Apparatus for producing cementitious product from quenched fly ash
US4482096A · kind A · utility
Inventor
Key dates
| Filing date | Jan 21, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Jan 21, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cementitious product is produced from a combination of two groups of materials: the first group consisting of lime of Portland cement or Linfan (which is defined as a thermally cracked shell of calcium sulfate surrounding a core of lime) or Linvein (a lime particle coated with cracked calcium carbonate); and a second material consisting of thermally cracked fly ash which is cracked by thermally quenching such finely divided particulate material from an elevated temperature at least above 300.degree. C. and preferably higher than 450.degree. C. to ambient or below ambient temperatures. The two materials are blended together. They are mixed with water, placed in a form, and then allowed to cure. Filler materials can also be used in the form of sand, gravel, and other aggregates, depending upon the strength and compositional characteristics desired in the final product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.