Strength enhancing additive for certain portland cements
US4990190A · kind A · utility
24Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Oct 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinkder during finish milling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.