Cement admixture, cement composition, and method for suppressing carbonation using the same
US7527689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Nov 2, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cement admixture and a cement composition having a carbonation suppressing effect and a heat-of-hydration suppressing effect are provided. A cement admixture containing one or more non-hydraulic compounds selected from the group consisting of γ-2CaO.SiO2, α-CaO.SiO2 and calcium magnesium silicate, a cement composition containing said admixture, and a carbonation suppressing method by use of said cement admixture or cement composition. According to the present invention, a remarkable carbonation suppressing effect can be obtained particularly when used in portland blast-furnace slag cement. This leads to an effective use of steelmaking slag and the like, and the load of clinker can be reduced, so that a cement composition of a low environmental load type can be attained. Further, this is suitable for cements in conformity with the EN standards, which are used in civil engineering and building industries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.