| abstract |
The present invention is a composition for use as a stable additive concentrate, such as an aqueous solution or powder, in a cement admixture, comprising i) pendant or side chain polyether groups, 140,000-50 One or more nonionic or substantially nonionic vinyl or acrylic brush polymers having a weight average molecular weight of 1,000,000, and ii) one or more phenolic groups or one or more aromatics One or more aromatic cofactors, preferably a branched aromatic cofactor containing a combination of groups and at least one sulfur acid group, and iii) containing carboxylic acids or bases, polyether side chains and One or more polycarboxylate ether copolymer water reducing agents having a weight average molecular weight of 5,000 to 100,000. |