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    • 4. 发明授权
    • Retarder for calcium sulfoaluminate cements
    • 硫铝酸钙水泥缓凝剂
    • US06818057B2
    • 2004-11-16
    • US10378447
    • 2003-03-03
    • William HanleyDaniel ConstantinerJohann Goldbrunner
    • William HanleyDaniel ConstantinerJohann Goldbrunner
    • C04B732
    • C04B24/04C04B24/003C04B28/065C04B40/0039C04B2103/20
    • When hydrated, calcium sulfoaluminate cements form ettringite. A retarder which retards this reaction is at least one of phosphono alkyl carboxylic acid and a salt of a phosphono alkyl carboxylic acid. Additionally, the retarder can comprise at least one of a carboxylic acid and a salt of a carboxylic acid. The retarder can be prepared as an admixture for addition to cement, or the retarder can be included in a cementitious formulation. Also, other cements, such as portland cement, can be included with the calcium sulfoaluminate cementitious formulation. A method of retarding the set of a calcium sulfoaluminate cementitious formulation without substantially reducing achievable compressive strength, comprises providing in the cementitious formulation, a retarder comprising a component being at least one of phosphono alkyl carboxylic acid and a salt of a phosphono alkyl carboxylic acid.
    • 当水合时,硫铝酸钙水泥形成钙矾石。 延迟反应的缓凝剂是膦酰基烷基羧酸和膦酰基烷基羧酸的盐中的至少一种。 另外,缓凝剂可以包含羧酸和羧酸盐中的至少一种。 缓凝剂可以作为添加到水泥的混合物制备,或者缓凝剂可以包含在水泥配方中。 此外,其他水泥,例如波特兰水泥,可以包含在磺酸铝酸钙水泥配方中。 包括在基本上不降低可实现的抗压强度的情况下延迟硫酸铝钙胶结制剂的组合的方法包括在水泥制剂中提供包含至少一种膦酰基烷基羧酸和膦酰基烷基羧酸盐的组分的缓凝剂。