| 摘要 |
<p>A hydraulic cement mix including hydraulic cement, aggregate, sufficient water to effect hydraulic setting of the cement, and an additive comprising mixtures of alkali and alkanolamine salts of alkylarylsulfonic acids and alpha olefinsulfonic acids, and alkali and alkanolamine salts of fatty acids, and a nonionic component selected from polyethylene glycol derivatives and diethanolamine adducts of cocamide, the mixtures being added at a dosage required to entrain in said hydraulic cement mix a desired level of air, which remains substantially stable on extended mixing.</p> |
