Cement additive and cement composition
US8133317B2 · kind B2 · utility
5Cited by
6References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 13, 2006 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | May 9, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S106/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cement additive contains industrial waste and has the effect of inhibiting formation of monosulfate in a hardened cementitious material. The cement additive contains specifically calcium carbonate, gypsum and coal ash and/or blast-furnace slag powder. This enables efficient use of industrial waste, allows inhibiting monosulfate formation in the hardened cementitious material, and allows producing a hardened cementitious material having good durability (sulfate resistance).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.