Hydraulic cement set-accelerating admixtures incorporating glycols
    1.
    发明授权
    Hydraulic cement set-accelerating admixtures incorporating glycols 失效
    加入二醇的液压水泥固化加速混合物

    公开(公告)号:US5348583A

    公开(公告)日:1994-09-20

    申请号:US125905

    申请日:1993-09-24

    IPC分类号: C04B24/00

    CPC分类号: C23F11/181

    摘要: New set-accelerating admixtures for hydraulic cement compositions are disclosed. These admixtures incorporate known set accelerators and certain low molecular weight glycols, e.g., glycerol and ethylene glycol, are found to be surprisingly effective in decreasing the initial set time of hydraulic cements, mortars, and concretes, and are advantageous as reduced-temperature set-accelerators. Preferred embodiments of the invention may also comprise a component selected from the group consisting of certain alkanolamines and mixtures thereof.

    摘要翻译: 公开了用于水硬性水泥组合物的新的固化加速混合物。 这些混合物掺入已知的集合促进剂和某些低分子量的二醇(例如甘油和乙二醇)在降低水硬性水泥,砂浆和混凝土的初始设定时间方面令人惊奇地有效,并且作为降温设定是有利的, 加速器。 本发明的优选实施方案还可以包含选自某些链烷醇胺及其混合物的组分。

    Processing additives for blended cements
    8.
    发明授权
    Processing additives for blended cements 失效
    混合水泥加工助剂

    公开(公告)号:US5017234A

    公开(公告)日:1991-05-21

    申请号:US554040

    申请日:1990-07-13

    摘要: This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C.sub.4 AF, when mixed with up to 0.2% of a higher trialkanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 80% fillers or clinker substitutes. The higher trialkanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.

    摘要翻译: 本发明涉及一种提高某些混合水泥的较晚的年龄强度的方法。 在本发明的方法中,某些混合水泥,特别是由含有至少4%C 4 AF的水泥熟料制成的混合水泥,当与高达0.2%的较高三烷醇胺混合时,表现出7和28天压缩强度的显着增加。 本发明的混合水泥含有5-80%的填料或熟料代用品。 较高的三烷醇胺强度增强添加剂可以与水泥粉末混合,或者可以在精铣过程中与水泥熟料相互接触。

    Rare earth modifiers for Portland cement
    10.
    发明授权
    Rare earth modifiers for Portland cement 失效
    波特兰水泥稀土改性剂

    公开(公告)号:US4619702A

    公开(公告)日:1986-10-28

    申请号:US610345

    申请日:1984-05-15

    申请人: Ellis M. Gartner

    发明人: Ellis M. Gartner

    IPC分类号: C04B7/42 C04B7/02

    CPC分类号: C04B7/422

    摘要: Rare earth elements, added to the raw materials mixture fed to a cement kiln, produce cement compositions having increased early compressive strengths. Preparation of such cements requires less grinding of clinkers to achieve equivalent early strengths than similar compositions without the rare earth elements.

    摘要翻译: 添加到进料到水泥窑的原料混合物中的稀土元素产生具有增加的早期抗压强度的水泥组合物。 与没有稀土元素的类似组合物相比,这种水泥的制备需要较少的熟料研磨以达到等效的早期强度。