Cement composition
US4069063A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Nov 24, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/1018
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A portland cement product with or without added gypsum is described in which carbon dioxide gas has been homogeneously reacted with the cement slurry during the water-cement mixing. The use of carbon dioxide in an amount from 0.1% to 6.0% by weight of ground cement controls setting and also results in hydraulic cement mixes which are more stable following hydration. The portland cement mixes of this invention may also include the addition of certain acids or acid/salts in amounts sufficient to improve fluidity and accelerate hydration and hardening of the cement products, in amounts from 0.1% to 5.0% by weight of said ground cement. Lignosulfonates and other water reducers may also be added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.