifs pour le broyage de ciment
EP14708058.4A EP2970029A1 (fr) 2013-03-13 2014-03-06 Utilisation d'éthers de polycarboxylates en combinaison avec d'autres additifs pour le broyage de ciment

Publications (1)

Publication Number Publication Date
EP2970029A1 true EP2970029A1 (fr) 2016-01-20

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CN110804167B (zh) * 2019-11-25 2022-06-10 江苏金木土科技有限公司 一种水泥助磨剂的制备方法
CN110790527B (zh) * 2019-11-25 2021-12-31 江苏金木土新材料有限公司 一种矿渣用助磨剂的制备方法
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CA2904811A1 (fr) 2014-09-18
WO2014139857A1 (fr) 2014-09-18
US20160024307A1 (en) 2016-01-28
JP2016516652A (ja) 2016-06-09
CN105189410A (zh) 2015-12-23
RU2690592C2 (ru) 2019-06-04
BR112015022562A2 (pt) 2017-07-18
RU2015130749A (ru) 2017-04-19
MX2015012221A (es) 2016-04-15

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