| 摘要 |
A cement pumpability-enhancing additive which confers good pumpability on cementitious compositions such as concrete consists essentially of (a) polyethylene glycol; (b) diethylene glycol monobutyl ether and/or a derivative thereof; (c) polysaccharide; and (d) a thickening polymer selected from the group consisting of polyacrylic acid derivatives, polyacrylic amide derivatives, cellulose ethers, polyphenyl ethers and polyalkylene glycol fatty acid esters; the weight solids proportions of (a), (b), (c), and (d) in the additive being respectively 5-55 %, 10-80 %, 1-20 % and 1-20 %. The additive is preferably used with a cement dispersing agent.
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