WO2004052806A1 - Physiologically-effective industrial protective means - Google Patents

Physiologically-effective industrial protective means Download PDF

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Publication number
WO2004052806A1
WO2004052806A1 PCT/EP2003/012658 EP0312658W WO2004052806A1 WO 2004052806 A1 WO2004052806 A1 WO 2004052806A1 EP 0312658 W EP0312658 W EP 0312658W WO 2004052806 A1 WO2004052806 A1 WO 2004052806A1
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Prior art keywords
fine
cement
reducing agent
agent
esp
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PCT/EP2003/012658
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German (de)
French (fr)
Inventor
Gabriela Alter
Volkhart Rudert
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Dyckerhoff Ag
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Publication date
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Priority to AU2003293680A priority Critical patent/AU2003293680A1/en
Publication of WO2004052806A1 publication Critical patent/WO2004052806A1/en

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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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1075—Chromium-free or very low chromium-content materials
    • C04B2111/1081—Chromium VI, e.g. for avoiding chromium eczema
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention relates to a physiologically effective occupational safety agent for hydraulic binders containing chromium (VI) ions, such as cement.
  • VI chromium
  • Chromium (VI) reducing agents such as iron (II) or tin (II) or manganese (II) salts are effective for these redox equilibria
  • water-soluble tin (II) salts such as tin (II) -Chloride or tin (II) sulfate, are very effective.
  • the tin (II) salt can be added to the cement in liquid form or in powder form during manufacture, or before or during mixing with water, or an additive or an additive (EP 0 960 865 AI).
  • tin (II) salts also have considerable side effects, for example on the setting and hardening behavior of cement mixtures that are known to be used with certain other additives.
  • the effect of these additives, which are usually used, is impaired when a tin (II) salt is present.
  • tin (II) sulfate acts as a retarder (DE-OS 26 53 443) and concrete plasticizer (DE 198 33 602 C2); it is even used as a grinding aid (DE 198 33 603).
  • the effects of the reducing agent can be reduced or even lost to the extent of the side effects.
  • Iron (II) and manganese (II) or the like reducing agents also have the same side effects.
  • the object of the invention is to eliminate or at least suppress the side effects of the reducing agents which reduce the chro (VI) ions in cements in such a way that the action of the additives normally used is not disturbed and the action of the reducing agents is fully retained.
  • a physiologically effective occupational safety agent in the form of an admixable additive (compound) which contains a reducing agent and a hydraulic fine binder and / or a latent-hydraulic fine sand sand which reacts with the usual additives.
  • This preferably dry powdery additive is added to a cement of normal fineness (normal cement) containing chro (VI) compounds, preferably after grinding, or e.g. supplied as an accessory or e.g. added to a cement mixture when mixing with water or afterwards.
  • Normal cements for the purposes of the present invention generally have a fineness of up to 6,000 cm 2 / g measured according to Blaine.
  • a tin (II) salt is preferred.
  • the hydraulic ultrafine binder and / or the slag sand fine flour on entering water compensate for the side effects of the reducing agent, in particular the tin (II) salt, by probably preliminary, so far not disruptive secondary reactions between the very finely divided and thus very reactive reaction partners of the ultrafine binder , which is preferably a Portland finest paste and / or the slag sand flour and in particular the tin (II) salt, so that the tin (II) salt is blocked or buffered with regard to the side effects in normal cement.
  • the fineness of the ultra-fine binder and the fine sand powder from the slag should expediently be above 8,000 cm 2 / g, in particular between 10,000 c Vg and 18,000 cm 2 / g.
  • the additive according to the invention is preferably added in amounts of 0.1 to 1.0% by mass, in particular 0.2 to 0.5% by mass, based on the normal cement.
  • the additive according to the invention can expediently also in small amounts a sulfate carrier, e.g. in the form of a gypsum phase such as dihydrate, hemihydrate or anhydrite, which increases the effectiveness of suppressing the side effects.
  • a sulfate carrier e.g. in the form of a gypsum phase such as dihydrate, hemihydrate or anhydrite, which increases the effectiveness of suppressing the side effects.
  • compositions of the additive according to the invention are preferred:
  • compositions are particularly effective:
  • compositions are also preferred:
  • clinker fine flour that is an easily ground and sifted sulfate carrier-free clinker fine flour, in particular a Portland cement clinker fine flour, is used.
  • the tin (II) salt can be tin (II) sulfate and / or tin (II) chloride. Tin (II) sulfate is preferred.
  • Another embodiment of the invention provides a clinker or ultrafine binder with an increased C 3 A content of, for example, about 9, in particular over 12% by weight C 3 A, to use because C 3 A very fast running early reactions in the manner of a so-called Guaranteed spoonbinders.
  • the C 3A component is in the rhombic K-containing modification.
  • the negative chromate effects in cements can be specifically compensated in a controlled manner and it is ensured that the chromate (VI) ion content of a cement is actually always below, even far below the prescribed value can be pressed.
  • the occupational safety agent according to the invention has so much of the reactive fine component that the reducing agent, despite the homogeneous distribution of the occupational safety agent in the normal cement, always finds sufficient amounts of the superfine component to compensate for the side effects.
  • the amount of the ultra-fine component is not based on the reaction component of the reducing agent, but rather on an amount that ensures that the ultra-fine component is available to the reducing agent for compensation, in particular of the retarding effect in the cement mixture. It is particularly advantageous that, according to the invention, a very fine component is used which is of the same type as normal cement.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to a physiologically-effective industrial protective means for preventing the harmful effects of tetravalent chromium compounds in cements, comprising an adjunct with a reducing agent for chromium compounds and a further component acting on the reducing agent. Said component is a mineral fine component with the effect of at least reducing the harmful effect of the reducing agent on the cement and is present in the form of a fine hydraulic binder and/or a latent hydraulic fine slag milling.

Description

Physiologisch wirksames Arbeitsschutzmittel Physiologically effective occupational safety equipment
Die Erfindung betrifft ein • physiologisch wirksames Arbeitsschutzmittel für Chrom (VI) -Ionen enthaltende hydraulische Bindemittel wie Zement.The invention relates to a physiologically effective occupational safety agent for hydraulic binders containing chromium (VI) ions, such as cement.
Es ist allgemeines Grundlagenwissen der Chemie, Allergien verursachende, wasserlösliche Vl-wertige Chromverbindungen in wässrigen Zementmischungen durch Elektronenzufuhr über Redox- Gleichgewichte unschädlich zu machen. Für diese Redox- Gleichgewichte sind Chrom (VI) -reduzierende Mittel wie Ei- sen(II)- oder Zinn (II)- oder Mangan (II) -Salze effektiv, wobei wasserlösliche Zinn (II) -Salze, wie Zinn (II) -Chlorid oder Zinn(II) -Sulfat, sehr effektiv sind.It is general basic knowledge of chemistry to make allergy-causing, water-soluble Vl-containing chromium compounds in aqueous cement mixtures harmless by electron supply via redox equilibria. Chromium (VI) reducing agents such as iron (II) or tin (II) or manganese (II) salts are effective for these redox equilibria, water-soluble tin (II) salts such as tin (II) -Chloride or tin (II) sulfate, are very effective.
Das Zinn (II) -Salz kann in flüssiger Form oder in Pulverform dem Zement bei der Herstellung, oder vor dem oder beim Anmachen mit Wasser, oder einem Zusatzstoff oder einem Zusatzmittel zugesetzt werden (EP 0 960 865 AI) .The tin (II) salt can be added to the cement in liquid form or in powder form during manufacture, or before or during mixing with water, or an additive or an additive (EP 0 960 865 AI).
Bekannt ist auch, das Zinn (II) -Salz mit Ligninsulfonsäure zu kombinieren, um die Dispergierbarkeit des Zinn (II) -Salzes beim Mischen mit Zement zu verbessern (EP 0 960 865 AI) . Des Weiteren ist bekannt, das Zinn (II) -Salz mit inerten Zumischproduk- ten zu konditionieren, um die Hygroskopizität .zu kompensieren und damit die Lagerstabilität und genaue Dosierbarkeit zu verbessern (DE 299 15 333 Ul) .It is also known to combine the tin (II) salt with lignin sulfonic acid in order to improve the dispersibility of the tin (II) salt when mixing with cement (EP 0 960 865 AI). Furthermore, it is known to condition the tin (II) salt with inert admixtures in order to compensate for the hygroscopicity and thus to improve the storage stability and precise meterability (DE 299 15 333 Ul).
Die Zinn (II) -Salze haben aber auch erhebliche Nebenwirkungen, z.B. auf das Erstarrungs- und Erhärtungsverhalten von Zement- mischungen, die bekanntlich mit bestimmten anderen Zusatzmitteln eingestellt werden. Die Wirkung dieser üblicherweise verwendeten Zusatzmittel ist gestört, wenn ein Zinn (II) -Salz vorliegt. Beispielsweise wirkt Zinn (II) -Sulfat als Verzögerer (DE-OS 26 53 443) und Betonverflüssiger (DE 198 33 602 C2 ) ; es wird sogar als Mahlhilfsmittel (DE 198 33 603) eingesetzt. Im Umfang der Nebenwirkungen können die Wirkungen des Reduktionsmittels gemindert oder sogar verloren gehen. Dergleichen Nebenwirkungen weisen auch Eisen (II)- und Mangan (II)- oder dergleichen Reduktionsmittel auf .However, the tin (II) salts also have considerable side effects, for example on the setting and hardening behavior of cement mixtures that are known to be used with certain other additives. The effect of these additives, which are usually used, is impaired when a tin (II) salt is present. For example, tin (II) sulfate acts as a retarder (DE-OS 26 53 443) and concrete plasticizer (DE 198 33 602 C2); it is even used as a grinding aid (DE 198 33 603). The effects of the reducing agent can be reduced or even lost to the extent of the side effects. Iron (II) and manganese (II) or the like reducing agents also have the same side effects.
Aufgabe der Erfindung ist, die Nebenwirkungen der die Chro (VI) -Ionen in Zementen reduzierenden Reduktionsmittel derart auszuschalten bzw. zumindest so zu unterdrücken, dass die Wirkung der üblicherweise verwendeten Zusatzmittel nicht gestört wird und die Wirkung der Reduktionsmittel voll erhalten bleibt .The object of the invention is to eliminate or at least suppress the side effects of the reducing agents which reduce the chro (VI) ions in cements in such a way that the action of the additives normally used is not disturbed and the action of the reducing agents is fully retained.
Diese Aufgabe wird durch ein physiologisch wirksames Arbeitsschutzmittel in Form eines zumischbaren Zusatzmittels (Com- pound) gelöst, das ein Reduktionsmittel und ein hydraulisches Feinstbindemittel und/oder ein mit den üblichen Zusatzmitteln reagierendes latenthydraulisches Huttensandfeinst ehl enthält. Dieses vorzugsweise trockene pulverförmige Zusatzmittel wird einem Chro (VI) -Verbindungen enthaltenden Zement normaler Feinheit (Normalzement) vorzugsweise nach der Mahlung zugesetzt, oder z.B. als Beipackmittel mitgeliefert oder z.B. einer Zementmischung beim Anmachen mit Wasser oder danach zugegeben.This object is achieved by a physiologically effective occupational safety agent in the form of an admixable additive (compound) which contains a reducing agent and a hydraulic fine binder and / or a latent-hydraulic fine sand sand which reacts with the usual additives. This preferably dry powdery additive is added to a cement of normal fineness (normal cement) containing chro (VI) compounds, preferably after grinding, or e.g. supplied as an accessory or e.g. added to a cement mixture when mixing with water or afterwards.
Normalzemente im Sinne der vorliegenden Erfindung weisen i.d.R. eine Feinheit bis 6.000 cm2/g gemessen nach Blaine auf.Normal cements for the purposes of the present invention generally have a fineness of up to 6,000 cm 2 / g measured according to Blaine.
Bevorzugt wird ein Zinn (II) -Salz . In überraschender Weise kompensieren das hydraulische Feinstbindemittel und/oder das Hüttensandfeinstmehl bei Zutritt von Wasser, die Nebenwirkungen des Reduktionsmittels, insbesondere des Zinn (II) -Salzes, durch wahrscheinlich vorläufige, insoweit nicht störende Νebenreaktionen zwischen den sehr feinteiligen und damit sehr reaktiven Reaktionspartnern des Feinstbindemittels, das vorzugsweise ein Portlandfeinstze- irient ist und/oder des Hüttensandfeinstmehls und dem insbesondere Zinn (II) -Salz, so dass das Zinn (II) -Salz bezüglich der Nebenwirkungen im Normalzement abgeblockt bzw. abgepuffert ist.A tin (II) salt is preferred. Surprisingly, the hydraulic ultrafine binder and / or the slag sand fine flour on entering water compensate for the side effects of the reducing agent, in particular the tin (II) salt, by probably preliminary, so far not disruptive secondary reactions between the very finely divided and thus very reactive reaction partners of the ultrafine binder , which is preferably a Portland finest paste and / or the slag sand flour and in particular the tin (II) salt, so that the tin (II) salt is blocked or buffered with regard to the side effects in normal cement.
Die Feinheit des Feinstbindemittels und des Hüttensandfeinstmehls sollte zweckmäßigerweise über 8.000 cm2/g, insbesondere zwischen 10.000 c Vg und 18.000 cm2/g, liegen.The fineness of the ultra-fine binder and the fine sand powder from the slag should expediently be above 8,000 cm 2 / g, in particular between 10,000 c Vg and 18,000 cm 2 / g.
Vorzugsweise wird das erfindungsgemäße Zusatzmittel in Mengen von 0,1 bis 1,0 Masse-%, insbesondere von 0,2 bis 0,5 Masse-%, bezogen auf den Normalzement, zugesetzt.The additive according to the invention is preferably added in amounts of 0.1 to 1.0% by mass, in particular 0.2 to 0.5% by mass, based on the normal cement.
Das erfindungsgemäße Zusatzmittel kann zweckmäßigerweise in geringen Mengen auch einen Sulfatträger, z.B. in Form einer Gipsphase wie Dihydrat, Halbhydrat oder Anhydrit enthalten, wodurch die Effektivität der Unterdrückung der Nebenwirkungen verstärkt wird.The additive according to the invention can expediently also in small amounts a sulfate carrier, e.g. in the form of a gypsum phase such as dihydrate, hemihydrate or anhydrite, which increases the effectiveness of suppressing the side effects.
Bevorzugt werden folgende Zusammensetzungen des erfindungsgemäßen Zusatzmittels:The following compositions of the additive according to the invention are preferred:
8 - 12, insb. 9 - 11 M% Reduktionsmittel , insb. Sn (II) -Salz,8 - 12, esp. 9 - 11 M% reducing agent, esp. Sn (II) salt,
88 - 92, insb. 89 - 91 M% Feinstanteil, vorzugsw. Portlandfeinstzement . Des Weiteren sind die folgenden Zusammensetzungen- besonders effektiv:88 - 92, esp. 89 - 91 M% fine fraction, preferably Portland fine cement. Furthermore, the following compositions are particularly effective:
7 - 12, insb. 8 - 11 M% Reduktionsmi ttel , insb. Sn (II) -Salz,7 - 12, esp. 8 - 11 M% reducing agent, esp. Sn (II) salt,
85 - 87, insb . 85 - 87 M% Feinstzement, insb. Portlandfeinstzement,85 - 87, esp. 85 - 87 M% fine cement, especially Portland fine cement,
3 - 6, insb. 4 - 5 M% Gipsphase .3 - 6, especially 4 - 5 M% gypsum phase.
Bevorzugt werden auch die folgenden Zusammensetzungen:The following compositions are also preferred:
7 - 12 M% Reduktionsmi ttel , insb. Sn (II) -Salz,7 - 12 M% reducing agent, especially Sn (II) salt,
10 - 12 M% Portlandfeinstzement,10 - 12 M% Portland fine cement,
75 - 77 M% Hüttensandfeinstmehl ,75 - 77 M% fine grain sand,
3 - 4 M% Gipsphase .3 - 4 M% gypsum phase.
Nach einer besonderen Ausführungsform der Erfindung wird anstelle des hydraulischen Feinstbindemittels oder in Kombination damit Klinkerfeinstmehl, das ist ein ohne weiteres gemahlenes und gesichtetes sulfatträgerfreies Klinkerfeinstmehl, insbesondere ein Portlandzementklinkerfeinstmehl, verwendet.According to a particular embodiment of the invention, instead of the hydraulic fine binder or in combination therewith, clinker fine flour, that is an easily ground and sifted sulfate carrier-free clinker fine flour, in particular a Portland cement clinker fine flour, is used.
Das Zinn (II) -Salz kann Zinn (II) -Sulfat und/oder Zinn (II)- Chlorid sein. Bevorzugt wird Zinn (II) -Sulfat .The tin (II) salt can be tin (II) sulfate and / or tin (II) chloride. Tin (II) sulfate is preferred.
Eine weitere Ausführungsform der Erfindung sieht vor, ein Klinkerfeinstmehl oder Feinstbindemittel mit einem erhöhten C3A-Gehalt von z.B. über 9, insbesondere über 12 Masse-% C3A, zu verwenden, weil C3A sehr schnell ablaufende Anfangsreaktionen nach Art eines sog. Löffelbinders gewährleistet.Another embodiment of the invention provides a clinker or ultrafine binder with an increased C 3 A content of, for example, about 9, in particular over 12% by weight C 3 A, to use because C 3 A very fast running early reactions in the manner of a so-called Guaranteed spoonbinders.
Besonders vorteilhaft ist, wenn die C3A-Komponente in der rhombischen K-haltigen Modifikation vorliegt.It is particularly advantageous if the C 3A component is in the rhombic K-containing modification.
Mit dem erfindungsgemäßen Arbeitsschutzmittel gelingt es, die negativen Chromatwirkungen in Zementen kontrolliert gezielt zu kompensieren und zu gewährleisten, dass der Chromat (VI) -Ionen- Gehalt eines Zements tatsächlich immer unter, sogar weit unter den vorgeschriebenen Wert gedrückt werden kann. Das erfindungsgemäße Arbeitsschutzmittel weist in jedem Fall soviel von der reaktiven Feinstkomponente auf, dass das Reduktionsmittel, trotz homogener Verteilung des Arbeitsschutzmittels im Normalzement, immer ausreichende Mengen der Feinstkomponente zur Kompensation der Nebenwirkungen vorfindet. Insofern ist die Menge der Feinstkomponente nicht abgestellt auf die Reaktionskomponente des Reduktionsmittels, sondern auf eine Menge, die sicherstellt, dass dem Reduktionsmittel die Feinstkomponente zur Kompensation .insbesondere der verzögernden Wirkung in der Zementmischung zur Verfügung steht. Besonders vorteilhaft ist, dass nach der Erfindung eine Feinstkomponente verwendet wird, die artgleich zum Normalzement ist. With the occupational safety agent according to the invention, the negative chromate effects in cements can be specifically compensated in a controlled manner and it is ensured that the chromate (VI) ion content of a cement is actually always below, even far below the prescribed value can be pressed. In any case, the occupational safety agent according to the invention has so much of the reactive fine component that the reducing agent, despite the homogeneous distribution of the occupational safety agent in the normal cement, always finds sufficient amounts of the superfine component to compensate for the side effects. In this respect, the amount of the ultra-fine component is not based on the reaction component of the reducing agent, but rather on an amount that ensures that the ultra-fine component is available to the reducing agent for compensation, in particular of the retarding effect in the cement mixture. It is particularly advantageous that, according to the invention, a very fine component is used which is of the same type as normal cement.

Claims

Patentansprüche claims
1. Physiologisch wirkendes Arbeitsschutzmittel zur Verhinderung der schädlichen Wirkung der Vl-wertigen Chromverbindungen in Zementen, bestehend aus einem Zusatzmittel, das ein Reduktionsmittel für die Chromverbindungen und eine weitere, auf das Reduktionsmittel wirkende Komponente enthält, wobei die Komponente eine schädliche Nebenwirkung des Reduktionsmittels auf den ' Zement zumindest mindernde mineralische Feinstkomponente- ist. und in Form eines hydraulischen Feinstbindemittels und/oder eines latenthydraulischen Hüttensandfeinstmehls vorliegt.1. Physiologically active occupational safety agent for preventing the harmful effect of the Vl-valent chromium compounds in cements, consisting of an additive which contains a reducing agent for the chromium compounds and a further component acting on the reducing agent, the component having a harmful side effect of the reducing agent on the 'Cement is at least reducing mineral fine component. and is in the form of a hydraulic fine binder and / or a latent hydraulic fine sand powder.
2. Mittel nach Anspruch 1, d a du r c h g e k e n z e i c h n e t , d a s s das Reduktionsmittel ein Zinn(II) -Salz ist.2. Means according to claim 1, that the reducing agent is a tin (II) salt.
3. Mittel nach Anspruch 2 , d a du r c h g e k e n n z e i c h n e t , d a s s das Reduktionsmittel Zinn (II) -Sulfat ist.3. Means according to claim 2, since the reducing agent is tin (II) sulfate.
4. Mittel nach Anspruch 2 , d a du r c h g e k e n n z e i c h n e t , d a s s das Reduktionsmittel Zinn (II) -Sulfat und/oder Zinn(II)- Chlorid ist.4. Means according to claim 2, that the reducing agent is tin (II) sulfate and / or tin (II) chloride.
5. Mittel nach einem oder mehreren der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , d a s s es eine Gipsphase zugesetzt enthält. 5. Composition according to one or more of claims 1 to 4, characterized in that it contains a gypsum phase added.
6. Mittel nach einem oder mehreren der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , d a s s die Feinstkomponente mit einer Feinheit über 8.000 cm2/g (nach Blaine) , insbesondere mit einer Feinheit zwischen 10.000 und 18.000 cm2/g, vorliegt.6. Composition according to one or more of claims 1 to 5, characterized in that the very fine component with a fineness of over 8,000 cm 2 / g (according to Blaine), in particular with a fineness between 10,000 and 18,000 cm 2 / g, is present.
7. Mittel nach einem oder mehreren der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , d a s s die Feinstkomponente ein Portlandfeinstzement ist .7. Composition according to one or more of claims 1 to 6, d a d u r c h g e k e n n z e i c h n e t, that the fine component is a Portland fine cement.
8. Mittel nach einem oder mehreren der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , d a s s es trocken und pulverförmig ist.8. Composition according to one or more of claims 1 to 7, d a d u r c h g e k e n n z e i c h n e t, that it is dry and powdery.
9. Mittel nach einem oder mehreren der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , d a s s es pelletiert ist.9. Means according to one or more of claims 1 to 7, d a d u r c h g e k e n n z e i c h n e t, which is pelleted.
10. Mittel nach einem oder mehreren der Ansprüche 1 bis 9, d a d u r c h g e k e n n z e i c h n e t , d a s s es wie folgt zusammengesetzt: ist:10. Composition according to one or more of claims 1 to 9, d a d u r c h g e k e n n z e i c h n e t, which is composed as follows:
8 - 12, insb. 9 - 11 M% Reduktionsmittel, ins . Sn(II) -Sal z ,8 - 12, esp. 9 - 11 M% reducing agent, ins. Sn (II) salt z,
88 - 92, insb. 89 - 91 M% Feinstanteil, vorzugsw. Portlandfeinstzement .88 - 92, esp. 89 - 91 M% fine fraction, preferably Portland fine cement.
11. Mittel nach einem oder mehreren der Ansprüche 1 bis 9, d a d u r c h g e k e n n z e i c h n e t , d a s s es wie folgt zusammengesetzt ist:11. Means according to one or more of claims 1 to 9, d a d u r c h g e k e n n z e i c h n e t, which is composed as follows:
7 - 12, insb. 8 - 11 M% Reduktionsmittel, insb. Sn (II) -Salz,7 - 12, esp. 8 - 11 M% reducing agent, esp. Sn (II) salt,
85 - 87, insb. 85 - 87 M% Feinstzement, insb. Portlandfeinstzement,85 - 87, esp. 85 - 87 M% fine cement, esp. Portland fine cement,
3 - 6, insb. 4 - 5 M% Gipsphase. 3 - 6, especially 4 - 5 M% gypsum phase.
12. Mittel nach einem oder mehreren der Ansprüche 1 bis 9 , d a d u r c h g e k e n n z e i c h n e t , d a s s es wie folgt zusammengesetzt ist:12. Composition according to one or more of claims 1 to 9, d a d u r c h g e k e n n z e i c h n e t, which is composed as follows:
7 - 12 M% Reduktionsmittel, insb. Sn (II) -Salz,7 - 12 M% reducing agent, especially Sn (II) salt,
10 - 12 M% Portlandfeinstzement,10 - 12 M% Portland fine cement,
75 - 77 M% Hüttensandf einstmehl,75 - 77 M% slag sand flour,
3 - 4 M% Gipsphase.3 - 4 M% gypsum phase.
13. Mittel nach einem oder mehreren der Ansprüche 1 bis 12 , d a d u r c h g e k e n n z e i c h n e t , d a s s anstelle des hydraulischen Feinstbindemittels oder in Kombination damit ein sulfatträgerfreies Klinkerfeinstmehl, insbesondere ein Portlandzementklinkerfeinstmehl, und ein Verzögerer vorliegt.13. Composition according to one or more of claims 1 to 12, d a d u r c h g e k e n n z e i c h n e t, d a s s instead of the hydraulic fine binder or in combination therewith a clinker fine flour free of sulfate carrier, in particular a Portland cement clinker fine flour, and a retarder is present.
14. Mittel nach einem oder mehreren der Ansprüche 1 bis 13, d a d u r c h g e k e n n z e i c h n e t , d a s s das hydraulische Feinstbindemittel einen erhöhten C3A- Gehalt von über 9 Masse-% bezogen auf das Feinstbindemittel aufweist.14. Composition according to one or more of claims 1 to 13, characterized in that the hydraulic fine binder has an increased C 3 A content of over 9% by mass based on the fine binder.
15. Mittel nach Anspruch 14, d a du r c h g e k e n n z e i c h n e t , d a s s15. Means according to claim 14, that means that it is
C3A in Form der rhombischen K-haltigen Modifikation vorliegt.C 3 A is in the form of the rhombic K-containing modification.
16. Verwendung eines Mittels nach einem oder mehreren der Ansprüche 1 bis 15, d a du r c h g e k e n n z e i c h n e t , d a s s es einem Normalzement, vorzugsweise einer Feinheit bis 6.000 cmVg (nach Blaine) , insbesondere einer Feinheit bis 5.000 cmVg, zugesetzt wird. 16. Use of an agent according to one or more of claims 1 to 15, since you rchgek characterized in that it is added to a normal cement, preferably a fineness up to 6,000 cmVg (according to Blaine), in particular a fineness up to 5,000 cmVg.
17. Verwendung eines Mittels nach einem oder mehreren der An- ■ Sprüche 1 bis 15, d a d u r c h g e k e n n z e i c h n e t , d a s s es dem Anmachwasser für Normalzement enthaltende 'Frischmörtel oder Frischbetone oder Zementsuspensionen zugesetzt wird.17. Use of an agent according to one or more of the arrival ■ sayings 1 to 15, characterized in that it is added to the mixing water for common cements containing 'fresh mortar or fresh concrete or cement suspensions.
18. Verwendung eines Mittels nach einem oder mehreren der Ansprüche 1 bis 15, d d u r c h g e k e n n z e i c h n e t , d a s s es einer trockenen, Normalzement enthaltenden Mörtel- oder Beton- oder Suspensionsmischung vor der Wasserzugabe zugesetzt wird.18. Use of an agent according to one or more of claims 1 to 15, d d u r c h g e k e n n z e i c h n e t, d a s s it is added to a dry mortar or concrete or suspension mixture containing normal cement before the addition of water.
19. Verwendung eines Mittels nach einem oder mehreren der Ansprüche 1 bis 15, d a d u r c h g e k e n n z e i c h n e t , d a s s es einer Normalzement enthaltenden Mörtel- oder Beton- o- der Suspensionsmischung nach der Wasserzugabe zugesetzt wird.19. Use of an agent according to one or more of claims 1 to 15, d a d u r c h g e k e n n z e i c h n e t, s as it is added to a mortar or concrete or suspension mixture containing normal cement after the addition of water.
20. Verwendung nach einem oder mehreren der Ansprüche 16 bis 19, d d r c h g e k e n n z e i c h n e t , d a s s das Mittel in Mengen von 0,1 bis 1 Masse-%, insbesondere von 0,3 bis 0,8 Masse-%, bezogen auf den Normalzement, zugesetzt wird.20. Use according to one or more of claims 16 to 19, characterized in that the agent is added in amounts of 0.1 to 1% by mass, in particular 0.3 to 0.8% by mass, based on the normal cement ,
21. Verwendung nach einem oder mehreren der Ansprüche 16 bis 20, d a d u r c h g e k e n n z e i c h n e t , d a s s das Mittel auf eine bestimmte Normalzementmenge abgepackt als Beipackung verwendet wird. 21. Use according to one or more of claims 16 to 20, d a d u r c h g e k e n n z e i c h n e t, that the agent is packaged to a certain amount of normal cement used as an accessory.
PCT/EP2003/012658 2002-12-11 2003-11-12 Physiologically-effective industrial protective means WO2004052806A1 (en)

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DE2002157879 DE10257879B3 (en) 2002-12-11 2002-12-11 Additive for normal cement or mortar, concrete or suspension containing cement contains reducing agent for hexavalent chromium compounds and very fine powder of hydraulic binder and/or latent hydraulic foundry sand

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WO2005076858A2 (en) * 2004-02-04 2005-08-25 W.R. Grace & Co.-Conn. Liquid additive for intergrinding cement
US7232483B2 (en) 2005-02-01 2007-06-19 W. R. Grace & Co.-Conn. Cement composition having chromium reducer
DE102005044941A1 (en) * 2005-09-20 2007-03-22 Eric Blauenstein Process and agent for reductive chromate detoxification of cement preparations
DE102006035969B4 (en) * 2006-08-02 2009-08-13 Tib Chemicals Ag Preparation of powdered tin (II) sulfate
AT504328B8 (en) * 2007-05-22 2008-09-15 Kdm Engineering Gmbh USE OF AN ADDITIVE TO A BUILDING MATERIAL AND METHOD FOR PRODUCING A BUILDING MATERIAL
EP2363386A1 (en) * 2010-02-23 2011-09-07 Mig Material Innovative Gesellschaft MBH Reduction of CR(VI) ions in cement or products containing cement
FR2993554B1 (en) * 2012-07-19 2014-11-21 Saint Gobain Weber BINDER BASED ON HIGH FURNACE DAIRY

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WO1999037593A1 (en) * 1998-01-27 1999-07-29 Chemische Werke Zell-Wildshausen Gmbh Medium for reducing chromium (vi) ions in a water-curing mass
DE29915333U1 (en) * 1999-09-01 2000-04-27 Abc Angersdorfer Bauchemie Gmb Conditioner for tin compounds in hydraulically setting masses

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WO1999037593A1 (en) * 1998-01-27 1999-07-29 Chemische Werke Zell-Wildshausen Gmbh Medium for reducing chromium (vi) ions in a water-curing mass
DE29915333U1 (en) * 1999-09-01 2000-04-27 Abc Angersdorfer Bauchemie Gmb Conditioner for tin compounds in hydraulically setting masses

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