IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0604383
(2009-10-22)
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등록번호 |
US-7815880
(2010-11-08)
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발명자
/ 주소 |
- Constantz, Brent R.
- Youngs, Andrew
- Holland, Terence C.
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출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
82 인용 특허 :
112 |
초록
▼
Reduced-carbon footprint concrete compositions, and methods for making and using the same, are provided. Aspects of the reduced-carbon footprint concrete compositions include CO2-sequestering carbonate compounds, which may be present in the hydraulic cement and/or aggregate components of the concret
Reduced-carbon footprint concrete compositions, and methods for making and using the same, are provided. Aspects of the reduced-carbon footprint concrete compositions include CO2-sequestering carbonate compounds, which may be present in the hydraulic cement and/or aggregate components of the concrete. The reduced-carbon footprint concrete compositions find use in a variety of applications, including use in a variety of building materials and building applications.
대표청구항
▼
What is claimed is: 1. A method comprising: a) producing synthetic carbonates from a divalent cation-containing solution and an industrial waste gas comprising CO2; b) producing from the synthetic carbonates i) a first material comprising a supplementary cementitious material comprising carbonates,
What is claimed is: 1. A method comprising: a) producing synthetic carbonates from a divalent cation-containing solution and an industrial waste gas comprising CO2; b) producing from the synthetic carbonates i) a first material comprising a supplementary cementitious material comprising carbonates, bicarbonates, or a combination thereof, wherein the supplementary cementitious material reacts with a hydraulic cement composition, and additionally ii) a second material comprising a concrete component comprising carbonates, bicarbonates, or a combination thereof selected from the group consisting of cement, aggregate, and pozzolanic material; and c) incorporating the supplementary cementitious material into a concrete composition. 2. The method of claim 1, wherein at least one of the synthetic carbonates comprise aragonite, hydromagnesite, monohydrocalcite, or a combination thereof. 3. The method of claim 1, wherein the synthetic carbonates have a δ13C less than −10‰. 4. The method of claim 1, wherein the synthetic carbonates have a δ13C less than −20‰. 5. The method of claim 1, wherein the synthetic carbonates have a δ13C less than −30‰. 6. The method of claim 1, further comprising incorporating the concrete component into the concrete composition. 7. The method of claim 6, wherein the concrete component comprises aggregate. 8. The method of claim 1 or claim 6, further comprising determining a carbon footprint for the concrete composition, wherein determining the carbon footprint consists essentially of the steps of i) multiplying the number of pounds of a concrete component per cubic yard of the concrete component by the number of pounds of carbon dioxide per pound of the concrete component to obtain a multiplication product; ii) repeating step i) for each concrete component in the concrete composition; iii) summing the one or more multiplication products corresponding to the concrete composition to obtain the carbon footprint for the concrete composition. 9. The method of claim 8 wherein the concrete composition is a reduced-carbon concrete composition, such that a cubic yard of the reduced-carbon footprint concrete composition has a carbon footprint that is less than a carbon footprint of a cubic yard of an ordinary Portland concrete composition consisting essentially of ordinary Portland cement produced by a process of calcining a carbonate source, water, fine aggregate, and coarse aggregate, the carbon footprint for the ordinary Portland concrete composition being as determined in steps i)-iii) of claim 8. 10. The method of claim 9, wherein the reduced-carbon footprint concrete composition has a carbon footprint that is at least 25% less than the carbon footprint of the ordinary Portland concrete composition. 11. The method of claim 9, wherein the reduced-carbon footprint concrete composition has a carbon footprint that is at least 50% less than the carbon footprint of the ordinary Portland concrete composition. 12. The method of claim 9, wherein the reduced-carbon footprint concrete composition has a carbon footprint that is at least 75% less than the carbon footprint of the ordinary Portland concrete composition. 13. The method of claim 8, wherein the reduced-carbon footprint concrete composition has a carbon footprint that is neutral. 14. The method of claim 8, wherein the reduced-carbon footprint concrete composition has a carbon footprint that is negative. 15. The method of claim 14, wherein the negative carbon footprint is −250 lbs CO2/yd3 or less. 16. The method of claim 14, wherein the negative carbon footprint is −500 lbs CO2/yd3 or less.
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