Cement Composition Comprising Nano-Platelets
US-2015152314-A1 · Jun 4, 2015 · US
Cements reinforced with graphene nanoplatelets or helical carbon nanotubes
US2022242787A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022242787-A1 |
| Application number | US-202217588586-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 31, 2022 |
| Priority date | Feb 1, 2021 |
| Publication date | Aug 4, 2022 |
| Grant date | — |
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Abstract
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Methods for the dispersion and synthesis of graphene nanoplatelet-cement composites and helical carbon nanotube composites with high concentrations of graphene nanoplatelets or helical carbon nanotubes that do not require chemical dispersion aids or dispersion-enhancing chemical surface functionalization are provided. Also provided are the reinforced cement composites made using the methods.
First claim
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What is claimed is: 1 . A cement composite comprising: Portland cement; and graphene nanoplatelets or helical carbon nanotubes, wherein: the cement composite is free of chemical dispersing aids; the cement composite has a fracture toughness of at least 0.65 MPa√{square root over (m)}; the cement composite has a porosity of no greater than 8.5%; and the cement composite has a water absorption of no greater than 4.5%. 2 . The cement composite of claim 1 , consisting essentially of the graphene nanoplatelets or the helical carbon nanotubes. 3 . The cement composite of claim 1 , wherein the graphene nanoplatelets or the helical carbon nanotubes are free of dispersion-enhancing chemical surface functionalization. 4 . The cement composite of claim 1 , comprising the graphene nanoplatelets. 5 . The cement composite of claim 4 , having a concentration of graphene nanoplatelets in the range from 0.1 wt % to 0.5 wt. %, based on the weight of the Portland cement. 6 . The cement composite of claim 5 , having a fracture toughness in the range from 0.65 MPa√{square root over (m)} to 0.75 MPa√{square root over (m)}. 7 . The cement composite of claim 4 , having a porosity in the range from 4.5% to 7.5%. 8 . The cement composite of claim 4 , having a water absorption in the range from 2.0% to 4.0%. 9 . The cement composite of claim 6 , having a porosity in the range from 4.5% to 7.5% and a water absorption in the range from 2.0% to 4.0%. 10 . The cement composite of claim 9 , wherein the graphene nanoplatelets are free of dispersion-enhancing chemical surface functionalization. 11 . The cement composite of claim 1 , comprising the helical carbon nanotubes. 12 . The cement composite of claim 11 , having a concentration of helical carbon nanotubes in the range from 0.1 wt % to 0.5 wt. %, based on the weight of the Portland cement. 13 . The cement composite of claim 12 , having a fracture toughness in the range from 0.65 MPa√{square root over (m)} to 0.75 Mpa√{square root over (m)}. 14 . The cement composite of claim 11 , having a porosity in the range from 6.8% to 8.5%. 15 . The cement composite of claim 11 , having a water absorption in the range from 3.5% to 4.5%. 16 . The cement composite of claim 11 , having a porosity in the range from 6.8% to 8.5% and a water absorption in the range from 3.5% to 4.5%. 17 . The cement composite of claim 16 , wherein the helical carbon nanotubes are free of dispersion-enhancing chemical surface functionalization.
Assignees
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Classifications
- C04B28/04Primary
Portland cements · CPC title
- C04B14/026Primary
of particular shape, e.g. nanotubes · CPC title
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- What does patent US2022242787A1 cover?
- Methods for the dispersion and synthesis of graphene nanoplatelet-cement composites and helical carbon nanotube composites with high concentrations of graphene nanoplatelets or helical carbon nanotubes that do not require chemical dispersion aids or dispersion-enhancing chemical surface functionalization are provided. Also provided are the reinforced cement composites made using the methods.
- Who is the assignee on this patent?
- Univ Northwestern
- What technology area does this patent fall under?
- Primary CPC classification C04B28/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 04 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).