Water-reducing admixtures for cementitious compositions
US5880182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/302
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An admixture for decreasing the water demand of cementitious compositions such as concrete consists of PA1 (a) from 75-25% by weight of a water-reducing agent whose major component is a polycarboxylate; and PA1 (b) from 25-75% by weight of at least one saccharide component selected from hydrogenated saccharides and polyhydric alcohol adducts of saccharides. The saccaride component is preferably a hydrogenated polysaccharide with a molecular weight distribution as follows: PA1 (i) 70-30% by weight (on total weight of hydrogenated saccharides) have molecular weights in the range 180-300; PA1 (ii) 30-70% by weight have molecular weights of from 300 up to 4,000; and PA1 (iii) 30% by weight maximum have molecular weights of 4,000 and over.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.