[특허]Method for accelerating setting of cement and the compositions produced therefrom

[미국특허] Method for accelerating setting of cement and the compositions produced therefrom 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C04B-024/04
출원번호	US-0228008 (2002-08-26)
발명자 / 주소	Boggs, Bruce Rhodes, Douglas
출원인 / 주소	ISG Resources, Inc.
대리인 / 주소	Hessler & Vanderburg
인용정보	피인용 횟수 : 18 인용 특허 : 51

초록 ▼

The invention pertains to a method for producing rapid setting cement and to the compositions produced therefrom. The setting time of hydraulic cement compositions comprising Portland cement and fly ash can be accelerated by controlling the pH of an activator slurry used in the composition. The pH of the activator slurry is controlled by non-stoichiometrically balancing the accelerating salts therein such that the activator slurry is alkaline, or having a pH greater than 7. The slurry activator of the present invention generally includes a base component, an acid component, and water. The base component can include any basic alkali and alkaline earth metal hydroxide, or a salt of the acid component. The acid component may include a hydroxycarboxylic acid, preferably citric acid. Mortar and concrete compositions can be prepared with this hydraulic cement wherein the compositions can achieve high strengths in a short time.

대표청구항 ▼

1. A method of accelerating the setting time of a hydraulic cement mixture comprising mixing said hydraulic cement mixture with an accelerator slurry having an alkaline pH, wherein said accelerator slurry comprises an hydroxycarboxylic acid, a pH balancing agent, and water, and wherein said pH balancing agent comprises a member selected from the group consisting of alkali and alkaline earth metal hydroxides and salts of said hydroxycarboxylic acid. 2. The method as recited in claim 1 wherein said hydraulic cement comprises Portland cement and fly ash. 3. The method as recited in claim 1 wherein said fly ash is present in an amount by weight of about ⅓ the total weight of said fly ash and said Portland cement in said hydraulic cement mixture. 4. The method as recited in claim 2 wherein said fly ash includes Class C and Class F fly ash. 5. The method as recited in claim 2 wherein said slurry is added to said hydraulic cement mixture in an amount of about 1-12 wt % based on the weight of said hydraulic cement mixture. 6. The method as recited in claim 1 wherein said hydroxycarboxylic acid comprises two or more carboxy functions. 7. The method as recited in claim 1 wherein said hydroxycarboxylic acid comprises a member selected from the group consisting of citric acid, malic acid, glycolic acid and glyoxylic acid. 8. The method as recited in claim 7 wherein said hydroxycarboxylic acid is citric acid. 9. The method as recited in claim 5 wherein said slurry has a pH of about 8 to about 10. 10. An accelerator slurry for accelerating the setting time of a hydraulic cement mixture, said slurry having an alkaline pH and comprising a hydroxycarboxylic acid, a base pH balancing agent, and water, said pH balancing agent comprising a member selected from the group consisting of alkali and alkaline earth metal hydroxides and salts of said acid. 11. The accelerator slurry as recited in claim 10 wherein said hydroxy carboxylic acid comprises 2 or 3 carboxy functions. 12. The accelerator slurry as recited in claim 11 wherein said hydroxycarboxylic acid comprises citric acid. 13. The method as recited in claim 1 wherein said pH balancing agent comprises a salt of said hydroxycarboxylic acid. 14. The method as recited in claim 1 wherein about 1-12 wt % of said accelerator slurry is mixed with about 100 parts by weight of said hydraulic cement mixture. 15. The method as recited in claim 1 wherein said slurry comprises about 1-10 wt % of said hydroxycarboxylic acid and about 1-10 wt % of said pH balancing agent. 16. The accelerated slurry as recited in claim 10 wherein said pH balancing agent comprises a salt of said hydroxycarboxylic acid. 17. The accelerator slurry as recited in claim 10 wherein said hydroxycarboxylic acid comprises at least two carboxy functional groups. 18. The accelerator slurry as recited in claim 10 wherein said hydroxycarboxylic acid compromises a member selected from the group consisting of citric, malic, malonic, glyoxylic and glycolic acids. 19. The accelerator slurry as recited in claim 10 wherein said hydroxycarboxylic acid is citric acid. 20. The accelerator slurry as recited in claim 10 wherein said slurry comprises about 1-10 wt % of said hydroxycarboxylic acid and about 1-10 wt % of said pH balancing agent.

이 특허에 인용된 특허 (51) 인용/피인용 타임라인 분석

Pistilli Michael F. (Lombard IL), Accelerator for portland cement derived from fertilizer.
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Roy Amitava (Baton Rouge LA) Schilling Paul J. (Baton Rouge LA) Eaton Harvill C. (Baton Rouge LA), Alkali activated class C fly ash cement.
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Roy Amitava (Baton Rouge LA) Schilling Paul J. (Baton Rouge LA) Eaton Harvill C. (Baton Rouge LA), Alkali activated class C fly ash cement.
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Sommer, Marcel; Wombacher, Franz; Burge, Theodor A., Alkali-free setting and hardening accelerator.
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Styron Robert William, Blended hydraulic cement.
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Styron Robert William, Blended hydraulic cement.
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Kirkpatrick William D. (1431 S. Ocean Blvd. ; #10 Pompano Beach FL 33062) Kirkpatrick Carole W. (1431 S. Ocean Blvd. ; #10 Pompano Beach FL 33062), Blended hydraulic cement for both general and special applications.
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Heitzmann Richard F. (Pearland TX) Gravitt Billy B. (Katy TX) Sawyer James L. (Friendswood TX), Cement composition curable at low temperatures.
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Turpin ; Jr. Raymond C. (3825 Wieuca Ter. ; NW. Atlanta GA 30342), Cement compositions containing self-setting pozzolans.
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Yamagisi Hirosi (Oumi JPX) Sakamaki Shozo (Oumi JPX) Nakagawa Koji (Oumi JPX) Sirasawa Minoru (Oumi JPX), Cement retarder and rapid hardening cement containing the same.
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Berry William A. (Burlington CAX), Cementitious binder for consolidated fill.
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Harris Harry A. (Leawood KS), Cementitious composition.
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Brook John W. (Mantua OH) Factor David F. (Hiram OH) Kinney Frederick D. (Broadview Hts. OH) McCallen Celeste L. (Wexford PA) Young Andrea M. (Redondo Beach CA), Cementitious compositions.
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Brook John W. (Mantua OH) Factor David F. (Hiram OH) Kinney Frederick D. (Broadview Hts. all of OH) McCallen Celeste L. (Wexford PA) Young Andrea M. (Redondo Beach CA), Cementitious compositions containing fly ash.
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Stav Elisha,ILX ; Burkard Edward A. ; Finkelstein Ronald S. ; Winkowski Daniel A. ; Metz Lambert J. ; Mudd Patrick J., Cementitious gypsum-containing binders and compositions and materials made therefrom.
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Stav Elisha (Amherst NY) Burkard Edward A. (East Amherst NY) Finkelstein Ronald S. (East Amherst NY), Cementitious gypsum-containing compositions and materials made therefrom.
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Braun Hans-Ruediger (Palling DEX), Chloride-free hardening accelerant for portland cement and process thereof.
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Liskowitz John W. (Belle Mead NJ) Wecharatana Methi (Parsippany NJ) Jaturapitakkul Chai (Bangkok THX) Cerkanowicz ; deceased Anthony E. (late of Livingston NJ by Elizabeth M. Cerkanowicz ; executrix , Compressive strength of concrete and mortar containing fly ash.
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Smeltzer Eugene E. (Salem Township ; Westmoreland County PA) Skriba Michael C. (Plum Boro PA), Encapsulation of ion exchange resins.
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Styron Robert William, Fly ash composition.
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Francis Hubert C. (Lithonia GA) Ksionzyk Anne H. (Decatur GA), Flyash-based compositions.
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Michael Patrick Shake ; Salvatore C. Immordino ; James R. Wittbold, Hydration enhancing additives.
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Gravitt Billy B. (Katy TX) Heitzmann Richard F. (Pearland TX) Sawyer James L. (Friendswood TX), Hydraulic cement and composition employing the same.
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Arfaei Ahmad (Tewksbury Milford MA) Jardine Leslie A. (Tewksbury Chelmsford MA) Jeknavorian Ara (Chelmsford MA), Hydraulic cement set-accelerating admixtures incorporating amino acid derivatives.
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Ulibarri Ramon Poo,MXX ; Gonzalez Waltter Lopez,MXX ; Torres Jose,MXX, Hydraulic cement with accelerated high strength development.
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Allemann Kurt (Schmitten CHX) Deneke Klaus (Troisdorf DEX) Hass Hansjrgen (Troisdorf DEX) Vogel Gnter (Hennef DEX), Liquid accelerator for the setting of concrete mixtures.
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Kunzi Robert A. (Bakersfield CA) Vinson Edward F. (Duncan OK) Totten Patty L. (Duncan OK) Brake Bobby G. (Duncan OK), Low temperature well cementing compositions and methods.
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Styron Robert William ; Abiodun Kamal Seyi, Method of making a mineral filler from fly ash.
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Styron Robert William ; Abiodun Kamal Seyi, Method of making mineral filler and pozzolan product from fly ash.
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Styron Robert William ; Hwang Jiann-Yang, Method of removing carbon from fly ash.
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Ronin Vladimir,SEX, Method of treating cement clinker.
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Heitzmann Richard E. (Pearland TX) Fitzgerald Mark (Houston TX) Sawyer James L. (Friendswood TX), Mineral binder and compositions employing the same.
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Heitzmann Richard F. (Pearland TX) Fitzgerald Mark (Houston TX) Sawyer James L. (Friendswood TX), Mineral binder and compositions employing the same.
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Riley Victor (26 Dunedin Drive Toronto ; Ontario NC CAX M8X 2K5) Muralidharan Krishnamurthy (4309-F Trinity Ave. Greensboro NC 27407), Multiple purpose patching composition.
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Hopkins Donald S. (Thornhill CAX) Oates David B. (Schomberg MN CAX) Anderson Rayburn R. (Wayzata MN) Lehoux Paul H. (Kingston CAX), Pozzolan blends.
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Burge Theodor A. (Geroldswil CHX) Bosch Klemens (Dietikon CHX) Mai Dieter (Bilten CHX), Process for accelerating the setting and hardening of material which contains a hydraulic binder, setting and hardening.
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Styron Robert William, Process for making a blended hydraulic cement.
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Forss Bengt (Pargas FIX), Process for producing a binder for slurry, mortar, and concrete.
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Kirkpatrick William D. (1431 S. Ocean Blvd. ; #10 Pompano Beach FL 33062) Kirkpatrick Carole W. (1431 S. Ocean Blvd. ; #10 Pompano Beach FL 33062), Process for producing a hydraulic cement binder for both general and special applications.
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Kirkpatrick William D. (1431 S. Ocean Blvd. ; #10 Pompano Beach FL 33062) Kirkpatrick Carole W. (1431 S. Ocean Blvd. ; #10 Pompano Beach FL 33062), Process for producing a hydraulic cement binder for both general and special applications.
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Furlong Tresea (Nacogdoches TX) Hearne John (Nacogdoches TX), Process for producing solid bricks from fly ash, bottom ash, lime, gypsum, and calcium carbonate.
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Hums Dieter,DEX ; Lippe Klaus F.,DEX, Process for the manufacture of construction materials.
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Bloss Wolfgang (Reichshof DEX), Process with calcium sulfite hemihydrate in a powdery byproduct from dry flue gas desulfurization for the production of.
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Schutz Raymond J. (Sedalia CO), Rapid setting accelerators for cementitious compositions.
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Patel Jashbhai M. (Amherst NY), Ready mixed setting-type joint compound and method of making same.
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Patel Jashbhai M., Ready mixed setting-type joint compound, and method of making same.
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Lunkenheimer Rudolf,DEX ; Breker Johannes,DEX ; Potencsik Istvan,DEX ; Altmann Horst,DEX ; Sedelies Reinhold,DEX, Solidifying and hardening accelerator for hydraulic binders.
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Sommer, Marcel; Wombacher, Franz; Burge, Theodor A., Sulfate-free and alkali-free setting and hardening accelerator.
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Burge Theodor A. (Geroldswil CHX) Mader Urs (Frauenfeld CHX) Sulser Ueli (Oberengstringen CHX) Wombacher Franz (Zurich CHX), Thixotroping and set-accelerating additive for mixtures containing a hydraulic binder, process using the additive, appar.
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Styron Robert W. (Marietta GA), Use of alumina clay with cement fly ash mixtures.
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Helmboldt Otto (Ludwigshafen DEX) Potencsik Istvan (Mannheim DEX) Breker Johannes (Ludwigshafen DEX) Sedelies Reinhold (Schifferstadt DEX) Roggenkamp Detlev (Ludwigshafen DEX), Use of basic aluminium sulphates as low-alkali set accelerators for cement.
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Gill, Iqbal, Chemical admixtures for hydraulic cements.
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Gill, Iqbal, Chemical admixtures for hydraulic cements.
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Dubey, Ashish, Dimensionally stable geopolymer composition and method.
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Perez-Pena, Marianela, Fast setting portland cement compositions with alkali metal citrates and phosphates with high early-age compressive strength and reduced shrinkage.
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Perez-Pena, Marianela, Fly ash based lightweight cementitious composition with high compressive strength and fast set.
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Perez-Pena, Marianela, Fly ash based lightweight cementitious composition with high compressive strength and fast set.
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Dubey, Ashish; Chithiraputhiran, Sundararaman, Freeze-thaw durable geopolymer compositions and methods for making same.
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Kiely, Donald E.; Hash, Kirk R.; Kramer-Presta, Kylie; Smith, Tyler N., Hydroxycarboxylic acids and salts.
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Hill, Russell L.; Majors, Russ, Inorganic polymer/organic polymer composites and methods of making same.
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Perez-Pena, Marianela, Lightweight foamed fly ash based binders and method.
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Perez-Pena, Marianela, Method for in-situ manufacture of a lightweight fly ash based aggregate.
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Kompalli, Rajeswari; Bright, Randall P.; Hahner, Christoph; Cartee, Karoline, Modified cement tile adhesive and grout.
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[미국특허] Method for accelerating setting of cement and the compositions produced therefrom 원문보기

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[미국특허] Method for accelerating setting of cement and the compositions produced therefrom 원문보기

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