| 摘要 |
<p>Preparing a hydraulic binding agent, comprises contacting a composition containing cement clinker before, during or after the grinding process with (ai) 0.0001-0.5 wt.% defoaming agent (I), based on the total composition and (bi) 0.0005-2 wt.% at least one air entraining compound, based on the total composition. The ratio of (ai) to (bi) is 1:1-1:200. Preparing a hydraulic binding agent, comprises contacting a composition containing cement clinker before, during or after the grinding process with (a) 0,0001-0.5 wt.% defoaming agent of formula (R10-(C mH2 m-O-) x-C dH 2 d-O-) c-H) (I), based on the total composition and (b) 0.0005-2 wt.% at least one air entraining compound, based on the total composition. R10 : optionally branched 4-20C alkyl; m : 2 or 3; d : 4-20; x : 2-20; and c : 1-5. Independent claims are also included for: (1) the hydraulic binding agent produced by the above mentioned method; and (2) an additive comprising 0.1-1 pts. wt. (ai), 1-20 pts. wt. (bi) and 0-40 pts. wt. water.</p> |
