Acid formates for use as setting and early strength development accelerators in cementitious compositions
US4261755A · kind A · utility
13Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1979 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Nov 6, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B24/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to the use of sodium, calcium and ammonium salts of formic acid as early strength developers and setting accelerators in hydraulic cements, concretes, mortars and plasters. The salts used are acidic salts containing between 1.5 and 5 moles of the formate ion per mole of the cation. These salts have much greater solubility and are more effective than the corresponding calcium salts, particularly under low temperature conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.