Method for controlling contraction in setting cementitious systems
US4654084A · kind A · utility
5Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1983 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Oct 12, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B28/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The contractions of aqueous hydraulic cement mixtures in the plastic state is controlled by the addition of a gas generating agent capable of generating gas in the mixture without the addition of activators or other agents, and which does not generate disagreeable or noxious ammonia fumes. The gas generation may be controlled over an extended period of time so that even slow setting cementitious mixtures may have their shrinkage or contraction inhibited while in the plastic state during setting or hardening without the generation of ammonia fumes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.