The present invention relates to a new class of chemical admixtures for hydraulic cement compositions and methods of preparing same. The admixtures, which include complexes of metals with one or more hydroxycarboxylic acids and/or derivatives of hydroxycarboxylic acids, improve at least the following properties of cement compositions: hardness, compressive strength, shrinkage, and freeze-thaw resistance. Hydraulic cement compositions that may be improved with the chemical admixtures include pastes, mortars, grouts and concretes, all of which may be made from ordinary Portland cement, blended cements, or non-Portland cements made with Supplementary Cementitious Materials.
本发明涉及一种新型
化学外加剂,用于
水泥组成物,并提供了制备方法。该外加剂包括
金属与一个或多个羟基
羧酸及/或羟基
羧酸衍
生物的复合物,可改善
水泥组成物的硬度、抗压强度、收缩和抗冻融性等性质。可使用该
化学外加剂改善的
水泥组成物包括糊状物、灰浆、灌浆和混凝土,这些可由普通波特兰
水泥、混合
水泥或使用补充
水泥材料制成的非波特兰
水泥制成。