| abstract |
The invention relates to a method for producing a hydraulic binder, comprising contacting a composition comprising cement clinker, before, during or after the grinding procedure, with (a) a defoaming agent and (b) 0.0005% to 2% by weight, based on the total composition, of at least one air-introducing compound, the defoaming agent (a) comprising 0.0001% to 0.5% by weight, based on the total composition, of at least one defoaming agent of the formula R 10 —(C m H 2m —O—) x —(C d H 2d —O—) c —H and the ratio of (a) to (b) being between 1:1 to 1:200. |