WO1997019032A1 - Multipurpose admixture for hydraulic cement composition - Google Patents

Multipurpose admixture for hydraulic cement composition Download PDF

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Publication number
WO1997019032A1
WO1997019032A1 PCT/US1996/018300 US9618300W WO9719032A1 WO 1997019032 A1 WO1997019032 A1 WO 1997019032A1 US 9618300 W US9618300 W US 9618300W WO 9719032 A1 WO9719032 A1 WO 9719032A1
Authority
WO
WIPO (PCT)
Prior art keywords
admixture
acid
calcium
cement composition
fatty acid
Prior art date
Application number
PCT/US1996/018300
Other languages
French (fr)
Inventor
Ara A. Jeknavorian
Ding Feng Shen
Original Assignee
W. R. Grace & Co.-Conn.
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 W. R. Grace & Co.-Conn. filed Critical W. R. Grace & Co.-Conn.
Priority to JP51980097A priority Critical patent/JP4251505B2/en
Priority to KR1019980703599A priority patent/KR100579778B1/en
Priority to AU77336/96A priority patent/AU7733696A/en
Publication of WO1997019032A1 publication Critical patent/WO1997019032A1/en

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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/08—Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
    • 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
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • 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
    • C04B24/16—Sulfur-containing compounds
    • 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
    • C04B24/16—Sulfur-containing compounds
    • C04B24/18—Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye

Definitions

  • the present invention relates to admixtures for hydraulic cement compositions, and more particularly to a multifunctional admixture that combines set acceleration and air entrainment properties.
  • hydraulic cement refers to a cement which hardens by a chemical interaction or reaction with water. It is publicly known that certain properties of hydraulic cements can be modified by the addition of any number of chemical additives. For example, it is known to add calcium nitrate as a set accelerator. However, calcium nitrate may beTncompatable when combined in the hydratable cement mixture with other kinds of additives, chemicals, and agents. In the present invention, the inventors have discovered a novel combination of chemical additives for simultaneously achieving a number of properties in a hydraulic cement composition.
  • the present invention relates to a multifunctional hydraulic cement composition admixture which comprises a set accelerator which is an alkali or alkaline earth metal salt which is a salt of an organic or inorganic acid, and a fatty acid aminosulfonic acid surfactant.
  • the set accelerator is a calcium salt, such as calcium nitrate, calcium chloride, calcium formate, or calcium nitrite, and a fatty acid aminosulfonic acid having the general formula
  • M is an alkali or alkaline earth metal, ammonium, or alkyl ammonium ion
  • the set accelerator comprises calcium nitrate
  • Another preferred multi-functional hydraulic cement admixture of the invention further comprises, in addition to the set accelerator and surfactant, a water reducing agent, an early strength enhancing agent, and preferably both.
  • the water reducing agent may comprise a lignosulfonate, such as calcium lignosulfonate.
  • the early strength enhancing agent may comprise an alkanolamine, preferably a triethanolamine.
  • preferred multi-functional hydraulic cement composition admixtures of the invention can comprise a set accelerator, a water reducing agent, an early strength enhancing agent, and a fatty acid aminosulfonic acid surfactant which is believed to be operative to act as an air entraining agent. While some of these functions may have been combined simultaneously within one admixture formulation, it is believed that the combination of certain of these functional components, such as the set accelerator with the surfactant agents, not to mention all four of the functional components just described, has not been disclose or suggested by the prior art.
  • the present invention further relates to hydraulic cement mixes, including concrete mixes, comprising multi-functional admixtures described above and hereinafter.
  • cement composition refers to pastes, mortars and concrete compositions comprising a hydraulic cement binder.
  • Pastes are mixtures composed of a hydraulic cement binder, for example, Portland cement, either alone or in combination with other components such as fly ash, silica fume or blast furnace slag, and water; mortars are pastes additionally including fine aggregate, and concretes are mortars additionally including coarse aggregate.
  • the cement compositions of this invention are formed by mixing certain amounts of required materials, e.g., a hydraulic cement, water, and fine or coarse aggregate, as may be applicable for the particular cement composition being formed.
  • concrete includes and refers to a mixture of such hydraulic cements and inert aggregates.
  • Typical aggregates include conventional "coarse” aggregates such as gravel, granite, limestone, quartz sieve, etc., as well as those materials conventionally referred to as “fine” aggregates such as sand and fly ash.
  • Conventional hydraulic cement concretes e.g., Portland cement concretes, employ major amounts of such aggregates, i.e. over 50% and usually up to about 75% by volume, in the set product.
  • the present invention pertains to a hydraulic cement composition admixture comprising a set accelerator component, preferably calcium nitrate, and a fatty acid aminosulfonic acid surfactant component, preferably sodium N-methyl oleoyl taurate.
  • a set accelerator component preferably calcium nitrate
  • a fatty acid aminosulfonic acid surfactant component preferably sodium N-methyl oleoyl taurate.
  • Other preferred admixtures additionally comprise a water reducing agent, such as an alkanolamine and more preferably a triethanolamine; an early strength enhancing component, such as a lignosulfonate and preferably a calcium lignosulfonate; and, still more preferably, the admixture additionally comprises both the triethanolamine and calcium lignosulfonate.
  • the admixture components can be blended into a stable solution using conventional mixing equipment.
  • the set-accelerating component may be any compound which, when added to a cement composition, reduces the amount of time required for the cement composition to harden.
  • an alkali or alkaline earth metal salt which is a salt of an organic or inorganic acid may be employed.
  • alkali or alkaline earth metal nitrate, nitrite, and formate examples of these compounds are alkali or alkaline earth metal nitrate, nitrite, and formate; alkali or alkaline earth metal salts of Group VII halogen and pseudohalogen acids, such as alkali or alkaline earth metal chloride, bromide, iodide, cyanide, cyanate, azide, and thiocyanate; alkali or alkaline earth metal thiosulfate and perchlorate; and.alkali or alkaline earth metal aluminates, silicates, and hydroxides, e.g., sodium hydroxide.
  • Calcium salts are particularly advantageous, especially calcium nitrate, calcium chloride, calcium formate, and calcium nitrite. Calcium nitrate is preferred.
  • the fatty acid aminosulfonic acid which is believed to operate as an air entraining agent in a hydraulic cement composition, may be an alkali or alkali earth metal salt of an N-alkyl-N-tall oil aminosulfonic acid, having the general formula
  • R is a hydrogen, alkyl group or aryl group;
  • x is 1 to 10;
  • M is an alkali or alkaline earth metal, ammonium, or alkyl ammonium ion; and "n" is 1 to 3.
  • a preferred fatty acid aminosulfonic acid surfactant comprises sodium N-methyl-N- oleoyl taurate, which is available from Rhone-Poulenc, Cranbury, New Jersey, under the tradename Igepon T-33.
  • the water reducing agent may be an alkali or alkaline earth metal salt of lignosulfonic acid, polycarboxylic acid, napthalene sulfonic acid condensate, melamine sulfonic acid condensate, hydroxylated carboxylic acids, and carbohydrates such as corn syrup.
  • the water reducing agent is a lignosulfonate, such as calcium lignosulfonate.
  • Early strength enhancing agents are known, as is the term “early strength,” by which is meant compressive strength at 1 - 3 days (see e.g., ASTM C-39).
  • Early strength enhancing agents include alkanolamines.
  • An alkanolamine is a generic term for a group of compounds in which trivalent nitrogen is attached directly to a carbon atom of an alkyl alcohol, and examples are monoethanolamine, diethanolamine, and triethanolamine.
  • Alkanolamines also include methyldiethanolamine and triisopropanolamine.
  • Preferred multi-functional admixtures of the invention are preferably used in an amount of 0.05-1.0% s/s based on cement in the concrete, where "% s/s" designates percent admixture solids on cement solids.
  • a preferred admixture may comprise calcium nitrate in the range of 90-99.5% s/s and sodium N-methyl oleoyl taurate in the range of 0.5-10.0% s/s.
  • Another preferred admixture comprises calcium nitrate (50-90% s/s); calcium lignosulfonate (5.0-40.0% s/s); triethanolamine or triisopropanolamine (0.1 -5.0% s/s); and sodium N-methyl oleoyl taurate (0.01-5.0% s/s).

Abstract

Exemplary multifunctional hydraulic cement composition admixtures of the invention comprise a set accelerator, preferably a calcium salt, and a fatty acid aminosulfonic acid surfactant. Further exemplary admixtures additionally comprise a water reducing agent, such as a lignosulfonate, and/or an early strength enhancing agent, such as an alkanolamine.

Description

MULTIPURPOSE ADMIXTURE FOR HYDRAULIC CEMENT
COMPOSITION
Field of the Invention
The present invention relates to admixtures for hydraulic cement compositions, and more particularly to a multifunctional admixture that combines set acceleration and air entrainment properties. Background of the Invention
The term "hydraulic cement" refers to a cement which hardens by a chemical interaction or reaction with water. It is publicly known that certain properties of hydraulic cements can be modified by the addition of any number of chemical additives. For example, it is known to add calcium nitrate as a set accelerator. However, calcium nitrate may beTncompatable when combined in the hydratable cement mixture with other kinds of additives, chemicals, and agents. In the present invention, the inventors have discovered a novel combination of chemical additives for simultaneously achieving a number of properties in a hydraulic cement composition.
Summary of the Invention
The present invention relates to a multifunctional hydraulic cement composition admixture which comprises a set accelerator which is an alkali or alkaline earth metal salt which is a salt of an organic or inorganic acid, and a fatty acid aminosulfonic acid surfactant. In a preferred embodiments, the set accelerator is a calcium salt, such as calcium nitrate, calcium chloride, calcium formate, or calcium nitrite, and a fatty acid aminosulfonic acid having the general formula
CH3(CH2)X— CH=CH(CH2)y— CO— NR— <CH2)Z— SO3 " Mn+ wherein "R" is a hydrogen, alkyl group or aryl group;
"x" is 1 to 10; "y" is 3 - 10; "z" is 1 to 10;
"M" is an alkali or alkaline earth metal, ammonium, or alkyl ammonium ion; and
"n" is l to 3.
In a further preferred admixture formulation, the set accelerator comprises calcium nitrate, and the surfactant comprises sodium N-methyl oleoyl taurate, which is believed to have the formula CH3(CH2)7-CH=CH(CH2)7-CO-N(CH3)CH2CH2SO3 " Na+.
Another preferred multi-functional hydraulic cement admixture of the invention further comprises, in addition to the set accelerator and surfactant, a water reducing agent, an early strength enhancing agent, and preferably both. The water reducing agent may comprise a lignosulfonate, such as calcium lignosulfonate. The early strength enhancing agent may comprise an alkanolamine, preferably a triethanolamine.
Accordingly, preferred multi-functional hydraulic cement composition admixtures of the invention can comprise a set accelerator, a water reducing agent, an early strength enhancing agent, and a fatty acid aminosulfonic acid surfactant which is believed to be operative to act as an air entraining agent. While some of these functions may have been combined simultaneously within one admixture formulation, it is believed that the combination of certain of these functional components, such as the set accelerator with the surfactant agents, not to mention all four of the functional components just described, has not been disclose or suggested by the prior art.
The present invention further relates to hydraulic cement mixes, including concrete mixes, comprising multi-functional admixtures described above and hereinafter.
Detailed Description of Exemplary Embodiments
The term "cement composition" as used herein refers to pastes, mortars and concrete compositions comprising a hydraulic cement binder. The above terms are terms of art. Pastes are mixtures composed of a hydraulic cement binder, for example, Portland cement, either alone or in combination with other components such as fly ash, silica fume or blast furnace slag, and water; mortars are pastes additionally including fine aggregate, and concretes are mortars additionally including coarse aggregate. The cement compositions of this invention are formed by mixing certain amounts of required materials, e.g., a hydraulic cement, water, and fine or coarse aggregate, as may be applicable for the particular cement composition being formed.
The term "concrete," where used herein, includes and refers to a mixture of such hydraulic cements and inert aggregates. Typical aggregates include conventional "coarse" aggregates such as gravel, granite, limestone, quartz sieve, etc., as well as those materials conventionally referred to as "fine" aggregates such as sand and fly ash. Conventional hydraulic cement concretes, e.g., Portland cement concretes, employ major amounts of such aggregates, i.e. over 50% and usually up to about 75% by volume, in the set product.
The present invention pertains to a hydraulic cement composition admixture comprising a set accelerator component, preferably calcium nitrate, and a fatty acid aminosulfonic acid surfactant component, preferably sodium N-methyl oleoyl taurate. Other preferred admixtures additionally comprise a water reducing agent, such as an alkanolamine and more preferably a triethanolamine; an early strength enhancing component, such as a lignosulfonate and preferably a calcium lignosulfonate; and, still more preferably, the admixture additionally comprises both the triethanolamine and calcium lignosulfonate. The admixture components can be blended into a stable solution using conventional mixing equipment.
The set-accelerating component may be any compound which, when added to a cement composition, reduces the amount of time required for the cement composition to harden. For example, an alkali or alkaline earth metal salt which is a salt of an organic or inorganic acid may be employed. Although the following list is not meant to be limiting, examples of these compounds are alkali or alkaline earth metal nitrate, nitrite, and formate; alkali or alkaline earth metal salts of Group VII halogen and pseudohalogen acids, such as alkali or alkaline earth metal chloride, bromide, iodide, cyanide, cyanate, azide, and thiocyanate; alkali or alkaline earth metal thiosulfate and perchlorate; and.alkali or alkaline earth metal aluminates, silicates, and hydroxides, e.g., sodium hydroxide. Calcium salts are particularly advantageous, especially calcium nitrate, calcium chloride, calcium formate, and calcium nitrite. Calcium nitrate is preferred.
The fatty acid aminosulfonic acid, which is believed to operate as an air entraining agent in a hydraulic cement composition, may be an alkali or alkali earth metal salt of an N-alkyl-N-tall oil aminosulfonic acid, having the general formula
CH3(CH2)X— CH=CH(CH2)y— CO— NR— (CH2) — SO3 " Mn+ wherein
"R" is a hydrogen, alkyl group or aryl group; "x" is 1 to 10;
"y" is 3 - 10; "z" is 1 to 10;
"M" is an alkali or alkaline earth metal, ammonium, or alkyl ammonium ion; and "n" is 1 to 3.
A preferred fatty acid aminosulfonic acid surfactant comprises sodium N-methyl-N- oleoyl taurate, which is available from Rhone-Poulenc, Cranbury, New Jersey, under the tradename Igepon T-33.
The water reducing agent may be an alkali or alkaline earth metal salt of lignosulfonic acid, polycarboxylic acid, napthalene sulfonic acid condensate, melamine sulfonic acid condensate, hydroxylated carboxylic acids, and carbohydrates such as corn syrup. Preferably, the water reducing agent is a lignosulfonate, such as calcium lignosulfonate.
Early strength enhancing agents are known, as is the term "early strength," by which is meant compressive strength at 1 - 3 days (see e.g., ASTM C-39). Early strength enhancing agents include alkanolamines. An alkanolamine is a generic term for a group of compounds in which trivalent nitrogen is attached directly to a carbon atom of an alkyl alcohol, and examples are monoethanolamine, diethanolamine, and triethanolamine. Alkanolamines also include methyldiethanolamine and triisopropanolamine.
Preferred multi-functional admixtures of the invention are preferably used in an amount of 0.05-1.0% s/s based on cement in the concrete, where "% s/s" designates percent admixture solids on cement solids. A preferred admixture may comprise calcium nitrate in the range of 90-99.5% s/s and sodium N-methyl oleoyl taurate in the range of 0.5-10.0% s/s. Another preferred admixture comprises calcium nitrate (50-90% s/s); calcium lignosulfonate (5.0-40.0% s/s); triethanolamine or triisopropanolamine (0.1 -5.0% s/s); and sodium N-methyl oleoyl taurate (0.01-5.0% s/s).

Claims

We claim:
1. A multifunctional, hydraulic cement composition admixture comprising: a set accelerator which is an alkali or alkaline earth metal salt which is a salt of an organic or inorganic acid, and a fatty acid aminosulfonic acid surfactant.
2. The admixture of claim 1 wherein the set accelerator comprises calcium nitrate, calcium chloride, calcium formate, or calcium nitrite; and the fatty acid aminosulfonic acid has the general formula
CH3(CH2)X— CH=CH(CH2)y— CO— NR— (CH2)Z— SO3 ^ Mn+ wherein
"R" is a hydrogen, alkyl group or aryl group; "x" is 1 to 10;
"y" is 3 - 10; "z" is 1 to 10;
"M" is an alkali or alkaline earth metal, ammonium, or alkyl ammonium ion; and "n" is l to 3.
3. The admixture of claim 2 wherein said fatty acid amino sulfonic acid comprises sodium N-methyl oleoyl taurate.
4. The admixture of claim 2 further comprising a water reducing agent comprising an alkali or alkaline earth metal salt of lignosulfonic acid, polycarboxylic acid, napthalene sulfonic acid condensate, melamine sulfonic acid condensate, hydroxylated carboxylic acids, or a carbohydrate.
5. The admixture of claim 4 wherein said water reducing agent comprises calcium lignosulfonate.
6. The admixture of claim 2 further comprising an early strength enhancing agent.
7. The admixture of claim 6 wherein said early strength enhancing agent comprises an alkanolamine.
8. The admixture of claim 7 wherein said alkanolamine comprises triethanolamine or triisopropanolamine.
9. The admixture of claim 1 wherein said set accelerator comprises calcium nitrate, said fatty acid aminosulfonic acid surfactant comprises sodium N- methyl oleoyl taurate, and said admixture further comprises calcium lignosulfonate and triethanolamine.
10. A hydraulic cement composition comprising portland cement, a calcium salt set accelerator, and a fatty acid aminosulfonic acid surfactant.
11. The cement composition of claim 10 further comprising at least one aggregate.
PCT/US1996/018300 1995-11-17 1996-11-15 Multipurpose admixture for hydraulic cement composition WO1997019032A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP51980097A JP4251505B2 (en) 1995-11-17 1996-11-15 Multi-purpose mixture for hydraulic cement compositions
KR1019980703599A KR100579778B1 (en) 1995-11-17 1996-11-15 Multipurpose Mixture for Hydraulic Cement Composition
AU77336/96A AU7733696A (en) 1995-11-17 1996-11-15 Multipurpose admixture for hydraulic cement composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US690095P 1995-11-17 1995-11-17
US60/006,900 1995-11-17

Publications (1)

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WO1997019032A1 true WO1997019032A1 (en) 1997-05-29

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KR (1) KR100579778B1 (en)
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WO (1) WO1997019032A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999002465A1 (en) * 1997-07-10 1999-01-21 Nyfotek As Set-accelerating mixture for concrete
JP2001302309A (en) * 2000-04-25 2001-10-31 Seltec Corp Production process of instant stripping concrete product
US6485561B1 (en) * 2000-03-03 2002-11-26 Clinton D. Dattel Low density cellular concrete with accelerators for rapid hardening
JP2003502260A (en) * 1999-06-15 2003-01-21 ダブリュ・アール・グレイス・アンド・カンパニー・コネテイカット High initial strength cement and additive and method for producing the same
US20120041103A1 (en) * 2009-02-17 2012-02-16 Chryso Fast Hydraulic Binder for Parts and Constructions Made of Concrete Containing A Calcium Salt
AT514510A1 (en) * 2013-06-26 2015-01-15 Baustofftechnik Gmbh Künettenfüllmaterial
US9353004B2 (en) 2011-03-15 2016-05-31 Kao Corporation Dispersant for a hydraulic composition

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
KR100888243B1 (en) * 2007-06-19 2009-03-10 주식회사 실크로드시앤티 Accelerating admixture compositions for increasing fly ash mixing ratios in winter season
EP2105419A1 (en) * 2008-03-28 2009-09-30 Lafarge Additives for cement
JP5467588B2 (en) * 2008-07-17 2014-04-09 原嶋 友子 Cement admixture, mortar or concrete production method and mortar or concrete product
KR100911721B1 (en) * 2008-09-30 2009-08-10 나종천 Compound, and mortar and concrete including the same
JP5006466B2 (en) * 2010-11-19 2012-08-22 花王株式会社 Dispersant for hydraulic composition
JP6054736B2 (en) * 2012-12-21 2016-12-27 花王株式会社 Hydraulic composition

Citations (4)

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Publication number Priority date Publication date Assignee Title
US5316572A (en) * 1989-12-11 1994-05-31 Nmb Ltd. Method of manufacturing concrete for placement in air not requiring consolidation
US5322562A (en) * 1990-07-12 1994-06-21 Sandoz Ltd. Production of cement-mortar dry mix
US5352290A (en) * 1991-06-25 1994-10-04 Jdc Corporation Concrete composition
US5432212A (en) * 1993-04-05 1995-07-11 W. R. Grace & Co.-Conn. Dispersant composition for cement having excellent property in inhibition of slump-loss

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5316572A (en) * 1989-12-11 1994-05-31 Nmb Ltd. Method of manufacturing concrete for placement in air not requiring consolidation
US5322562A (en) * 1990-07-12 1994-06-21 Sandoz Ltd. Production of cement-mortar dry mix
US5352290A (en) * 1991-06-25 1994-10-04 Jdc Corporation Concrete composition
US5432212A (en) * 1993-04-05 1995-07-11 W. R. Grace & Co.-Conn. Dispersant composition for cement having excellent property in inhibition of slump-loss

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999002465A1 (en) * 1997-07-10 1999-01-21 Nyfotek As Set-accelerating mixture for concrete
JP2003502260A (en) * 1999-06-15 2003-01-21 ダブリュ・アール・グレイス・アンド・カンパニー・コネテイカット High initial strength cement and additive and method for producing the same
JP4883859B2 (en) * 1999-06-15 2012-02-22 ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット High initial strength cement and additive and method for producing the same
US6485561B1 (en) * 2000-03-03 2002-11-26 Clinton D. Dattel Low density cellular concrete with accelerators for rapid hardening
JP2001302309A (en) * 2000-04-25 2001-10-31 Seltec Corp Production process of instant stripping concrete product
US20120041103A1 (en) * 2009-02-17 2012-02-16 Chryso Fast Hydraulic Binder for Parts and Constructions Made of Concrete Containing A Calcium Salt
US8992680B2 (en) * 2009-02-17 2015-03-31 Lafarge Fast hydraulic binder for parts and constructions made of concrete containing a calcium salt
US9353004B2 (en) 2011-03-15 2016-05-31 Kao Corporation Dispersant for a hydraulic composition
AT514510A1 (en) * 2013-06-26 2015-01-15 Baustofftechnik Gmbh Künettenfüllmaterial
AT514510B1 (en) * 2013-06-26 2018-01-15 Baustofftechnik Gmbh Künettenfüllmaterial

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JP2000511151A (en) 2000-08-29
AU7733696A (en) 1997-06-11
JP4251505B2 (en) 2009-04-08
KR19990067576A (en) 1999-08-25
KR100579778B1 (en) 2006-10-24

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