High-strength portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof
US-2023278927-A1 · Sep 7, 2023 · US
Cement admixture, expansion material, and cement composition
US12378161B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12378161-B2 |
| Application number | US-202117996717-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 22, 2021 |
| Priority date | Apr 23, 2020 |
| Publication date | Aug 5, 2025 |
| Grant date | Aug 5, 2025 |
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- Title
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Abstract
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A cement admixture containing free lime, gypsum, Ye'elimite, and ternesite, wherein the cement admixture has a mass ratio of the Ye'elimite to the ternesite (Ye'elimite/ternesite) of from 0.5 to 40. The cement admixture contains 20 to 80 mass % of the free lime. The cement admixture has a total mass ratio of the free lime and the gypsum anhydride to the ternesite ((free lime+gypsum anhydride)/ternesite) from 20 to 90. An expansive material which contains the cement admixture. A cement composition which contains the cement admixture.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cement admixture, comprising free lime, gypsum anhydride, Ye'elimite, and ternesite, wherein a mass ratio of the Ye'elimite to the ternesite (Ye'elimite/ternesite) is 0.5 to 40. 2. The cement admixture according to claim 1 , wherein the cement admixture contains 20 to 80 mass % of the free lime. 3. The cement admixture according to claim 1 , wherein a total mass ratio of the free lime and the gypsum anhydride to the ternesite ((free lime+gypsum anhydride)/ternesite) is 20 to 90. 4. An expansive material comprising the cement admixture according to claim 1 . 5. A cement composition comprising the cement admixture according to claim 1 .
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Classifications
containing hydraulic cements other than calcium sulfates · CPC title
Oxides, Hydroxides (C04B22/0013 takes precedence) · CPC title
- C04B22/14Primary
containing sulfur in the anion, e.g. sulfides · CPC title
- C04B40/0039Primary
Premixtures of ingredients · CPC title
Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation (mixtures of cements C04B7/00, C04B28/00) · CPC title
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- What does patent US12378161B2 cover?
- A cement admixture containing free lime, gypsum, Ye'elimite, and ternesite, wherein the cement admixture has a mass ratio of the Ye'elimite to the ternesite (Ye'elimite/ternesite) of from 0.5 to 40. The cement admixture contains 20 to 80 mass % of the free lime. The cement admixture has a total mass ratio of the free lime and the gypsum anhydride to the ternesite ((free lime+gypsum anhydride)/t…
- Who is the assignee on this patent?
- Denka Company Ltd
- What technology area does this patent fall under?
- Primary CPC classification C04B22/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 05 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).