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    • 7. 发明授权
    • Cementitious dry cast mixture
    • 水泥干混合物
    • US06461425B2
    • 2002-10-08
    • US09847693
    • 2001-05-02
    • Heath BrownJeffrey R. BuryLan HuangRunhai LuJesse OsborneKen SrokaThomas M. Vickers, Jr.
    • Heath BrownJeffrey R. BuryLan HuangRunhai LuJesse OsborneKen SrokaThomas M. Vickers, Jr.
    • C04B2412
    • C04B24/2647C04B24/163C04B24/243C04B24/26C04B24/2641C04B24/2652C04B24/2664C04B24/267C04B24/2688C04B24/2694C04B2103/408C04B2111/00068
    • The present invention is directed to cementitious dry cast mixtures for forming cementitious articles, particularly a cementitious dry cast mixture containing a dispersant, wherein said dispersant is a derivatized polycarboxylate dispersant which is a polymer comprising units derived from at least a substituted carboxylic acid monomer or substituted ethylenically unsaturated monomer, and optionally including at least one of an unsaturated hydrocarbon, an N-polyoxyalkylene maleimide, and a condensation product of an unsubstituted carboxylic acid monomer and an alkoxypolyoxyalkylene primary amine substituted carboxylic acid monomer. The cementitious dry cast mixture has a reduced effective dose of dispersant; compacts and consolidates in response to vibration energy; reduces the cycle time in the production of articles manufactured from dry cast mixtures; provides for increased green strength, density, and early compressive strength; and improves the surface aesthetics of articles manufactured from dry cast mixtures. Additionally, a surface active agent/air entraining agent can be included in combination with the dispersant to provide for increased swipe effect.
    • 本发明涉及用于形成水泥质制品的水泥质干法浇铸混合物,特别是含有分散剂的水泥质干浇注混合物,其中所述分散剂是衍生化的聚羧酸酯分散剂,其是包含衍生自至少取代的羧酸单体或取代的单体的聚合物 烯键式不饱和单体,并且任选地包括不饱和烃,N-聚氧化烯马来酰亚胺和未取代的羧酸单体和烷氧基聚氧化烯伯胺取代的羧酸单体的缩合产物中的至少一种。 水泥质干法浇注混合物的分散剂有效剂量降低; 响应于振动能量紧凑和整合; 减少了由干式混合物制造的制品生产中的循环时间; 提供增加的生坯强度,密度和早期抗压强度; 并且改善了由干式混合物制造的制品的表面美观性。 此外,表面活性剂/加气剂可以与分散剂结合使用以提供增加的擦拭效果。