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    • 100. 发明授权
    • Method and composition for controlling volume change in fast setting,
fluid impermeable cementitious systems
    • 用于控制快速凝固体积变化的方法和组成,不透液性水泥体系
    • US4357166A
    • 1982-11-02
    • US262175
    • 1981-05-11
    • Warner K. Babcock
    • Warner K. Babcock
    • C04B22/06C04B22/08C04B22/10C04B24/04C04B28/06C04B7/02
    • C04B28/065C04B22/062C04B22/10C04B24/04
    • A cementitious composition which, when mixed with water, is capable of setting rapidly into a hard mass of high compressive strength without substantial shrinkage during setting, and having reduced wet and dry volume changes in the hardened state comprises aluminous cement, gypsum, a drying shrinkage inhibitor and a wet expansion inhibitor. The wet expansion inhibitor is a lithium salt which may be added in an effective amount ranging between 0.01 to 0.5 percent, by weight, based on the aluminous cement and gypsum and preferably between 0.1 and 0.3 percent. It is preferred to employ between 60 and 90 percent, by weight, aluminous cement and between 10 and 40 percent, by weight, gypsum. The hardened drying shrinkage inhibitor, preferably Portland cement, is added in an amount ranging between 0.1 and 25 percent, by weight, based on the aluminous cement and gypsum, and preferably between 1 and 20 percent.
    • 当与水混合时,水泥组合物能够快速固化成具有高抗压强度的硬质量,而在固化期间没有显着的收缩,并且在硬化状态下具有减小的湿和干体积变化的方法包括含水泥浆,石膏,干燥收缩率 抑制剂和湿膨胀抑制剂。 湿膨胀抑制剂是锂盐,其可以以基于铝水泥和石膏的0.01至0.5重量%的有效量加入,优选为0.1至0.3重量%。 优选使用60-90重量%的铝土水泥和10-40重量%的石膏。 硬化的干燥收缩抑制剂,优选是波特兰水泥,其添加量为基于铝土水泥和石膏的0.1至25重量%,优选为1至20%。