Additive for air-entrained super plasticized concrete, concrete produced thereby and method of producing air-entrained super plasticized concrete
US4328145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1979 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Oct 26, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B24/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Air entrained, super plasticized concrete having a maximum bubble spacing factor of 0.008 inch (ASTM Standard C 457) and a method for preparing such concrete are disclosed. The method includes the steps of adding an air entraining agent while mixing aggregates and water, adding during the mixing a small but effective quantity of a potassium salt of a fluorinated alkyl carboxylate having a high surface activity and a pH of 8-9, and then adding a super plasticizer to the resulting mix prior to placement. The air entrained concrete having the aforesaid bubble spacing factor contains a super plasticizer, a vinsol resin air entraining agent, and a potassium salt of a fluorinated alkyl carboxylate. The fluorinated alkyl carboxylate is present in an amount of one to two parts per 100 parts of the super plasticizer on a weight basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.