Sulfoaluminous clinker without iron and without free lime, its process of preparation and its use in white binders
US6695910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Oct 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The lightly colored sulfoaluminous clinker contains: more than 55% by weight of calcium sulfoaluminate phase (C4A3S), more than 10% by weight of belite phase (C2S), less than 10% by weight of anhydrite (C{overscore (S)}), and contains practically no ferrite phase, nor a gehlenite phase (C2AS), nor free lime. It is prepared by a process of roasting carried out at temperatures comprised between about 1250° C. and 1350° C. It can be used for a wide range of applications by combining it with a source of calcium sulfate and/or Portland cement, to obtain binders having specific properties (color, setup time, mechanical strength, expansion or contraction . . . ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.