[특허]Compositions and methods for controlling the setting behavior of cement slurries using carbonated fly ash

Compositions and methods for controlling the setting behavior of cement slurries using carbonated fly ash 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C04B-018/06
출원번호	UP-0377800 (2006-03-16)
등록번호	US-7736430 (2010-07-05)
발명자 / 주소	Barron, Andrew R. Lupu, Corina Jackson, Katherine L. Bard, Sean Funkhouser, Gary
출원인 / 주소	William Marsh Rice University Halliburton Energy Services, Inc.
대리인 / 주소	Baker Botts L.L.P.
인용정보	피인용 횟수 : 43 인용 특허 : 0

초록 ▼

A method of treating fly ash to modify the set time and the induction profile for a slurry comprising cement and the fly ash. The method comprising mixing fly ash with an aqueous solution comprising the calcium carbonate, thereby modifying the set time and the induction profile of the slurry comprising cement and the fly ash. A method of treating fly ash to modify the induction profile of a slurry comprising cement and the fly ash. The method comprising contacting fly ash with a wet gas stream comprising water vapor and carbon dioxide in an amount sufficient to react with the fly ash so as to modify the induction profile of the slurry comprising cement and the fly ash. Cement compositions comprising water, hydraulic cement, and carbonated fly, and associated methods of use.

대표청구항 ▼

What is claimed is: 1. A method of treating fly ash to modify the set time and the induction profile for a cement slurry comprising: providing fly ash; providing an aqueous solution comprising calcium carbonate; mixing the fly ash with the aqueous solution comprising the calcium carbonate so as to produce carbonated fly ash; and mixing the carbonated fly ash with the cement slurry, thereby modifying the set time and the induction profile of the cement slurry. 2. The method of claim 1 wherein the fly ash is selected from the group consisting of Class C fly ash, Class F fly ash, Class I fly ash, and combinations thereof. 3. The method of claim 1 wherein the calcium carbonate is present in the aqueous solution in an amount in the range of from about 0.01 moles per liter to about 0.6 moles per liter of the aqueous solution. 4. The method of claim 1 further comprising flowing a gas stream comprising carbon dioxide through the aqueous solution comprising the calcium carbonate while mixing the fly ash with the aqueous solution comprising the calcium carbonate. 5. The method of claim 1 further comprising heating the mixture of the fly ash and the aqueous solution comprising the calcium carbonate. 6. The method of claim 1 further comprising removing at least a substantial portion of the fly ash from the mixture of the fly ash and the aqueous solution comprising the calcium carbonate. 7. The method of claim 6 further comprising drying the fly ash that was removed from the mixture. 8. The method of claim 7 wherein the step of drying the fly ash comprises heating the fly ash. 9. The method of claim 1 further comprising contacting the fly ash with a wet gas stream comprising water vapor and carbon dioxide in an amount sufficient to react with the fly ash. 10. The method of claim 9 wherein the step of contacting the fly ash with the wet gas stream occurs prior to the step of mixing the fly ash with the aqueous solution comprising the calcium carbonate. 11. A method of treating fly ash to modify the induction profile of a cement slurry comprising: providing fly ash; providing a wet gas stream comprising water vapor and carbon dioxide in an amount sufficient to react with the fly ash; contacting the fly ash with the wet gas stream so as to produce carbonated fly ash; and mixing the carbonated fly ash with the cement slurry, thereby modifying the induction profile of the cement slurry. 12. The method of claim 11 wherein the fly ash is contacted with the wet gas stream for a period of time of from about 5 hours to about 10 hours. 13. The method of claim 11 further comprising flowing a gas stream comprising carbon dioxide through a volume of water to obtain the wet gas stream. 14. The method of claim 13 wherein the gas stream is an exhaust stream. 15. The method of claim 11 wherein the carbon dioxide is present in the wet gas stream in an amount greater than about 0.002 moles per liter of the wet gas stream. 16. The method of claim 11 further comprising mixing the fly ash with an aqueous solution comprising calcium carbonate. 17. The method of claim 16 wherein the step of mixing the fly ash with the aqueous solution occurs prior to the step of contacting the fly ash with the wet gas stream. 18. The method of claim 16 further comprising drying the fly ash, after mixing the fly ash with the aqueous solution comprising the calcium carbonate.

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Compositions and methods for controlling the setting behavior of cement slurries using carbonated fly ash 원문보기

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